CN106375041A - Portable device for extracting characteristic parameters of wireless communication channel - Google Patents

Abstract

The invention discloses a portable apparatus for extracting characteristic parameters of a wireless communication channel. The portable apparatus is specifically used for extracting different characteristics in the wireless channel in a complex electromagnetic environment, sensing environmental parameters in a specific scene, and providing a mathematical description of parameter characteristics and a statistical rule of temporal and spatial change so as to support patent implementation personnel to adjust related parameters of the wireless communication channel to improve the frequency spectrum utilization ratio. The device comprises a primary processing module, a secondary identification module, a wireless signal collection module and an environment sensing module. The device adopts a three-level balanced digital structure of signal processing, identification and understanding, has the advantages of high integration level, strong data processing capability and flexible application, can adapt to high-precision and total-probability reception, extraction and evaluation of mass characteristic parameters in large-instant-bandwidth fast-time-varying wireless communication, and has important significance to optimizing the production of a communication network in the complex electromagnetic environment.

Description

Portable device for extracting characteristic parameters of wireless communication channel

technical field

The invention relates to the technical field of wireless communication, in particular to a portable device for extracting characteristic parameters of wireless communication channels.

Background technique

In recent years, the wide application of "Internet" and "Internet of Things" has stimulated the rapid development of the wireless communication industry at an astonishing speed, and the rapid growth of visualization applications based on mobile communication has made frequency band resources more and more tense and precious. At the same time, Cognitive wireless technology has attracted widespread attention due to its flexible use, high spectrum utilization, and the ability to use spectrum without authorization. The most notable capability of cognitive radio is the perception of wireless channels and electromagnetic environments. The wireless channel formed by the electromagnetic link between the transceiver devices is closely related to the environment, and the characteristics of the wireless channel in different electromagnetic environments are also different. Therefore, extracting the differentiated features in wireless channels, especially in specific scenarios or in different areas, and giving a scientific mathematical description, will help to understand and grasp the statistical laws of temporal and spatial changes in the wireless environment, and ultimately maintain Smooth communication and avoiding user interference are of great importance.

The characteristic parameters of the wireless communication channel are received and extracted by the digital receiver. These signals are all non-cooperative signals, their number, bandwidth, and location are unknown, and their time-varying characteristics are significant; The electromagnetic environment we live in is becoming more and more complex. Therefore, the front-end device or receiver used for channel characteristic parameter extraction needs to have large bandwidth, high precision, high sensitivity, large dynamic range, and multi-signal parallel real-time processing capabilities, so as to achieve full probability reception and identification of signals in the detection frequency band.

FPGA has the advantages of high-speed parallelism, rich resources, and flexible design reconfiguration. At the same time, multi-core DSP chip technology has achieved unprecedented development in terms of technology and computing power. The multi-level data processing and recognition system based on FPGA and DSP Architecture, because of its advantages of high integration and balanced distribution of signal processing tasks, has been widely used in communication, electronics, aerospace and other fields. Compared with the traditional computer-centered huge system architecture and limited application, design and develop portable equipment for extracting wireless communication channel characteristic parameters with powerful data processing functions, and adjust the wireless communication channel correlation according to the obtained statistical laws of temporal and spatial changes. Parameters (such as carrier frequency, bandwidth, and transmission power, etc.), thereby improving spectrum utilization, are of great significance to the optimal production of communication networks in complex electromagnetic environments.

Contents of the invention

The technical problem to be solved by the present invention is to overcome the problems of bulky and limited application of traditional computer-based integrated solutions, and provide a multi-level signal processing and identification system architecture based on FPGA and DSP, which can be constructed into a usable It is a portable device for extracting characteristic parameters of wireless communication channels, which is used to analyze the statistical laws of temporal and spatial changes in wireless communication channels, thereby optimizing communication parameters and improving spectrum utilization.

The technical solution adopted by the present invention to solve its technical problems is:

A portable device for extracting characteristic parameters of a wireless communication channel, including a primary processing module, a secondary identification module, a wireless signal acquisition module and an environmental sensing module; the wireless signal acquisition module is bidirectionally connected to the primary processing module, and the environmental sensing module is connected to the primary processing module The modules are bidirectionally connected, and the primary processing module and the secondary identification module are bidirectionally connected;

The wireless signal acquisition module is used to complete the coupling, down-conversion and analog-to-digital conversion of the space electromagnetic signal of the wireless communication channel; and transmit the digitized space electromagnetic signal after down-conversion and analog-to-digital conversion to the primary processing module;

The environmental sensing module is used to complete the transformation and perception of the environmental parameters of the space area where the portable device is located during the implementation of the present invention. Typical environmental parameters include air pressure, temperature, humidity, altitude, and GPS longitude and latitude information; The primary processing module U1 transmits the converted and sensed digitized environmental parameters;

The primary processing module is used to complete the digitized signal collected by the wireless signal acquisition module and the environmental sensing module (that is, the digitized space electromagnetic signal transmitted by the wireless signal acquisition module after down-conversion and analog-to-digital conversion, and the digital signal transmitted by the environmental sensing module The reception and primary processing of the transformed and perceived digital environmental parameters transmitted over, typical primary processing includes signal filtering, information screening, parameter calibration and correction; at the same time, the primary processing module carries out environmental sensor in the environmental sensing module Initialization configuration; the primary processing module performs behavioral logic control on the analog-to-digital converter in the wireless signal acquisition module;

The secondary identification module is used to receive the data packet from the primary processing module, and perform parameter estimation and information identification on the data packet; at the same time, it feeds back the identified key feature information to the primary processing module, so that the primary processing module timely Actions such as adjusting the filter window function or finely sorting information can be done in a timely manner; the typical key feature information identified includes: the center frequency of the signal, signal strength, noise level, modulation format, etc.

The portable device for extracting characteristic parameters of the wireless communication channel of the present invention has the following connection relationship with the outside world: the wireless signal acquisition module and the environment sensing module are respectively connected to the wireless communication channel, and the secondary identification module and the subsequent understanding module are bidirectionally connected.

The portable device for extracting characteristic parameters of the wireless communication channel of the present invention has the following signal topology relationship: the original environmental parameter S1 of the wireless communication channel is input into the environmental sensing module, and the digitized environmental parameter S3 obtained after transformation and sensing is sent to the primary processing module; The original space electromagnetic signal S2 of the wireless communication channel is input to the wireless signal acquisition module, and the digitized space electromagnetic signal S4 is obtained after down-conversion and analog-to-digital conversion, and then sent to the primary processing module; the primary processing module processes the two digitized signals S3 and S4. After the typical primary processing, the first processed signal is obtained, the first processed signal, S3 and S4 are packaged into the first data packet S5 and then sent to the secondary identification module; the secondary processing module performs the parameter estimation and information on the data packet S5 The second processing signal is identified, and the second processing signal, S3 and S4 are encapsulated into a second data packet S6 and then sent to the subsequent understanding module; conversely, the primary processing module can initialize the environmental sensor in the environmental sensing module configuration, and can also perform behavioral logic control on the analog-to-digital converter in the wireless signal acquisition module; in order to adjust and optimize the performance of the primary processing module, the secondary identification module can feed back the identified key feature information to the primary processing module; in order to adjust and Optimize the performance of the secondary processing module, and the subsequent understanding module can feed back the key feature information understood to the secondary processing module; thus forming a closed loop of the data processing link.

The post-level comprehension module can be embodied as a hardware device and software assembly with data storage and information processing, such as an embedded device, an industrial computer or a server.

The primary processing core is integrated in the FPGA chip in the form of IP CORE (Intellectual Property, intellectual property core), mainly composed of the following on-chip resources: DSP48E slices (DSP48E unit), LUTs (Look-upTables, look-up table), DB-RAM (Dual-port RAM Blocks, dual-port RAM), FIFO (First Input First Output queue) and SM (Share Memories, shared memory.

The secondary recognition kernel is integrated in the DSP chip in the form of a function library, mainly composed of the following on-chip resources: MDB (Mult-Data Bus, multiple data bus), ALU (Arithmetic Logic Unit, arithmetic logic unit), PM (Parallel Multiplier , parallel multiplier) and OC-RAM (On-chip RAM, on-chip memory).

Preferably, in the above-mentioned portable device for extracting characteristic parameters of wireless communication channels, the wireless signal acquisition module includes an array antenna, a down-converter and an analog-to-digital converter. The array antenna, the down-converter and the analog-to-digital converter are connected in sequence; the wireless signal acquisition module is connected with the wireless communication channel through the array antenna.

The array antenna completes the reception of electromagnetic signals in the wireless communication channel;

The down-converter completes the down-conversion of the space electromagnetic signal and converts the radio frequency signal to an intermediate frequency;

The analog-to-digital converter completes the analog-to-digital conversion of the converted intermediate frequency signal, has the characteristics of multi-channel high-speed parallelism, and can adapt to the high-speed and high-precision collection of characteristic parameters of wireless communication channels with fast time-varying and large bandwidth characteristics.

Preferably, in the above-mentioned portable device for extracting characteristic parameters of wireless communication channels, the environment sensing module includes an environment sensor network, a signal isolation circuit and an MCU (single-chip microcomputer). The environmental sensor network, signal isolation circuit and MCU (single chip microcomputer) are connected in sequence; the wireless communication channel is connected with the wireless communication channel through the environmental sensor network.

The environmental sensor network completes the induction and conversion of the environmental parameters of the wireless communication channel in the space area where the portable device of the present invention is located;

The signal isolation circuit completes the electrical isolation between the environmental sensor network and the MCU (single-chip microcomputer), and is used to ensure the safety of the portable devices involved in the complex electromagnetic environment. The isolation methods generally adopt photoelectric isolation, transformer isolation, and transformer isolation, etc. Way;

The MCU (single-chip microcomputer) completes the analog-to-digital conversion and buffering of the isolated environmental parameters, and encapsulates various environmental parameters into data according to the frame format of the USB (Universal Serial Bus) or UART (Universal Asynchronous Receiver Transmitter) protocol Bag.

Preferably, in the above-mentioned portable device for wireless communication channel feature parameter extraction, the primary processing module takes FPGA device as the core, including signal collector, code system converter, primary processing core, dual-port RAM, serial communication The interface, MicroBlaze and DDR3-I, signal collector, code converter, primary processing core, dual-port RAM, serial communication interface and MicroBlaze are all realized in the FPGA chip in the form of IP CORE (Intellectual Property Core). The signal collector, the code system converter, the primary processing core and the serial communication interface are connected in sequence, and the primary processing core is bidirectionally connected with the dual-port RAM;

The signal collector completes the acquisition and buffering of parallel digital signals from the analog-to-digital converter, and controls ADC chip behaviors such as whether the on-chip Gaussian filter is enabled, data output code system selection, etc. through sequential logic;

The code system converter completes the code system conversion of the original data collected by the signal collector, such as data conversion between code systems such as Gray code and natural code;

The primary processing core completes the primary processing of the digital signal after code system conversion, such as signal filtering and information screening, etc.; simultaneously completes the filtering, calibration and correction of the environmental parameters from the serial communication interface;

The dual-port RAM serves as a data bridge between the primary processing module and the secondary identification module. The dual-port RAM has an A data port and a B data port. For the FPGA chip, the primary processing core stores the data to be forwarded from the A data port to the dual-port RAM; for the FPGA chip, the dual-port RAM can be addressed and accessed by the external processor from the B data port as a storage device; Ground, the primary processing module and the secondary identification module use EMFI (External Memory Interface: external memory interface) for data communication;

The serial communication interface completes the analysis of the environmental parameter data package uploaded by the MCU (single-chip microcomputer); at the same time, the MCU can be configured through the USB or UART interface;

Described MicroBlaze is 32 soft-core processors of Xilinx Company, completes described signal collection, code system transformation, primary processing core, dual-port RAM, serial communication interface and DDR3 by PLB (Processor Local Bus: processor local bus) -1 control; said MicroBlaze is the master node of the PLB bus; said signal collector, code system converter, primary processing core, dual-port RAM and serial communication interface are the slave nodes of the PLB bus;

The DDR3-I provides 1GB of memory space, which is used to adapt to the large-scale consumption of memory during the signal primary processing of the primary processing core; it can also provide data buffer space for the signal collector; it can also be used to adapt to FPGA and DSP. data throughput rate.

Preferably, in the above-mentioned portable device for extracting characteristic parameters of wireless communication channels, the secondary identification module takes DSP device as the core, including FIFO, secondary identification core, high-speed communication interface and DDR3-II. The FIFO U21, the secondary identification core U22, and the high-speed communication interface U23 are bidirectionally connected in sequence. FIFO, secondary recognition core and high-speed communication interface are all encapsulated in DSP device.

The FIFO, as a first-in-first-out queue (First Input First Output), completes the two-way buffering of the data flow with the dual-port RAM;

The secondary identification kernel completes the calculation and solution of typical information such as the center frequency, signal strength, noise level, and modulation format of the space electromagnetic signal, and performs parameter estimation and information identification on the wireless communication channel;

The high-speed communication interface, as a data bridge between the secondary identification module and the subsequent understanding module, completes the high-speed data communication between the portable device for extracting the characteristic parameters of the wireless communication channel of the present invention and the external subsequent understanding module, Without loss of generality, Ethernet (Ethernet) can be selected, or Aurora (Aurora) optical fiber communication method;

The DDR3-II provides 1GB of memory space, which is used to adapt to the large-scale consumption of memory during the signal secondary recognition process of the secondary recognition core; at the same time, it can be used to adapt to the data throughput rate between the DSP and the subsequent understanding module.

The above technical scheme has the following beneficial effects:

(1) Compared with the traditional huge system architecture with computer as the core, the present invention is a portable device with FPGA and DSP as the core, with higher integration and more flexible application;

(2) It adopts a three-level digital structure of signal processing (with FPGA as the carrier), identification (with DSP as the carrier) and understanding (with traditional computer as the carrier), which can adapt to the massive characteristics of large instantaneous bandwidth and fast time-varying wireless communication High-precision, full-probability reception, extraction and evaluation of parameters;

(3) The adopted FPGA and multi-core DSP are rich in resources and have excellent data processing capabilities. The space electromagnetic signals and environmental parameters are filtered and screened at the data layer with the largest data scale. In addition to improving the electromagnetic compatibility of the entire system , so that the data processing pressure of the third-level, that is, the post-level comprehension module is significantly reduced, and its form of expression is relatively flexible (embedded devices, industrial computers or servers can be used).

Description of drawings

FIG. 1 is a schematic structural diagram of a portable device according to an embodiment of the present invention;

FIG. 2 is a detailed structural diagram of the portable device of the embodiment shown in FIG. 1 .

detailed description

The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the present invention. Obviously, the collected and described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

With reference to Fig. 1, the portable device that is used for wireless communication channel feature parameter extraction of the present invention comprises primary processing module U1, secondary identification module U2, wireless signal acquisition module U3 and environment sensing module U4; Wireless signal acquisition module U3 and primary processing The module U1 is bidirectionally connected, the environmental sensing module U4 is bidirectionally connected to the primary processing module U1, and the primary processing module U1 is bidirectionally connected to the secondary identification module U2;

The wireless signal acquisition module U3 is used to complete the reception, down-conversion and analog-to-digital conversion of the space electromagnetic signal of the wireless communication channel U5, and transmit the digitized space electromagnetic signal after down-conversion and analog-to-digital conversion to the primary processing module U1;

The environmental sensing module U4 is used to complete the conversion and perception of the environmental parameters of the space area where the portable device is located during the implementation of the present invention. Typical environmental parameters include air pressure, temperature, humidity, altitude and GPS longitude and latitude information; Module U1 transmits the transformed and sensed digitized environmental parameters;

The primary processing module U1 is used to complete the digitized signal collected by the wireless signal acquisition module U3 and the environmental sensing module U4 (that is, the digitized spatial electromagnetic signal transmitted by the wireless signal acquisition module U3 after down-conversion and analog-to-digital conversion, and the environmental sensor The transformed and sensed digitized environmental parameters transmitted by the module U4) are received and primary processed, and typical primary processing includes signal filtering, information screening, parameter calibration and correction, etc. The environmental sensor in the wireless signal acquisition module U3 performs initial configuration; the primary processing module U1 performs behavioral logic control on the analog-to-digital converter in the wireless signal acquisition module U3 of the analog-to-digital converter;

The primary processing module U1 receives the digitized signals of the wireless signal acquisition module U3 and the environment sensing module U4, and after primary processing, sends them to the secondary identification module U2 in the form of data packets;

The secondary identification module U2 receives the data packets from the primary processing module U1, and performs parameter estimation and information identification; at the same time, it feeds back the identified key feature information to the primary processing module U1, so that the primary processing module U1 can make timely adjustments such as adjusting the filter window. Function or fine sorting information and other actions; the key feature information for identification includes: signal center frequency, signal strength, noise level, modulation format, etc.

The portable device used for extracting the characteristic parameters of the wireless communication channel of the present invention has the following connection relationship with the outside world: the wireless signal acquisition module U3 and the environment sensing module U4 are respectively connected to the wireless communication channel U5, and the secondary identification module U2 and the subsequent level understand Module U6 is bidirectionally connected.

The portable device used for extracting characteristic parameters of the wireless communication channel of the present invention has the following signal topology relationship: the original environmental parameter S1 of the wireless communication channel U5 is input into the environmental sensing module U4, and the digitized environmental parameter S3 obtained after transformation and sensing is sent to the primary processing Module U1; the original space electromagnetic signal S2 of the wireless communication channel U5 is input to the wireless signal acquisition module U3, and the digitized space electromagnetic signal S4 is obtained after down-conversion and analog-to-digital conversion, and then sent to the primary processing module U1; the primary processing module U1 digitizes the two channels The signals S3 and S4 are subjected to the typical primary processing to obtain the first processed signal, the first processed signal, S3 and S4 are encapsulated into the first data packet S5 and then sent to the secondary identification module U2; the secondary processing module U2 for the data Packet S5 performs the parameter estimation and information identification to obtain the second processed signal, the second processed signal, S3 and S4 are encapsulated into the second data packet S6 and then sent to the subsequent understanding module U6; conversely, the primary processing module U1 can Initialize the configuration of the environmental sensor in the environmental sensing module U4, and also perform behavioral logic control on the analog-to-digital converter in the wireless signal acquisition module U3; in order to adjust and optimize the performance of the primary processing module U1, the secondary identification module U2 can Feedback the identified key feature information to the primary processing module U1; in order to adjust and optimize the performance of the secondary processing module U2, the subsequent understanding module U6 can feed back the understood key feature information to the secondary processing module U2; thus forming a data processing chain closed loop of the road.

Referring to Fig. 2, the primary processing module U1, the secondary identification module U2, the wireless signal acquisition module U3 and the environment sensing module U4 in the portable device for extracting the characteristic parameters of the wireless communication channel of the present invention can be further implemented as follows :

(1) The wireless signal acquisition module U3 includes an array antenna U31, a down-converter U32 and an analog-to-digital converter U33; the array antenna U31, a down-converter U32 and an analog-to-digital converter U33 are connected in sequence; the wireless signal acquisition module U3 passes through the array antenna U31 It is connected with the wireless communication channel U5.

The array antenna U31 completes the reception of the electromagnetic signal in the wireless communication channel U5;

The down converter U32 completes the down conversion of the space electromagnetic signal and converts the radio frequency signal to an intermediate frequency;

The analog-to-digital converter U33 completes the analog-to-digital conversion of the converted intermediate frequency signal, has the characteristics of multi-channel high-speed parallelism, and can adapt to the high-speed and high-precision collection of characteristic parameters of wireless communication channels with fast time-varying and large bandwidth characteristics.

(2) Environmental sensing module U4 includes environmental sensor network U41, signal isolation circuit U42 and MCU (single-chip microcomputer) U43; environmental sensor network U41, signal isolation circuit U42 and MCU (single-chip microcomputer) U43 are connected in sequence; wireless communication channel U5 passes through environmental sensor The network U41 is connected to the wireless communication channel U5.

The environmental sensor network U41 completes the induction and conversion of the environmental parameters of the space area where the wireless communication channel U5 is located;

The signal isolation circuit U42 completes the electrical isolation between the environmental sensor network U41 and the MCU (single-chip microcomputer) U43, and is used to ensure the safety of the portable devices involved in the complex electromagnetic environment. The isolation methods generally adopt photoelectric isolation, transformer isolation and transformer isolation etc.;

MCU (single-chip microcomputer) U43 completes the analog-to-digital conversion and buffering of the isolated environmental parameters, and encapsulates various environmental parameters into data packets according to the frame format of the USB (Universal Serial Bus) or UART (Universal Asynchronous Receiver Transmitter) protocol .

(3) Primary processing module U1 takes FPGA device as the core, including signal collector U11, code system converter U12, primary processing core U13, dual-port RAM U14, serial communication interface U15, MicroBlaze U16 and DDR3-I U17, among which All functional units except DDR3-I U17 (i.e. signal collector U11, code system converter U12, primary processing core U13, dual-port RAM U14, serial communication interface U15 and MicroBlaze U16) all use IP CORE (Intellectual Property Core) in the form of FPGA chip; signal collector U11, code system converter U12, primary processing core U13 and serial communication interface U15 are sequentially connected, and primary processing core U13 is bidirectionally connected with dual-port RAM U14;

The signal collector U11 completes the acquisition and buffering of parallel digital signals from the analog-to-digital converter U33, and controls the chip behavior of the ADC such as whether the on-chip Gaussian filter is enabled, data output code system selection, etc. through strict timing logic;

The code system converter U12 completes the code system conversion of the original data of the driver layer of the signal acquisition U11, such as data conversion between code systems such as Gray code and natural code;

The primary processing core U13 completes the primary processing of the digital signal after code system conversion, such as signal filtering and information screening, etc.; at the same time completes the filtering, calibration and correction of the environmental parameters from the serial communication interface U15;

The dual-port RAM U14 serves as a data bridge between the primary processing module U1 and the secondary identification module U2. The dual-port RAM 14 is provided with an A data port and a B data port. For the FPGA chip, the primary processing core U13 stores the data that needs to be forwarded from the A data port to the dual-port RAM U14; for the FPGA chip, the dual-port RAM U14 can be used as a storage device and can be addressed by the external processor from the B data port and Access; Correspondingly, the primary processing module U1 and the secondary identification module U2 adopt EMFI (ExternalMemory Interface: external memory interface) for data communication;

The serial communication interface U15 completes the analysis of the environmental parameter data package uploaded by the MCU (single chip microcomputer) U43; at the same time, the MCU can be configured through the USB or UART interface;

MicroBlaze U16 is a 32-bit soft-core processor of Xilinx Company, through PLB (Processor Local Bus: Processor Local Bus) to complete the signal collector U11, code system converter U12, primary processing core U13, dual-port RAM U14, serial communication Control of interface U15 and DDR3-I U17; the functional unit marked with '■' is the master node (BusMaster) of the PLB bus; the functional unit marked with '●' is the slave node of the PLB bus (Bus Slave);

DDR3-I U17, providing 1GB of memory space, used to adapt to the large-scale consumption of memory during the signal primary processing of the primary processing core U13; it can also provide data buffer space for the signal collector U11; it can also be used to adapt to FPGA and DSP The data throughput rate between;

(4) The secondary identification module U2 takes the DSP device as the core, including FIFO U21, secondary identification core U22, high-speed communication interface U23 and DDR3-II U24; FIFO U21, secondary identification core U22, and high-speed communication interface U23 are connected bidirectionally in sequence . FIFO 21, secondary identification core U22 and high-speed communication interface U23 are all packaged in the DSP device.

FIFO U21, as a first-in-first-out queue (First Input First Output), completes the two-way buffering of the data flow between the dual-port RAM U14;

The secondary identification kernel U22 completes the calculation and solution of typical information such as the center frequency, signal strength, noise level, and modulation format of the space electromagnetic signal, and performs parameter estimation and information identification on the wireless communication channel;

The high-speed communication interface U23, as a data bridge between the secondary identification module U2 and the subsequent understanding module U6, completes the high-speed data communication between the portable device for extracting the characteristic parameters of the wireless communication channel of the present invention and the external subsequent understanding module U6, Ethernet (Ethernet) can be selected, and Aurora (Aurora) optical fiber communication method can also be selected.

DDR3-II U24, providing 1GB of memory space, used to adapt to the large-scale consumption of memory during the signal secondary recognition process of the secondary recognition core U22; at the same time, it can be used to adapt to the data throughput between DSP and the subsequent understanding module U6 .

The primary processing core is integrated in the FPGA chip in the form of IP CORE (Intellectual Property, intellectual property core), mainly composed of the following on-chip resources: DSP48E slices (DSP48E unit), LUTs (Look-upTables, look-up table), DB-RAM (Dual-port RAM Blocks, dual-port RAM), FIFO (First Input First Output queue) and SM (Share Memories, shared memory.

The secondary recognition kernel is integrated in the DSP chip in the form of a function library, mainly composed of the following on-chip resources: MDB (Mult-Data Bus, multiple data bus), ALU (Arithmetic Logic Unit, arithmetic logic unit), PM (Parallel Multiplier , parallel multiplier) and OC-RAM (On-chip RAM, on-chip memory).

The portable device used for extracting characteristic parameters of wireless communication channels of the present invention fully utilizes the data processing advantages of FPGA and DSP, adopts a three-level digital structure of signal processing, identification and understanding, effectively reduces hardware resource consumption, and forms a cost-effective The invented portable device can be used to receive and extract high-precision and full-probability channel characteristic parameters whose total number, bandwidth and location are unknown and time-varying in a complex electromagnetic environment.

A preferred embodiment of the present invention has been introduced in detail above. The specific embodiments are only used to help understand the core idea of the present invention. It should be pointed out that for those skilled in the art, without departing from the principle of the present invention, some improvements and modifications can be made to the present invention, and these improvements and modifications also belong to the protection scope of the claims of the present invention.

Claims (5)

1. it is used for the mancarried device of radio communication channel characteristic parameter extraction it is characterised in that including primary treatment module, secondary Level identification module, wireless signal acquiring module and environmentally sensitive module；Wireless signal acquiring module is two-way with primary treatment module Connect, environmentally sensitive module is bi-directionally connected with primary treatment module, and primary treatment module is bi-directionally connected with secondary identification module；

Described wireless signal acquiring module, for completing coupling, down coversion and the mould of the spatial electromagnetic signal of radio communication channel Number conversion；And transmit the digitized spatial electromagnetic signal after downconverted and analog digital conversion to primary treatment module；

Described environmentally sensitive module, for completing the environment at mancarried device place area of space described in implementation process of the present invention The conversion of parameter and perception, typical environment parameter includes air pressure, temperature, humidity, height above sea level and gps latitude and longitude information；And Transmit the digitized environment parameter after transformed and perception to primary treatment module；

Described primary treatment module, for completing wireless signal acquiring module and digitized signal collected by environmentally sensitive module Receive and primary treatment, the downconverted and modulus that collected digitized signal sends for wireless signal acquiring module u3 turns Digitized environment after digitized spatial electromagnetic signal after changing, the transformed and perception being sent by environmentally sensitive module u4 Parameter；Typical primary treatment includes signal filtering, information sifting, parameter calibration and correction；Meanwhile, primary treatment module is to ring Environmental sensor in the sensing module of border carries out initial configuration；Primary treatment module is to the modulus in wireless signal acquiring module Transducer carries out Action logic control；

Described secondary identification module, for receiving the packet from primary treatment module, is carried out after data to described packet Process, realize the parameter estimation to radio communication channel and information identifies；The key feature information of identification is fed back to just simultaneously Level processing module, and then make primary treatment module in time make such as adjustment filtering window function or fine sorting information Action；The representative key characteristic information of identification includes: the mid frequency of signal, signal intensity, noise level, modulation format；

Wireless signal acquiring module and environmentally sensitive module are respectively connected with radio communication channel, secondary identification module and rear class Understanding Module is bi-directionally connected；

The primal environment parameter input environment sensing module of radio communication channel, obtains digitized environment after conversion and perception Parameter is re-fed into primary treatment module；The luv space electromagnetic signal input wireless signal acquiring module of radio communication channel, warp Obtain digitized spatial electromagnetic signal after crossing down coversion and analog digital conversion and be re-fed into primary treatment module；Primary treatment module is to two Signal after railway digital obtains the first process signal, the first process signal, digitized ring after carrying out described typical case's primary treatment Border parameter and digitized spatial electromagnetic signal are packaged into the first packet and send into secondary identification module thereafter；Secondary treatment mould Block carries out described parameter estimation to packet and information identification obtains second processing signal, second processing signal, digitized environment Parameter and digitized spatial electromagnetic signal are packaged into the second packet and send into rear class Understanding Module thereafter；Oppositely, primary Processing module can carry out initial configuration to the environmental sensor in environmentally sensitive module, and in wireless signal acquiring module Analog-digital converter carry out Action logic control；In order to adjust and optimizing the performance of primary treatment module, secondary identification module will The key feature information of identification feeds back to primary treatment module；In order to adjust and optimizing the performance of secondary processing module, rear class is managed The key feature information that solution module will be understood that feeds back to secondary processing module；Thus constituting the closed loop of data processing link.

2. the mancarried device for radio communication channel characteristic parameter extraction according to claim 1 it is characterised in that Described wireless signal acquiring module includes array antenna, low-converter and analog-digital converter；Array antenna, low-converter and modulus Transducer is sequentially connected；Wireless signal acquiring module is connected with radio communication channel by array antenna；

Described array antenna, completes the reception of the electromagnetic signal in radio communication channel；

Described low-converter, completes the down coversion of spatial electromagnetic signal, radiofrequency signal is transformed to intermediate frequency；

Described analog-digital converter, the analog digital conversion of intermediate-freuqncy signal after completing to convert.

3. the mancarried device for radio communication channel characteristic parameter extraction according to claim 1 it is characterised in that Described environmentally sensitive module includes environmental sensor network, signal isolation circuit and mcu；Environmental sensor network, signal isolation Circuit and mcu are sequentially connected；Radio communication channel is connected with radio communication channel by environmental sensor network；

Described environmental sensor network, completes the sensing of environment parameter and the conversion of radio communication channel place area of space；

Described signal isolation circuit, completes the electrical isolation of environmental sensor network and mcu, involved portable for guaranteeing Use safety in complex electromagnetic environment for the device, isolation method typically takes Phototube Coupling, transformer isolation or transformer The mode of isolation；

Described mcu, the analog digital conversion of environment parameter after completing to isolate and caching, and by all kinds of environment parameters according to usb or The frame format of uart agreement is packaged into packet.

4. the mancarried device for radio communication channel characteristic parameter extraction according to claim 1 it is characterised in that Described primary treatment module with fpga device as core, including signal picker, code system transformation device, primary treatment kernel, twoport Ram, serial communication interface, microblaze and ddr3-i；

Described signal picker, completes the collection of parallel digital signal and the caching from analog-digital converter, and by strict The chip Action logic that whether sequential logic is to control Gaussian filter in adc such as piece to enable, data output code system selects；

Described code system transformation device, completes the code system transformation of the initial data of signal picker collection, such as Gray code, natural intersymbol Data conversion；

Described primary treatment kernel, completes the primary treatment of digital signal after code system transformation, such as signal filtering and information sifting； Complete the filtering of environment parameter from serial communication interface simultaneously, demarcate and revise；

Described twoport ram, as the data bridge between primary treatment module and secondary identification module；Twoport ram is provided with a data Port and b FPDP；For in fpga piece, primary treatment kernel will need the data forwarding to store to double from a FPDP Mouth ram；Outside for fpga piece, twoport ram and is accessed from the addressing of b FPDP by extraneous processor from equipment as storage-type； Accordingly, primary treatment module and secondary identification module take emfi to carry out data communication；

Described serial communication interface, completes the parsing that mcu uploads environment parameter packet；Joined by usb or uart interface simultaneously Put mcu；

Described microblaze is 32 soft-core processors of xilinx company, completes described signal picker, code system by plb Changer, primary treatment kernel, the control of twoport ram, serial communication interface and ddr3-i；Described microblaze is that plb is total The host node of line；Described signal picker, code system transformation device, primary treatment kernel, twoport ram and serial communication interface are The from node of plb bus；

Described ddr3-i, provides the memory headroom of 1gb, for adapting in the signal primary treatment of primary treatment kernel internally The extensive consumption deposited；There is provided data buffer storage space for signal picker；The data being simultaneously used for adapting between fpga and dsp gulps down Tell rate.

5. the mancarried device for radio communication channel characteristic parameter extraction according to claim 1 it is characterised in that Described secondary identification module with dsp device as core, including fifo, secondary identification kernel, high speed communication interface and ddr3- ii；Fifo, secondary identification kernel, high speed communication interface are bi-directionally connected successively；Fifo, secondary identification kernel and high speed communication interface All it is packaged in dsp device；

Described fifo, as First Input First Output, completes the bidirectional buffering of data flow and the twoport ram of fpga side between；

Described secondary identification kernel, completes mid frequency, signal intensity, noise level and the modulation format of spatial electromagnetic signal Typical information calculate and solve, and radio communication channel is carried out parameter estimation and information identification；

Described high speed communication interface, as the data bridge between described secondary identification module and rear class Understanding Module, completes this High-speed data between the rear class Understanding Module in the mancarried device of radio communication channel characteristic parameter extraction of invention and the external world leads to News, select the optical-fibre communications mode of ethernet or aurora；

Described ddr3-ii, provides the memory headroom of 1gb, right during the signal secondary identification of secondary identification kernel for adapting to The extensive consumption of internal memory；It is simultaneously used for adapting to the data throughput between dsp and rear class Understanding Module.