CN101340253A - Mobile multimedia broadcast receiving apparatus, receiving card and receiving terminal - Google Patents
Mobile multimedia broadcast receiving apparatus, receiving card and receiving terminal Download PDFInfo
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Abstract
The invention discloses a receiving device for mobile multimedia broadcast (CMMB), a receiving card and a receiving terminal thereof. The receiving device for the mobile multimedia broadcast comprises radio frequency signal receiving and transformation as well as CMMB receiving, therefore, the users can conveniently realize the support for CMMB receiving function without adding hardware design. By setting the CMMB receiving function in the receiving card, the receiving card has the CMMB signal receiving function, therefore, users only need to use the receiving card as usual by inserting the receiving card into the receiving terminal so as to conveniently realize the support for the CMMB receiving function and receive CMMB digital TV signal. For receiving terminal manufacturers, no extra software and hardware technical support are needed, therefore, the development cycle of the receiving terminal is shortened and the investment is saved.
Description
Technical Field
The present invention relates to mobile multimedia broadcasting technology, and more particularly, to a mobile multimedia broadcasting receiving apparatus, a receiving card and a receiving terminal.
Background
The China Mobile Multimedia Broadcasting technology alliance, abbreviated as China Mobile Multimedia Broadcasting (CMMB), is a technical system serving China Mobile Multimedia Broadcasting and aims to develop Multimedia receiving technology and equipment suitable for Mobile applications.
In order to receive the CMMB signal, a corresponding CMMB receiving device needs to be configured. The operation principle of the CMMB receiving device is roughly: and carrying out analog/digital conversion on the received analog signals to obtain digital signals, carrying out channel synchronization processing on the digital signals, detecting and extracting CMMB signals in the digital signals, and demodulating the extracted CMMB signals to obtain CMMB audio/video streams meeting the CMMB standard.
Generally, the CMMB signal receiving apparatus is used on a receiving terminal, which may be a mobile terminal or a fixed terminal, to enable the receiving terminal to receive a mobile multimedia data stream. In order to add a CMMB receiving function to a receiving terminal, besides the receiving terminal needs to be provided with a CMMB receiving device, a receiving terminal manufacturer such as a mobile phone manufacturer needs to add a corresponding hardware module and software processing.
In the aspect of hardware, some peripheral circuits such as a radio frequency signal receiving and converting module are added for amplifying and filtering a tiny radio frequency signal, converting the tiny radio frequency signal into a baseband signal and then sending the baseband signal to CMMB signal receiving equipment; the baseband signal may be an analog baseband signal, such as an analog zero intermediate frequency, or low intermediate frequency, or analog IQ signal, or may be a digital baseband signal, such as a digital low intermediate frequency, or digital zero intermediate frequency, or digital baseband IQ signal.
In terms of software, because interfaces provided by the CMMB signal receiving device are determined by different manufacturers and have no unified standard, mobile device manufacturers generally need to convert the CMMB audio/video stream that meets the CMMB standard and is output by the CMMB signal receiving device into the CMMB audio/video stream of the interface protocol supported by the mobile device manufacturers, and then send the CMMB audio/video stream to the processing unit of the receiving terminal through the interfaces, so as to successfully complete the reception of the CMMB signal.
At present, for a user such as a receiving terminal manufacturer, to use a CMMB signal receiving device, technical support needs to be provided in both software and hardware for supporting a CMMB receiving function in a receiving terminal, which undoubtedly brings about the problems of increasing a development period of the receiving terminal, increasing investment, and the like.
Disclosure of Invention
In view of the above, the present invention is directed to a mobile multimedia broadcast receiving apparatus capable of conveniently supporting a CMMB receiving function.
Another object of the present invention is to provide a receiving card for receiving mobile multimedia broadcasting, which can conveniently support the CMMB receiving function.
The invention also aims to provide a receiving terminal which can support the CMMB receiving function, does not need additional software and hardware technical support added by a receiving terminal manufacturer, shortens the development period of the receiving terminal and saves the investment.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
a mobile multimedia broadcasting CMMB receiving device comprises a radio frequency signal receiving and converting unit and a CMMB signal receiving unit; wherein,
the radio frequency signal receiving and converting unit is used for amplifying and filtering the radio frequency signal received by the antenna and converting the radio frequency signal into a baseband signal;
the CMMB signal receiving unit is used for processing the received baseband signal to obtain CMMB audio and video stream which accords with the CMMB standard and then outputting the CMMB audio and video stream;
the CMMB signal receiving unit is further used for converting the CMMB audio and video stream which accords with the CMMB standard into the CMMB audio and video stream which accords with the interface protocol of the interface unit and then outputting the CMMB audio and video stream.
The baseband signal is a digital baseband signal; the CMMB signal receiving unit comprises a channel synchronization module, a demodulation module and a protocol conversion module, wherein,
the signal synchronization module is used for receiving the baseband signals, detecting and extracting the CMMB signals;
the demodulation module is used for demodulating the extracted CMMB signal to obtain CMMB audio and video stream which accords with the CMMB standard;
and the protocol conversion module is used for converting the CMMB audio and video stream which accords with the CMMB standard into the CMMB audio and video stream which accords with the interface protocol of the interface module and sending the CMMB audio and video stream to the processing unit of the receiving terminal through the interface unit.
The baseband signal is an analog baseband signal;
the CMMB signal receiving unit also comprises an analog/digital conversion module which is used for converting the received analog baseband signal into a digital baseband signal and sending the digital baseband signal to the signal synchronization module.
The radio frequency signal receiving and converting unit adopts wired or wireless receiving.
When the radio frequency signal receiving and converting unit adopts wireless receiving, the antenna is arranged on the mobile multimedia broadcast receiving device, or the antenna which is applied by the mobile multimedia broadcast receiving device and is existed in the receiving terminal is utilized.
A receiving card for receiving mobile multimedia broadcasting CMMB comprises a radio frequency signal receiving and converting unit, a CMMB signal receiving unit and an interface unit; wherein,
the radio frequency signal receiving and converting unit is used for amplifying and filtering the radio frequency signal received by the antenna and converting the radio frequency signal into a baseband signal;
the CMMB signal receiving unit is used for processing the received baseband signal to obtain CMMB audio and video stream which accords with the CMMB standard and converting the CMMB audio and video stream into CMMB audio and video stream which accords with the interface protocol of the interface unit;
and the interface unit is used for sending the CMMB audio and video stream which accords with the own interface protocol to the processing unit of the receiving terminal.
The baseband signal is a digital baseband signal; the CMMB signal receiving unit comprises a channel synchronization module, a demodulation module and a protocol conversion module, wherein,
the signal synchronization module is used for receiving the baseband signals, detecting and extracting the CMMB signals;
the demodulation module is used for demodulating the extracted CMMB signal to obtain CMMB audio and video stream which accords with the CMMB standard;
and the protocol conversion module is used for converting the CMMB audio and video stream which accords with the CMMB standard into the CMMB audio and video stream which accords with the interface protocol of the interface module and sending the CMMB audio and video stream to the processing unit of the receiving terminal through the interface unit.
The baseband signal is an analog baseband signal;
the CMMB signal receiving unit also comprises an analog/digital conversion module which is used for converting the received analog baseband signal into a digital baseband signal and sending the digital baseband signal to the signal synchronization module.
The interface unit comprises an MMIS interface module, an SPI interface module, an SDI0 interface module, or an SPI interface module and an SDI0 interface.
The baseband signal is an analog baseband signal, and the analog baseband signal is an analog low intermediate frequency signal, or an analog zero intermediate frequency signal, or an analog IQ signal;
alternatively, the baseband signal is a digital baseband signal, and the digital baseband signal is a digital low intermediate frequency signal, a digital zero intermediate frequency signal, or a digital baseband IQ signal.
The radio frequency signal receiving and converting unit adopts wired or wireless receiving.
When the radio frequency signal receiving and converting unit adopts wireless receiving, the antenna is arranged on the receiving card, or the antenna which is applied by the receiving card and is existed in the receiving terminal is utilized.
The receiving card is a Mini secure data storage card Mini SD or a micro secure data storage card MicroSD or a wireless network card.
A receiving terminal at least comprises a receiving card, wherein the receiving card comprises a radio frequency signal receiving and converting unit, a CMMB signal receiving unit and an interface unit; wherein,
the radio frequency signal receiving and converting unit is used for amplifying and filtering the radio frequency signal received by the antenna and converting the radio frequency signal into a baseband signal;
the CMMB signal receiving unit is used for processing the received baseband signal to obtain CMMB audio and video stream which accords with the CMMB standard and converting the CMMB audio and video stream into CMMB audio and video stream which accords with the interface protocol of the interface unit;
and the interface unit is used for sending the CMMB audio and video stream which accords with the own interface protocol to the processing unit of the receiving terminal.
The baseband signal is a digital baseband signal; the CMMB signal receiving unit comprises a channel synchronization module, a demodulation module and a protocol conversion module, wherein,
the signal synchronization module is used for receiving the baseband signals, detecting and extracting the CMMB signals;
the demodulation module is used for demodulating the extracted CMMB signal to obtain CMMB audio and video stream which accords with the CMMB standard;
and the protocol conversion module is used for converting the CMMB audio and video stream which accords with the CMMB standard into the CMMB audio and video stream which accords with the interface protocol of the interface module and sending the CMMB audio and video stream to the processing unit of the receiving terminal through the interface unit.
The baseband signal is an analog baseband signal;
the CMMB signal receiving unit also comprises an analog/digital conversion module which is used for converting the received analog baseband signal into a digital baseband signal and sending the digital baseband signal to the signal synchronization module.
The receiving terminal is a notebook computer, a mobile phone, an MP4, a digital camera, a digital video camera, a digital camera, a GPS navigation device, an automobile multimedia system, an earphone with a control function and an earphone with a Bluetooth function.
According to the technical scheme, the mobile multimedia broadcast receiving device comprises a radio frequency signal receiving part, a radio frequency signal converting part and a CMMB receiving part, and the support for the CMMB receiving function can be conveniently realized without adding hardware design for a user. The invention enables the receiving card to have the CMMB signal receiving function by arranging the CMMB receiving function in the receiving card, and a user can conveniently realize the support of the CMMB receiving function and receive CMMB digital television signals only by inserting the receiving card into the receiving terminal as usual. For a receiving terminal manufacturer, additional software and hardware technical support is not needed, the development period of the receiving terminal is shortened, and the investment is saved.
Drawings
FIG. 1 is a schematic diagram of a mobile multimedia broadcast receiving apparatus according to the present invention;
FIG. 2 is a schematic diagram of the structure of the receiving card of the present invention;
fig. 3 is a schematic diagram of the structure of the CMMB signal receiving unit of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples.
Fig. 1 is a schematic diagram of the structure of a mobile multimedia broadcast receiving apparatus according to the present invention, as shown in fig. 1, the apparatus includes a radio frequency signal receiving and converting unit and a CMMB signal receiving unit, wherein,
and the radio frequency signal receiving and converting unit is used for amplifying and filtering the micro radio frequency signals received by the antenna and converting the micro radio frequency signals into baseband signals. The baseband signal may be an analog baseband signal, such as an analog zero intermediate frequency, or low intermediate frequency, or analog IQ signal, or may be a digital baseband signal, such as a digital low intermediate frequency, or digital zero intermediate frequency, or digital baseband IQ signal.
The antenna may be one provided on the mobile multimedia broadcast receiving apparatus card, or may be an antenna that is already provided in the receiving terminal itself and is applied to the mobile multimedia broadcast receiving apparatus. The arrangement of the antenna is conventional for those skilled in the art and will not be described in detail herein.
The specific implementation of the rf signal receiving and converting unit belongs to the prior art, and will not be described in detail here.
And the CMMB signal receiving unit is used for processing the received baseband signal to obtain CMMB audio and video stream which accords with the CMMB standard, converting the CMMB audio and video stream into CMMB audio and video stream which supports one or more interface protocols and outputting the CMMB audio and video stream. The interface protocol may be SDI0 protocol, MMIS protocol, SPI protocol, etc.
It should be noted that the CMMB signal receiving unit may also only output the CMMB audio/video stream meeting the CMMB standard, so that, when the mobile multimedia broadcast receiving apparatus of the present invention is applied, only the user needs to convert the CMMB audio/video stream meeting the CMMB standard into the CMMB audio/video stream meeting the interface protocol supported by the user.
Currently, there are many receiving cards available on the market that can be used in receiving terminals, such as: smart cards such as Mini secure data memory cards (Mini SD) and Micro secure data memory cards (Micro SD), or wireless internet access cards. The receiving terminal may include, but is not limited to, a notebook computer, a mobile phone, an MP4, a digital camera, a digital video camera, a digital camera, a GPS navigation device, a car multimedia system, a headset with a control function, a wireless receiving terminal such as a headset with a bluetooth function, etc.
Among them, Mini SD has wide application in receiving terminals. Due to the small size and good compatibility, more and more receiving terminals select the Mini SD card as a carrier of the product.
Fig. 2 is a schematic diagram of the structure of the receiving card according to the present invention, and fig. 1 only shows the units related to the support of the CMMB function and the interface units of the receiving card, and other units of the receiving card, such as a storage unit, etc., are not shown in fig. 1. As shown in fig. 1, the receiving card of the present invention comprises a radio frequency signal receiving and converting unit, a CMMB signal receiving unit and an interface unit, wherein,
and the radio frequency signal receiving and converting unit is used for amplifying and filtering the micro radio frequency signals received by the antenna and converting the micro radio frequency signals into baseband signals. The baseband signal may be an analog baseband signal, such as an analog zero intermediate frequency, or low intermediate frequency, or analog IQ signal, or may be a digital baseband signal, such as a digital low intermediate frequency, or digital zero intermediate frequency, or digital baseband IQ signal.
The antenna may be an antenna provided on the receiving card, or may be an antenna that is already provided in the receiving terminal to which the receiving card is applied. The arrangement of the antenna is conventional for those skilled in the art and will not be described in detail herein.
The specific implementation of the rf signal receiving and converting unit belongs to the prior art, and will not be described in detail here.
And the CMMB signal receiving unit is used for processing the received baseband signal to obtain CMMB audio and video stream which accords with the CMMB standard, converting the CMMB audio and video stream into CMMB audio and video stream which accords with the interface protocol of the interface unit, and sending the CMMB audio and video stream to the processing unit of the receiving terminal through the interface unit.
For example, the interface unit is an SDI0 interface unit, and the CMMB signal receiving unit needs to convert the CMMB audio/video stream into a CMMB audio/video stream conforming to the SDI0 protocol;
for example, the interface unit is a Mobile Multimedia Interface (MMIS) unit, and the CMMB signal receiving unit needs to convert a CMMB audio/video stream into a CMMB audio/video stream conforming to an MMIS protocol;
for example, the interface unit is a Serial Protocol Interface (SPI) unit, and the CMMB signal receiving unit needs to convert the CMMB audio/video stream into a CMMB audio/video stream conforming to the SPI protocol.
According to the scheme of the invention, as the receiving card has the CMMB signal receiving function, a user only needs to insert the receiving card into the receiving terminal as the receiving card is used at ordinary times, so that the support for the CMMB receiving function can be conveniently realized, and the CMMB digital television signal can be received. For a receiving terminal manufacturer, additional software and hardware technical support is not needed, the development period of the receiving terminal is shortened, and the investment is saved.
Fig. 3 is a schematic diagram of the structure of the CMMB signal receiving unit of the invention, as shown in fig. 2, if the output of the rf signal receiving and converting unit is a digital baseband signal, the CMMB signal receiving unit may comprise a channel synchronization module, a demodulation module, and a protocol conversion module, wherein,
and the signal synchronization module is used for receiving the digital baseband signal and detecting and extracting the CMMB signal.
And the demodulation module is used for demodulating the extracted CMMB signal to obtain CMMB audio and video stream which accords with the CMMB standard.
And the protocol conversion module is used for converting the CMMB audio and video stream which accords with the CMMB standard into the CMMB audio and video stream which accords with the interface protocol of the interface module and sending the CMMB audio and video stream to the processing unit of the receiving terminal through the interface unit.
The interface unit may comprise an MMIS interface module, or an SPI interface module, or an SDI0 interface module, or an SPI interface module and an SDI0 interface, etc.
In addition, a buffer module can be further arranged between the protocol conversion module and the interface unit.
If the radio frequency signal receiving and converting unit outputs the analog baseband signal, the CMMB signal receiving unit further comprises an analog/digital converting module, configured to convert the received analog baseband signal into a digital baseband signal, and send the digital baseband signal to the signal synchronizing module.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (18)
1. A mobile multimedia broadcasting CMMB receiving device is characterized by comprising a radio frequency signal receiving and converting unit and a CMMB signal receiving unit; wherein,
the radio frequency signal receiving and converting unit is used for amplifying and filtering the radio frequency signal received by the antenna and converting the radio frequency signal into a baseband signal;
the CMMB signal receiving unit is used for processing the received baseband signal to obtain CMMB audio and video stream which accords with the CMMB standard and then outputting the CMMB audio and video stream;
2. the mobile multimedia broadcast receiving device of claim 1, wherein the CMMB signal receiving unit is further configured to convert the CMMB audio/video stream conforming to the CMMB standard into a CMMB audio/video stream conforming to an interface protocol of the interface unit, and output the converted CMMB audio/video stream.
3. The mobile multimedia broadcast receiving device according to claim 1 or 2, wherein the baseband signal is a digital baseband signal; the CMMB signal receiving unit comprises a channel synchronization module, a demodulation module and a protocol conversion module, wherein,
the signal synchronization module is used for receiving the baseband signals, detecting and extracting the CMMB signals;
the demodulation module is used for demodulating the extracted CMMB signal to obtain CMMB audio and video stream which accords with the CMMB standard;
and the protocol conversion module is used for converting the CMMB audio and video stream which accords with the CMMB standard into the CMMB audio and video stream which accords with the interface protocol of the interface module and sending the CMMB audio and video stream to the processing unit of the receiving terminal through the interface unit.
4. The mobile multimedia broadcast receiving device of claim 3, wherein the baseband signal is an analog baseband signal;
the CMMB signal receiving unit also comprises an analog/digital conversion module which is used for converting the received analog baseband signal into a digital baseband signal and sending the digital baseband signal to the signal synchronization module.
5. The mobile multimedia broadcast receiving device of claim 1, wherein the rf signal receiving and converting unit employs wired or wireless reception.
6. The mobile multimedia broadcast receiving device of claim 5, wherein when the radio frequency signal receiving and converting unit employs wireless reception, the antenna is disposed on the mobile multimedia broadcast receiving device, or an antenna existing in a receiving terminal itself and applied to the mobile multimedia broadcast receiving device is utilized.
7. A receiving card for receiving mobile multimedia broadcasting CMMB is characterized by comprising a radio frequency signal receiving and converting unit, a CMMB signal receiving unit and an interface unit; wherein,
the radio frequency signal receiving and converting unit is used for amplifying and filtering the radio frequency signal received by the antenna and converting the radio frequency signal into a baseband signal;
the CMMB signal receiving unit is used for processing the received baseband signal to obtain CMMB audio and video stream which accords with the CMMB standard and converting the CMMB audio and video stream into CMMB audio and video stream which accords with the interface protocol of the interface unit;
and the interface unit is used for sending the CMMB audio and video stream which accords with the own interface protocol to the processing unit of the receiving terminal.
8. A receiving card according to claim 7, wherein the baseband signal is a digital baseband signal; the CMMB signal receiving unit comprises a channel synchronization module, a demodulation module and a protocol conversion module, wherein,
the signal synchronization module is used for receiving the baseband signals, detecting and extracting the CMMB signals;
the demodulation module is used for demodulating the extracted CMMB signal to obtain CMMB audio and video stream which accords with the CMMB standard;
and the protocol conversion module is used for converting the CMMB audio and video stream which accords with the CMMB standard into the CMMB audio and video stream which accords with the interface protocol of the interface module and sending the CMMB audio and video stream to the processing unit of the receiving terminal through the interface unit.
9. A receiving card according to claim 8, wherein the baseband signal is an analog baseband signal;
the CMMB signal receiving unit also comprises an analog/digital conversion module which is used for converting the received analog baseband signal into a digital baseband signal and sending the digital baseband signal to the signal synchronization module.
10. A receiving card according to claim 8, characterised in that said interface unit comprises an MMIS interface module, or an SPI interface module, or an SDI0 interface module, or an SPI interface module and an SDI0 interface.
11. The receiving card of claim 7, wherein the baseband signal is an analog baseband signal, and the analog baseband signal is an analog low intermediate frequency signal, or an analog zero intermediate frequency signal, or an analog IQ signal;
alternatively, the baseband signal is a digital baseband signal, and the digital baseband signal is a digital low intermediate frequency signal, a digital zero intermediate frequency signal, or a digital baseband IQ signal.
12. A receiving card according to claim 7, wherein the RF signal receiving and converting unit adopts wired or wireless reception.
13. A receiving card according to claim 12, wherein when the rf signal receiving and converting unit employs wireless reception, the antenna is disposed on the receiving card, or an antenna existing in a receiving terminal itself to which the receiving card is applied is utilized.
14. A receiving card according to any one of claims 7 to 13, wherein the receiving card is a Mini secure data storage card Mini SD, a Micro secure data storage card Micro SD, or a wireless network card.
15. A receiving terminal is characterized by at least comprising a receiving card, wherein the receiving card comprises a radio frequency signal receiving and converting unit, a CMMB signal receiving unit and an interface unit; wherein,
the radio frequency signal receiving and converting unit is used for amplifying and filtering the radio frequency signal received by the antenna and converting the radio frequency signal into a baseband signal;
the CMMB signal receiving unit is used for processing the received baseband signal to obtain CMMB audio and video stream which accords with the CMMB standard and converting the CMMB audio and video stream into CMMB audio and video stream which accords with the interface protocol of the interface unit;
and the interface unit is used for sending the CMMB audio and video stream which accords with the own interface protocol to the processing unit of the receiving terminal.
16. The receiving terminal of claim 15, wherein the baseband signal is a digital baseband signal; the CMMB signal receiving unit comprises a channel synchronization module, a demodulation module and a protocol conversion module, wherein,
the signal synchronization module is used for receiving the baseband signals, detecting and extracting the CMMB signals;
the demodulation module is used for demodulating the extracted CMMB signal to obtain CMMB audio and video stream which accords with the CMMB standard;
and the protocol conversion module is used for converting the CMMB audio and video stream which accords with the CMMB standard into the CMMB audio and video stream which accords with the interface protocol of the interface module and sending the CMMB audio and video stream to the processing unit of the receiving terminal through the interface unit.
17. The receiving terminal of claim 16, wherein the baseband signal is an analog baseband signal;
the CMMB signal receiving unit also comprises an analog/digital conversion module which is used for converting the received analog baseband signal into a digital baseband signal and sending the digital baseband signal to the signal synchronization module.
18. The receiving terminal according to any one of claims 15 to 17, wherein the receiving terminal is a notebook computer, a mobile phone, an MP4, a digital camera, a digital video camera, a digital still camera, a GPS navigation device, an automotive multimedia system, a headset with a control function, a headset with a bluetooth function.
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| CN101848347A (en) * | 2009-03-24 | 2010-09-29 | 中兴通讯股份有限公司 | Method for sharing CMMB video and mobile terminal providing sharing service |
| CN101873406A (en) * | 2009-04-24 | 2010-10-27 | 希姆通信息技术（上海）有限公司 | Implementation method of CMMB (China Mobile Multimedia Broadcasting) condition receiving system on mobile terminal |
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| CN201039216Y (en) * | 2007-04-18 | 2008-03-19 | 上海庞米电子信息技术有限公司 | Digital multi-media broadcast receiving and transmission device based on quick card interface |
| CN201171229Y (en) * | 2007-11-26 | 2008-12-24 | 吴湛 | CMMB receiving terminal |
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| CN101848347A (en) * | 2009-03-24 | 2010-09-29 | 中兴通讯股份有限公司 | Method for sharing CMMB video and mobile terminal providing sharing service |
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| CN101848347B (en) * | 2009-03-24 | 2014-03-12 | 中兴通讯股份有限公司 | Method for sharing CMMB video and mobile terminal providing sharing service |
| CN101873406A (en) * | 2009-04-24 | 2010-10-27 | 希姆通信息技术（上海）有限公司 | Implementation method of CMMB (China Mobile Multimedia Broadcasting) condition receiving system on mobile terminal |
| CN102209373A (en) * | 2010-06-25 | 2011-10-05 | 无锡中科龙泽信息科技有限公司 | Power consumption adaptive circuit and method for microSD (micro Secure Digital) wireless access equipment |
| CN102209373B (en) * | 2010-06-25 | 2016-01-20 | 无锡中科龙泽信息科技有限公司 | A kind of power consumption adaptive circuit of microSD type radio reception device and method thereof |
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| CN103112415A (en) * | 2013-01-25 | 2013-05-22 | 广东翼卡车联网服务有限公司 | Communication method of 24LE1 wireless module and wince |
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| CN103112415B (en) * | 2013-01-25 | 2015-07-15 | 广东翼卡车联网服务有限公司 | Communication method of 24LE1 wireless module and wince |
| CN103108038B (en) * | 2013-01-25 | 2015-10-28 | 广东翼卡车联网服务有限公司 | Based on the data transmission method of SD equipment complex and system in car networking |
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| CN101340253B (en) | 2010-05-12 |
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