CN105871392A - Receiver and communication terminal - Google Patents
Receiver and communication terminal Download PDFInfo
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- CN105871392A CN105871392A CN201510703383.3A CN201510703383A CN105871392A CN 105871392 A CN105871392 A CN 105871392A CN 201510703383 A CN201510703383 A CN 201510703383A CN 105871392 A CN105871392 A CN 105871392A
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/06—Receivers
- H04B1/10—Means associated with receiver for limiting or suppressing noise or interference
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G3/00—Gain control in amplifiers or frequency changers
- H03G3/20—Automatic control
- H03G3/22—Automatic control in amplifiers having discharge tubes
- H03G3/26—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise, e.g. squelch systems
- H03G3/28—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise, e.g. squelch systems in frequency-modulation receivers ; in angle-modulation receivers
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- Noise Elimination (AREA)
- Input Circuits Of Receivers And Coupling Of Receivers And Audio Equipment (AREA)
Abstract
The present invention provides a receiver and a communication terminal. The receiver comprises an antenna, a band pass filter, a radio frequency transceiver and a base-band processor which are arranged in order on a signal receiving link. A first low noise amplifier is arranged between the antenna and the radio frequency transceiver and is configured to perform low-noise amplification process of the received signals so as to reduce the noise coefficient of the receiver. The present invention further discloses a communication terminal by using the receiver. The receiver and the communication terminal are able to reduce the noise coefficient in the signal receiving link and improve the signal receiving sensitivity so as to improve the signal processing efficiency and the communication quality of the communication terminal.
Description
Technical field
The present invention relates to communication technical field, particularly relate to a kind of receiver and communication terminal.
Background technology
Along with the development of communication science and technology, the use of communication terminal is more and more universal, interpersonal communication
Exchange also becomes increasingly to facilitate.
In existing communication technology, the receiver (Transceiver) in communication terminal is in communication terminal
One of part of most critical, the sensitivity of receiver directly determines communication terminal and receives the ability of signal,
Thus determine the quality of the communication quality of communication terminal.In prior art, the receiver in communication terminal connects
The link of the collection of letters number includes antenna, band filter (Band Pass Filter；BPF), radio-frequency receiving-transmitting
Letter machine and baseband processor.During receiver receives signal, first by antenna receiving signal, band
The signal received is filtered by bandpass filter, filters the noise outside signal frequency range；Then by penetrating
Frequently transceiver is sent to baseband processor after signal is carried out low noise amplification process and Frequency mixing processing,
Be decoded signal by baseband processor, despreading etc. processes, and is supplied to the signal finally given use
Family.
But, in existing communication technology, in the link of receiver reception signal, noise coefficient is relatively big, thus
The signal receiving sensitivity causing receiver is relatively low.
Summary of the invention
The present invention provides a kind of receiver and communication terminal, to overcome receiver in prior art to receive signal
Link in noise coefficient relatively big, cause the technical problem that the signal receiving sensitivity of receiver is relatively low, with
Realizing the noise coefficient reducing in the link of receiver reception signal, the signal improving receiver receives sensitive
Degree.
The present invention provides a kind of receiver, described receiver include successively on the link that signal receives antenna,
Band filter, RF transceiver and baseband processor；At described antenna and described RF signal receiving and s ending
It is additionally provided with the first low-noise amplifier between machine, puts for the described signal received is carried out low noise
Big process, to reduce the noise coefficient of described receiver.
Still optionally further, in receiver as above, described first low-noise amplifier is arranged on institute
State between band filter and described RF transceiver.
Still optionally further, in receiver as above, described receiver also includes the first switch, institute
State the first switch to be arranged between described antenna and described band filter；Or described switch is arranged on institute
State between band filter and described first low-noise amplifier.
Still optionally further, in receiver as above, described first low-noise amplifier is arranged on institute
State between antenna and described band filter.
Still optionally further, in receiver as above, described receiver also includes second switch, institute
State second switch to be arranged between described antenna and described first low-noise amplifier；Or described switch sets
Put between described first low-noise amplifier and described band filter.
Still optionally further, in receiver as above, described baseband processor, it is additionally operable to detect institute
The signal intensity of the signal received, and judge that whether described signal intensity is more than or equal to described default threshold
Value；And when described signal intensity is more than or equal to described predetermined threshold value, put to described first low noise
Big device sends the first control signal so that described first low-noise amplifier leads directly to.
Still optionally further, in receiver as above, described baseband processor, it is additionally operable to when detection
When described signal intensity to the described signal received is less than described predetermined threshold value, to described first low noise
Amplifier sends the second control signal, closes the straight-through of described first low-noise amplifier.
Still optionally further, in receiver as above, described RF transceiver includes the second low noise
Acoustic amplifier and frequency mixer, and described frequency mixer respectively with described second low-noise amplifier and described base band
Processor communicates to connect.
The present invention also provides for a kind of communication terminal, it is characterised in that the receiver of described communication terminal uses
Arbitrary described receiver.
The receiver of the present invention and communication terminal, wherein receiver wraps on the link that signal receives successively
Include antenna, band filter, RF transceiver and baseband processor；By the sky at receiver
First low-noise amplifier is set between line and RF transceiver, for carrying out the signal received
Low noise amplification processes, to reduce the noise coefficient in signal reception link, it is possible to solve prior art
In receiver to receive noise coefficient in the link of signal relatively big, cause signal receiving sensitivity relatively low
Technical problem, thus realize reducing signal and receive the noise coefficient in link, reduce the spirit that signal receives
Sensitivity value, thus improve the sensitivity that signal receives.And the communication terminal of the present invention, on using
State receiver, it is also possible to reduce the noise coefficient of communication terminal, improve communication terminal and receive the spirit of signal
Sensitivity, improves the efficiency that communication terminal signals processes, and improves the communication quality of communication terminal.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality
Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that under,
Accompanying drawing during face describes is some embodiments of the present invention, for those of ordinary skill in the art,
On the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
Fig. 1 is the structural representation of receiver one embodiment of the present invention.
Fig. 2 is the structural representation of another embodiment of receiver of the present invention.
Fig. 3 is the structural representation of the receiver another embodiment of the present invention.
Fig. 4 is the structural representation of the another embodiment of receiver of the present invention.
Fig. 5 is the structural representation of the receiver still another embodiment of the present invention.
Fig. 6 is the structural representation of the receiver another embodiment of the present invention.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with this
Accompanying drawing in bright embodiment, is clearly and completely described the technical scheme in the embodiment of the present invention,
Obviously, described embodiment is a part of embodiment of the present invention rather than whole embodiments.Based on
Embodiment in the present invention, those of ordinary skill in the art are obtained under not making creative work premise
The every other embodiment obtained, broadly falls into the scope of protection of the invention.
Fig. 1 is the structural representation of receiver one embodiment of the present invention.As it is shown in figure 1, this enforcement
The receiver of example includes antenna 11, BPF 12, RF transceiver on the link that signal receives successively
On 13 and baseband processor 14, and the link that receives of this signal, antenna 11, BPF 12, radio frequency are received
Sender 13 and baseband processor 14 communicate to connect successively.Wherein at antenna 11 and radio-frequency receiving-transmitting
The first low-noise amplifier (Low Noise Amplifier it is additionally provided with between letter machine 13；LNA) 15,
Oneth LNA15 is for carrying out low noise amplification process to the signal received, to reduce receiver
Signal receive the noise coefficient in link.The such as receiver shown in Fig. 1 sets with a LNA15
As a example by putting between BPF12 and RF transceiver 13.
In the present embodiment, BPF11 specifically can use surface acoustic wave (Surface Acoustic Wave；
SAW) wave filter realizes.
The receiver of the present embodiment, receives on link at signal, and antenna 11 is used for receiving signal；BPF12
After being positioned at antenna 11, BPF12 is filtered for the signal receiving antenna 11, filters signal
Noise outside the frequency band range at place；After oneth LNA15 is positioned at BPF12, a LNA15
Signal after filtering is carried out low noise amplification process；RF transceiver 13 is positioned at first
After LNA15, the signal after processing low noise amplification processes, finally by baseband processor
Signal after 14 pairs of RF transceivers 13 process is decoded, despreading etc. processes, and completes signal
Reception process.
The receiver of the present embodiment is on the link that signal receives, and the sensitivity receiving signal can use
Equation below (1) represents:
Sensitivity=thermal noise power spectrum density+10 × lg (the subcarrier spacing)+noise coefficient of reception signal+
Demodulation threshold+10 × lg (needing sub-carrier number) (1)
Wherein, thermal noise power spectrum density can be-174dBm/Hz, and subcarrier spacing is 15KHz,
Demodulation threshold is also certain.Sub-carrier number is needed generally to be distributed by base station, at needs sub-carrier number
In the case of determining, the sensitivity during therefore the signal of receiver receives link depends on that whole signal receives
Noise coefficient on link.
The noise coefficient cascading equations that the signal of the receiver of the present embodiment receives in link can be expressed as
Equation below (2):
Wherein NFsysSignal for receiver receives the noise coefficient in link；NFLNA1It is a LNA15
Noise coefficient value be about 1dB, NFBPFInsertion Loss for BPF12；And the BPF12 of each producer
Insertion Loss is more or less the same, and value is about 2.5dB.GLNA1Being the gain of a LNA15, value is
About 12dB；NFTransceiverBeing the noise coefficient of RF transceiver 13, value is about 2.5dB.
And in Fig. 1, the receiver corresponding when the being not provided with a LNA15 i.e. receiver of prior art
Structure, now the signal of this receiver receive the noise coefficient cascading equations in link can be expressed as
Lower formula (3):
NFsys≈NFBPF+NFTransceiver (3)
Each parameter value, with reference to the record of previous embodiment, does not repeats them here.
The signal of the receiver of the present embodiment is received the noise coefficient cascading equations (2) in link, with
The signal of the receiver of above-mentioned prior art receives the cascading equations (3) of the noise coefficient in link to be carried out
Contrast, is appreciated that the signal of the receiver of the present embodiment receives the cascade public affairs of the noise coefficient in link
The noise coefficient of formula (2) gained is less.Therefore the signal of the receiver of the present embodiment is received in link
The noise coefficient of cascading equations (2) gained of noise coefficient, substitute into receiver and receive the sensitive of signal
In the formula (1) of degree, so that the numerical value that signal receives the sensitivity in link is less, thus improve
The sensitivity that signal receives.Therefore by increasing by a LNA15 in the present embodiment, to reduce receiver
Signal receive the noise coefficient in link such that it is able to reduce the Sensitirity va1ue that signal receives, thus
Improve the sensitivity that signal receives.
The receiver of the present embodiment, only includes antenna 11, BPF 12, RF transceiver with traditional
13 and baseband processor 14 constitute receiver compare, by BPF12 and RF transceiver
Increase by a LNA15 between 13, owing to noise coefficient is to receive in link each according to whole signal
The cascade connection of assembly obtains, by increasing by first in the link of receiver reception signal
LNA15, just can reduce signal and receive the noise coefficient in link, reduce the sensitivity that signal receives
Value, thus improve the sensitivity that signal receives.
Fig. 2 is the structural representation of another embodiment of receiver of the present invention.As in figure 2 it is shown, this reality
Execute the receiver of example on the basis of the technical scheme of above-mentioned embodiment illustrated in fig. 1, the most detailed
Carefully introduce technical scheme.
As in figure 2 it is shown, RF transceiver 13 in the present embodiment can include the 2nd LNA13a
With frequency mixer 13b, after the 2nd LNA13a is positioned at a LNA15, communicate with a LNA15
Connect；Frequency mixer 13b communicates to connect with a LNA15 and baseband processor 14 respectively.Second
LNA13a processes for signal carries out second time low noise amplification, and frequency mixer 13b is positioned at second
After LNA13a, frequency mixer 13b is after processing second time low noise amplification according to baseband frequency
Signal carry out Frequency mixing processing, finally by baseband processor 14, the signal after mixing is decoded,
Despreadings etc. process, and the reception completing signal processes.
It is real with reference to shown in above-mentioned Fig. 1 that the signal of the receiver of the present embodiment receives the noise coefficient in link
Execute the formula (2) of example；And in Fig. 2, the receiver corresponding when being not provided with a LNA15 is the most existing
Having the receiver structure of technology, the noise coefficient during now the signal of this receiver receives link is with reference to upper
Stating the formula (3) in embodiment illustrated in fig. 1, the present embodiment repeats no more.In like manner, the present embodiment
Receiver, compared with prior art, so that the numerical value that signal receives the sensitivity in link is less,
Thus improve the sensitivity that signal receives.
Still optionally further, in the receiver of the present embodiment, baseband processor 14 is additionally operable to detect institute
The signal intensity of the signal received, and judge that whether signal intensity is more than or equal to predetermined threshold value；And
When signal intensity is more than or equal to predetermined threshold value, send the first control signal to a LNA15,
A LNA15 is made to lead directly to.In the present embodiment, a LNA15 is made to lead directly to, even if first
LNA15Bypass, is i.e. equivalent to LNA15 direct short-circuit in signal receives link, no
The signal received is carried out low noise amplification process.In the present embodiment, baseband processor 14 is to first
The first control signal that LNA15 sends can be a universal input output (General Purpose
Input Output；GPIO) control signal, this first control signal is one and enables signal, it is possible to
Oneth LNA15 is enabled, makes a LNA15 lead directly to.Predetermined threshold value in the present embodiment can be
The signal minimum standards value that receiver can receive, when the intensity of the signal received by receiver is low
When this predetermined threshold value, the signal quality of reception it would appear that problem, such as, causes the signal cannot be normal
Decoding etc..Therefore, in the present embodiment, when receiver is positioned at cell edge when, Base-Band Processing
Device 14 detects that the signal intensity of received signal can be less, when this signal intensity is less than presetting threshold
During value, signal now receives the receiver on link and uses structure as shown in Figure 2, due to now
Signal intensity is less, and a LNA15 receives at signal, on link, the signal received carried out low noise
Processing and amplifying, can strengthen the intensity of the signal that baseband processor 14 receives, and improves receiver and connects
The sensitivity of the collection of letters number.
And when receiver is when cell edge is mobile to centre, community, and now signal intensity gradually strengthens, if
Oneth LNA15 continues signal is carried out low noise amplification process, can increase the noise of signal, thus increase
Signal receives the obstruction of signal in link, therefore, when baseband processor 14 detects received signal
When signal intensity is more than or equal to predetermined threshold value, send the first control signal to a LNA15, make the
One LNA15 leads directly to, even if a LNA15Bypass, now a LNA15 receives link at signal
Middle direct short-circuit, does not carries out low noise amplification process to the signal received, and signal can be avoided to receive chain
The obstruction of signal in road.And when receiver is by when turning again to cell edge in the middle of community, work as Base-Band Processing
When device 14 detects the signal intensity of received signal less than predetermined threshold value, baseband processor 14 is to the
One LNA15 sends the second control signal, closes the straight-through of a LNA15, a now LNA15
Again working in signal receives link, corresponding signal receives link as shown in Figure 2.This second control
Signal processed is also one and enables signal, it is possible to enable a LNA15, makes a LNA15 close straight
Logical.
Receiver in the present embodiment is strong by being detected the signal of received signal by baseband processor 14
Degree, and judge that whether signal intensity is more than or equal to predetermined threshold value；And when signal intensity more than or etc.
When i.e. signal intensity is preferable for predetermined threshold value, baseband processor 14 sends the first control to a LNA15
Signal, makes a LNA15 lead directly to, and signal is not received the signal low noise amplification in link and processes, keeps away
Exempt from the obstruction of signal.And when signal intensity received signal being detected is strong less than predetermined threshold value i.e. signal
When spending bad, baseband processor 14 sends the second control signal to a LNA15, closes a LNA15
Straight-through, now by a LNA15, signal is received signal in link and carries out low noise amplification process, increase
The intensity of the signal that strong basis provided with processor 14 receives, improves receiver and receives the sensitivity of signal.
It should be noted that at time division duplex (Time Division Duplexing；TDD) logical
In letter technology, receiver is possible not only to for receiving signal, it is also possible to be used for sending letter as transmitter
Number.In previous time slot, such as receive signal, later time slot sends signal；Or it is previous
Individual time slot sends signal, and later time slot receives signal.Fig. 3 is that the receiver of the present invention is further implemented
The structural representation of example.As it is shown on figure 3, cutting flexibly for the function that ensures receiver and transmitter
Changing, the receiver of the present embodiment, on the basis of the technical scheme of above-mentioned embodiment illustrated in fig. 2, also may be used
To be provided with the first switch 16, such as in the present embodiment, this first switch 16 can be arranged on antenna 11
And between BPF12.Such as in tdd communication system, can be real by arranging this first switch 16
Now send signal and the switching receiving signal.In actual application, this first switch 16 can also be arranged
Between BPF12 and a LNA15, it realizes principle and is similar to, and does not repeats them here.
Now, the noise coefficient cascading equations during the signal of the receiver of the present embodiment receives link is permissible
It is expressed as formula (4):
Wherein NFSWThe Insertion Loss of the first switch 16 represented, the note of other parameter reference previous embodiment
Carry, do not repeat them here.
And when, in the receiver structure of prior art, being also equipped with this first switch 16, now this reception
The signal of machine receives the noise coefficient cascading equations in link can be expressed as formula (5):
NFsys≈NFSW+NFBPF+NFTransceiver (5)
And the first switch 16 and BPF12 Insertion Loss of each producer are more or less the same.In like manner, with reference to above-mentioned
The correlation analysis of embodiment illustrated in fig. 1, is appreciated that and the signal of the receiver of the present embodiment is received chain
Noise coefficient cascading equations (4) in road, receives chain with the signal of the receiver of corresponding prior art
The cascading equations (5) of the noise coefficient in road contrasts, and is appreciated that the receiver of the present embodiment
The noise coefficient of signal cascading equations (4) gained that receives noise coefficient in link less.Therefore
By cascading equations (4) gained of the noise coefficient in the signal reception link of the receiver of the present embodiment
Noise coefficient substitutes in the formula (1) of the sensitivity that receiver receives signal, so that signal receives
The numerical value of the sensitivity in link is less, thus improves the sensitivity that signal receives.And through experimental data
Proving, the receiver of the present embodiment, compared with the receiver of prior art, can improve about 1dB
Sensitivity.
Fig. 4 is the structural representation of the another embodiment of receiver of the present invention.As shown in Figure 4, this reality
The difference executing the receiver of example and the receiver of embodiment illustrated in fig. 1 is: the present embodiment is with at antenna
As a example by arranging a LNA15 between 11 and BPF12, accordingly, the receiver of the present embodiment exists
Antenna the 11, the oneth LNA15, BPF 12, RF signal receiving and s ending is included successively on the link that signal receives
Machine 13 and baseband processor 14, and this signal receive link on antenna the 11, the oneth LNA15,
BPF 12, RF transceiver 13 and baseband processor 14 communicate to connect successively.Oneth LNA15
For the signal received is carried out low noise amplification process, to reduce the signal reception link of receiver
In noise coefficient.Remaining structure is identical with above-mentioned embodiment illustrated in fig. 1, is referred to above-mentioned in detail
The record of embodiment illustrated in fig. 1, does not repeats them here.
The receiver of the present embodiment, receives on link at signal, and antenna 11 is used for receiving signal；The
After one LNA15 is positioned at antenna 11, the signal that antenna 11 is received by a LNA15 carries out low noise
Sound processing and amplifying；After BPF12 is positioned at a LNA15, BPF12 is for low to a LNA15
Signal after noise processing and amplifying is filtered, and filters the noise outside the frequency band range at signal place；
After RF transceiver 13 is positioned at BPF12, to filtering after signal process, finally by
Signal after RF transceiver 13 process is decoded by baseband processor 14, despreading etc. processes,
The reception completing signal processes.
Owing to noise coefficient is to receive the cascade connection of each assembly in link according to whole signal to obtain
, and the moon is the biggest on the impact of noise coefficient near the device of source location, such as first order device
Impact on noise coefficient is maximum, and afterbody device is minimum on the impact of noise coefficient.Such as this reality
Execute the noise coefficient that in example, the signal of receiver is received in link by a LNA15 and play mastery reaction,
And RF transceiver 13 receives the noise coefficient role in link to the signal of receiver
Little.Therefore, compared with embodiment described in above-mentioned Fig. 1, in the present embodiment, a LNA15 is arranged
Closer to antenna 11, thus more reduce signal and receive the noise coefficient in link such that it is able to enter
One step improves the sensitivity that signal receives.
The noise coefficient cascading equations that the signal of the receiver of the present embodiment receives in link can be expressed as
Equation below (6):
The record of each parameter reference above-described embodiment, does not repeats them here.
The signal of the receiver of the present embodiment receives the noise coefficient (6) in link and above-mentioned Fig. 1 institute
Show that the noise coefficient (2) that the signal of the receiver in embodiment receives in link is compared, noise coefficient
Less.Therefore compared with the receiver of embodiment illustrated in fig. 1, by the signal of the receiver of the present embodiment
The noise coefficient of cascading equations (6) gained receiving the noise coefficient in link substitutes into receiver and receives letter
Number sensitivity formula (1) in so that the numerical value that signal receives the sensitivity in link is less,
Thus improve the sensitivity that signal receives.And prove through experimental data, the receiver of the present embodiment with
The receiver of prior art is compared, and can improve the sensitivity of about 3dB.
The receiver of the present embodiment, by increasing by a LNA15 between antenna 11 and BPF12,
Owing to noise coefficient is to receive the cascade connection of each assembly in link according to whole signal to obtain, logical
Cross in receiver receives the link of signal, increase by a LNA15, just can reduce signal and receive link
In noise coefficient, improve signal receive sensitivity.
Fig. 5 is the structural representation of the receiver still another embodiment of the present invention.As it is shown in figure 5, this
The receiver of embodiment is on the basis of the technical scheme of above-mentioned embodiment illustrated in fig. 4, the most more
Introduce technical scheme in detail.
As it is shown in figure 5, the receiver of the present embodiment is in the technical scheme of above-mentioned embodiment illustrated in fig. 4
On the basis of, use the structure of the RF transceiver 13 shown in Fig. 2, the i.e. receiver of the present embodiment
The 2nd LNA13a and frequency mixer 13b can be included in 13, be referred to shown in above-mentioned Fig. 2 real in detail
Execute the structure of example, do not repeat them here.
It is real with reference to shown in above-mentioned Fig. 4 that the signal of the receiver of the present embodiment receives the noise coefficient in link
Execute the formula (6) of example；And in Fig. 5, the receiver corresponding when being not provided with a LNA15 is the most existing
Having the receiver structure of technology, the noise coefficient during now the signal of this receiver receives link is with reference to upper
Stating the formula (3) in embodiment illustrated in fig. 1, the present embodiment repeats no more.In like manner, the present embodiment
Receiver, compared with prior art, so that the numerical value that signal receives the sensitivity in link is less,
Thus improve the sensitivity that signal receives.
In like manner, as it is shown in figure 5, still optionally further, in the receiver of the present embodiment, Base-Band Processing
Device 14 is additionally operable to detect the signal intensity of received signal, and judge signal intensity whether more than or
Person is equal to predetermined threshold value；And when signal intensity is more than or equal to predetermined threshold value, to a LNA15
Send the first control signal, make a LNA15 lead directly to.In like manner, in the present embodiment, make a LNA15
Straight-through, even if a LNA15Bypass, be i.e. equivalent to a LNA15 in signal receives link
Direct short-circuit, does not carries out low noise amplification process to the signal received.Base-Band Processing in the present embodiment
Device 14 can be a GPIO control signal to the first control signal that a LNA15 sends, should
First control signal is one and enables signal, it is possible to enables a LNA15, makes a LNA15
Straight-through.The signal minimum standards that predetermined threshold value in the present embodiment can be able to receive for receiver
Value, when the intensity of the signal received by receiver is less than this predetermined threshold value, the signal quality of reception
It would appear that problem, such as, cause the signal cannot normal decoder etc..Therefore, in the present embodiment, when
The when that receiver being positioned at cell edge, baseband processor 14 detects the signal of received signal
Intensity can be less, and when this signal intensity is less than predetermined threshold value, signal now receives connecing on link
Receipts machine uses structure as shown in Figure 2, and owing to now signal intensity is less, a LNA15 is at letter
Number receive and the signal received to be carried out low noise amplification process on link, baseband processor 14 can be strengthened
The intensity of the signal received, improves receiver and receives the sensitivity of signal.
And when receiver is when cell edge is mobile to centre, community, and now signal intensity gradually strengthens, if
Oneth LNA15 continues signal is carried out low noise amplification process, can increase the noise of signal, thus increase
Signal receives the obstruction of signal in link, therefore, when baseband processor 14 detects received signal
When signal intensity is more than or equal to predetermined threshold value, send the first control signal to a LNA15, make the
One LNA15 leads directly to, even if a LNA15Bypass, now a LNA15 receives link at signal
Middle direct short-circuit, does not carries out low noise amplification process to the signal received, and signal can be avoided to receive chain
The obstruction of signal in road.And when receiver is by when turning again to cell edge in the middle of community, work as Base-Band Processing
When device 14 detects the signal intensity of received signal less than predetermined threshold value, baseband processor 14 is to the
One LNA15 sends the second control signal, closes the straight-through of a LNA15, a now LNA15
Again working in signal receives link, corresponding signal receives link as shown in Figure 2.This second control
Signal processed is also one and enables signal, it is possible to enable a LNA15, makes a LNA15 close straight
Logical.
Receiver in the present embodiment is strong by being detected the signal of received signal by baseband processor 14
Degree, and judge that whether signal intensity is more than or equal to predetermined threshold value；And when signal intensity more than or etc.
When i.e. signal intensity is preferable for predetermined threshold value, baseband processor 14 sends the first control to a LNA15
Signal, makes a LNA15 lead directly to, and signal is not received the signal low noise amplification in link and processes, keeps away
Exempt from the obstruction of signal.And when signal intensity received signal being detected is strong less than predetermined threshold value i.e. signal
When spending bad, baseband processor 14 sends the second control signal to a LNA15, closes a LNA15
Straight-through, now by a LNA15, signal is received signal in link and carries out low noise amplification process, increase
The intensity of the signal that strong basis provided with processor 14 receives, improves receiver and receives the sensitivity of signal.
Fig. 6 is the structural representation of the receiver another embodiment of the present invention.As shown in Figure 6, this reality
Execute the receiver of example on the basis of the technical scheme of above-mentioned embodiment illustrated in fig. 5, the most in further detail
Introduce technical scheme.
In order at time division duplex (Time Division Duplexing；TDD) communication technology makes
With the receiver of the present embodiment, it is also possible to arrange second switch 17 between antenna 11 and a LNA15.
As shown in Figure 6, in the present embodiment, with second switch 17 is arranged on antenna 11 and a LNA15 it
As a example by between.
The noise coefficient cascading equations that the signal of the present embodiment receiver receives in link can be expressed as
Formula (7):
The second switch 17 of the present embodiment can use first with above-mentioned embodiment illustrated in fig. 3 to switch
16 identical switch, wherein NFSWThe Insertion Loss of the second switch 17 that can also represent, other ginsengs
Number, with reference to the record of previous embodiment, does not repeats them here.
In like manner, the noise coefficient (7) during the signal of the receiver of the present embodiment receives link is with above-mentioned
The noise coefficient (5) that the signal of the receiver in embodiment illustrated in fig. 3 receives in link is compared, and makes an uproar
Sonic system number is less.Therefore compared with the receiver of embodiment illustrated in fig. 3, by the receiver of the present embodiment
The noise coefficient of signal cascading equations (7) gained that receives noise coefficient in link substitute into receiver
In the formula (1) of the sensitivity receiving signal, so that signal receives the numerical value of the sensitivity in link
Less, thus improve the sensitivity that signal receives.And prove through experimental data, connecing of the present embodiment
Receipts machine, compared with the receiver of prior art, can improve the sensitivity of about 3dB.
Alternatively, in the receiver of the present embodiment, second switch 17 can also be arranged on a LNA15
And between BPF12, now a LNA15 is arranged between antenna 11 and second switch 17.And
The receiver of the present invention above-mentioned Fig. 1-Fig. 6 any embodiment all goes in tdd communication system
Reception link on.
The present invention also provides for a kind of communication terminal, and the receiver employing such as figure 1 above of the communication terminal of the present invention-
The receiver of Fig. 6 any embodiment, is referred to the record of above-described embodiment in detail, does not repeats them here.
The communication go side of the present invention, by using the receiver of above-described embodiment, can reduce receiver
Noise coefficient, improve the sensitivity that signal receives, thus reduce the noise coefficient of communication terminal, carry
The sensitivity of high communication terminal received signals, improves the efficiency that communication terminal signals processes, improves communication
The communication quality of terminal.
Device embodiment described above is only schematically, the list wherein illustrated as separating component
Unit can be or may not be physically separate, and the parts shown as unit can be or also
Can not be physical location, i.e. may be located at a place, or at least two network can also be distributed to
On unit.Some or all of module therein can be selected according to the actual needs to realize the present embodiment
The purpose of scheme.Those of ordinary skill in the art are not in the case of paying performing creative labour, the most permissible
Understand and implement.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, rather than right
It limits；Although the present invention being described in detail with reference to foregoing embodiments, this area common
Skilled artisans appreciate that the technical scheme described in foregoing embodiments still can be modified by it,
Or the most some or all of technical characteristic is carried out equivalent；And these amendments or replacement, and
The essence not making appropriate technical solution departs from the scope of various embodiments of the present invention technical scheme.
Claims (9)
1. a receiver, described receiver includes the logical filter of antenna, band on the link that signal receives successively
Ripple device, RF transceiver and baseband processor；It is characterized in that, at described antenna and described radio frequency
The first low-noise amplifier it is additionally provided with, for carrying out low to the described signal received between transceiver
Noise processing and amplifying, to reduce the noise coefficient of described receiver.
Receiver the most according to claim 1, it is characterised in that described first low-noise amplifier
It is arranged between described band filter and described RF transceiver.
Receiver the most according to claim 2, it is characterised in that described receiver also includes first
Switch, described first switch is arranged between described antenna and described band filter；Or described switch
It is arranged between described band filter and described first low-noise amplifier.
Receiver the most according to claim 1, it is characterised in that described first low-noise amplifier
It is arranged between described antenna and described band filter.
Receiver the most according to claim 4, it is characterised in that described receiver also includes second
Switch, described second switch is arranged between described antenna and described first low-noise amplifier；Or institute
State switch to be arranged between described first low-noise amplifier and described band filter.
6. according to the arbitrary described receiver of claim 1-5, it is characterised in that described baseband processor,
Be additionally operable to detect the signal intensity of received signal, and judge described signal intensity whether more than or etc.
In described predetermined threshold value；And when described signal intensity is more than or equal to described predetermined threshold value, to described
First low-noise amplifier sends the first control signal so that described first low-noise amplifier leads directly to.
Receiver the most according to claim 6, it is characterised in that described baseband processor, also uses
In when the described signal intensity of described signal of reception being detected less than described predetermined threshold value, to described the
One low-noise amplifier sends the second control signal, closes the straight-through of described first low-noise amplifier.
8. according to the arbitrary described receiver of claim 1-5, it is characterised in that described RF signal receiving and s ending
Machine includes the second low-noise amplifier and frequency mixer, and described frequency mixer is put with described second low noise respectively
Big device and the communication connection of described baseband processor.
9. a communication terminal, it is characterised in that the receiver of described communication terminal uses as above right to want
Seek the arbitrary described receiver of 1-8.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510703383.3A CN105871392A (en) | 2015-10-26 | 2015-10-26 | Receiver and communication terminal |
| PCT/CN2016/086807 WO2017071261A1 (en) | 2015-10-26 | 2016-06-23 | Receiver and communication terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510703383.3A CN105871392A (en) | 2015-10-26 | 2015-10-26 | Receiver and communication terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105871392A true CN105871392A (en) | 2016-08-17 |
Family
ID=56624202
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510703383.3A Pending CN105871392A (en) | 2015-10-26 | 2015-10-26 | Receiver and communication terminal |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105871392A (en) |
| WO (1) | WO2017071261A1 (en) |
Cited By (3)
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| CN107689812A (en) * | 2017-08-31 | 2018-02-13 | 广东欧珀移动通信有限公司 | Radio-frequency front-end module, mobile terminal and signal processing method |
| CN108282173A (en) * | 2018-02-28 | 2018-07-13 | 北京小米移动软件有限公司 | Method for receiving and processing signal and device |
| CN108880652A (en) * | 2018-06-01 | 2018-11-23 | 四川斐讯信息技术有限公司 | A kind of adjust automatically receives the method and system of power |
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| CN108880652A (en) * | 2018-06-01 | 2018-11-23 | 四川斐讯信息技术有限公司 | A kind of adjust automatically receives the method and system of power |
Also Published As
| Publication number | Publication date |
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| WO2017071261A1 (en) | 2017-05-04 |
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Application publication date: 20160817 |