CN105897284A - Receiver and communication terminal - Google Patents
Receiver and communication terminal Download PDFInfo
- Publication number
- CN105897284A CN105897284A CN201510703279.4A CN201510703279A CN105897284A CN 105897284 A CN105897284 A CN 105897284A CN 201510703279 A CN201510703279 A CN 201510703279A CN 105897284 A CN105897284 A CN 105897284A
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- Prior art keywords
- signal
- receiver
- low
- noise
- link
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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
-
- 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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
Abstract
The invention provides a receiver and a communication terminal. The receiver of the invention orderly comprises an antenna, a band pass filter, radio frequency transceiver and a base-band processor on a signal receiving link. A first low noise amplifier is arranged between the antenna and the radio frequency transceiver and is used for subjecting received signals to low noise amplifying operation, a noise coefficient of the receiver can be lowered, the base-band processor is used for sending a first control signal to the first low noise amplifier when signal intensity of the received signals is greater than or equal to a preset threshold value, and therefore a straight-through property of the first low noise amplifier can be realized. The invention also discloses the communication terminal which employs the above receiver. According to the receiver and the communication terminal, a noise coefficient of the signal receiving link can be lowered via adoption of the receiver, signal reception sensitivity can be improved, signal processing efficiency of the communication terminal can be improved, and communication quality of the communication terminal can be improved.
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 the 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, bandpass filter (Band Pass Filter；BPF), radio-frequency receiving-transmitting
Letter machine and BBP.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 BBP after signal is carried out low noise amplification process and Frequency mixing processing,
Be decoded signal by BBP, despreading etc. processes, and is supplied to the signal finally given use
Family.
But, in the 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,
Bandpass filter, RF transceiver and BBP；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；
And described BBP, for detecting the signal strength signal intensity of received signal, and judge described letter
Whether number intensity is more than or equal to described predetermined threshold value；And when described signal strength signal intensity is more than or equal to institute
When stating predetermined threshold value, send the first control signal to described first low-noise amplifier so that described first
Low-noise amplifier leads directly to.
Still optionally further, in receiver as above, described BBP, it is additionally operable to when detection
When described signal strength 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 first low-noise amplifier is arranged on institute
State between bandpass 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 bandpass filter；Or described switch is arranged on institute
State between bandpass 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 bandpass 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 bandpass filter.
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, bandpass filter, RF transceiver and BBP；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.Meanwhile, at the base band in the receiver of the present invention
Reason device is additionally operable to when judging the signal strength signal intensity received more than or equal to predetermined threshold value, to the first low noise
Acoustic amplifier sends the first control signal, makes the first low-noise amplifier lead directly to, thus is ensureing signal
While the sensitivity received, it is also possible to the obstruction of anti-stop signal.Therefore the communication terminal of the present invention,
By using above-mentioned receiver, it is also possible to reduce the noise coefficient of communication terminal, improve communication terminal and connect
The sensitivity of the collection of letters number, is possible to prevent the obstruction of signal simultaneously, improves the effect that communication terminal signals processes
Rate, 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 BBP 14, and the link that receives of this signal, antenna 11, BPF 12, radio frequency are received
Sender 13 and BBP 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 BBP
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.
It addition, in the receiver of the present embodiment, BBP 14 is used for detecting received signal
Signal strength signal intensity, and judge that signal strength signal intensity is whether more than or equal to predetermined threshold value；And work as signal strength signal intensity
During more than or equal to predetermined threshold value, send the first control signal to a LNA15, make first
LNA15 leads directly to.In the present embodiment, a LNA15 is made to lead directly to, though a LNA15Bypass,
I.e. be equivalent to LNA15 direct short-circuit in signal receives link, the signal received do not entered
Row low noise amplification processes.Such as in the present embodiment, BBP 14 sends to a LNA15
First control signal 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 a LNA15
Enable, make a LNA15 lead directly to.Predetermined threshold value in the present embodiment can be able to connect for receiver
The signal minimum standard value received, when the intensity of the signal received by receiver is less than this predetermined threshold value
Time, the signal quality of reception it would appear that problem, such as, causes the signal cannot normal decoder etc..Cause
This, in the present embodiment, when receiver is positioned at cell edge when, BBP 14 detects
The signal strength signal intensity of received signal can be less, when this signal strength signal intensity is less than predetermined threshold value, now
Signal receives the receiver on link and uses structure as shown in Figure 1, owing to now signal strength signal intensity is less,
Oneth LNA15 receives at signal, on link, the signal received is carried out low noise amplification process, permissible
Strengthen the intensity of the signal that BBP 14 receives, improve receiver and receive the sensitivity of signal.
And when receiver is when cell edge is mobile to centre, community, and now signal strength signal intensity gradually strengthens,
If a LNA15 continues signal is carried out low noise amplification process, the noise of signal can be increased, from
And increase signal and receive the obstruction of signal in link, therefore, connect when BBP 14 detects
When the signal strength signal intensity of the signal received is more than or equal to predetermined threshold value, send first to a LNA15
Control signal, makes a LNA15 lead directly to, though a LNA15Bypass, now a LNA15
Direct short-circuit in signal receives link, does not carries out low noise amplification process to the signal received, can
To avoid signal to receive the obstruction of signal in link.
The receiver of the present embodiment, only includes antenna 11, BPF 12, RF transceiver with traditional
13 and BBP 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.Meanwhile, the receiver of the present embodiment, at base band
Reason device 14 is additionally operable to when judging the signal strength signal intensity received more than or equal to predetermined threshold value, to first
LNA15 sends the first control signal, makes a LNA15 lead directly to, thus is ensureing what signal received
While sensitivity, it is also possible to the obstruction of anti-stop signal.
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 BBP 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 BBP 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.
And in the present embodiment, 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 strength signal intensity of received signal less than predetermined threshold value, BBP 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 BBP 14
Degree, and judge that whether signal strength signal intensity is more than or equal to predetermined threshold value；And when signal strength signal intensity more than or etc.
When i.e. signal strength signal intensity is preferable for predetermined threshold value, BBP 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 strength signal intensity received signal being detected is strong less than predetermined threshold value i.e. signal
When spending bad, BBP 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 the structural representation of the receiver another embodiment of the present invention.As it is shown on figure 3, in order to
Ensureing the flexible switching of the function of receiver and transmitter, the receiver of the present embodiment is in above-mentioned Fig. 2 institute
On the basis of showing the technical scheme of embodiment, it is also possible to be provided with first switch 16, such as the present embodiment
In this first switch 16 can be arranged between antenna 11 and BPF12.Such as in TDD communication system
In system, by arranging the switching that this first switch 16 can realize sending signal with receiving signal.Real
In the application of border, this first switch 16 can also be arranged between BPF12 and a LNA15, in fact
Existing principle 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 BBP 14, and this signal receive link on antenna the 11, the oneth LNA15,
BPF 12, RF transceiver 13 and BBP 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 amplification processes；After BPF12 is positioned at a LNA15, BPF12 is for low to a LNA15
Signal after noise amplification processes 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 BBP 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 leading role,
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 strength signal intensity of received signal, and judge signal strength signal intensity whether more than or
Person is equal to predetermined threshold value；And when signal strength 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 standard 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, BBP 14 detects the signal of received signal
Intensity can be less, and when this signal strength 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 strength 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, BBP 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 strength 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 BBP 14 detects received signal
When signal strength 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 strength signal intensity of received signal less than predetermined threshold value, BBP 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 BBP 14
Degree, and judge that whether signal strength signal intensity is more than or equal to predetermined threshold value；And when signal strength signal intensity more than or etc.
When i.e. signal strength signal intensity is preferable for predetermined threshold value, BBP 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 strength signal intensity received signal being detected is strong less than predetermined threshold value i.e. signal
When spending bad, BBP 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) the 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 (8)
1. a receiver, described receiver includes the logical filter of antenna, band on the link that signal receives successively
Ripple device, RF transceiver and BBP；It is characterized in that, at described antenna and described radio frequency
The first low-noise amplifier it is additionally provided with, for the signal received is carried out low noise between transceiver
Amplification processes, to reduce the noise coefficient of described receiver；
And described BBP, for detecting the signal strength signal intensity of received signal, and judge described letter
Whether number intensity is more than or equal to described predetermined threshold value；And when described signal strength signal intensity is more than or equal to institute
When stating predetermined threshold value, send the first control signal to described first low-noise amplifier so that described first
Low-noise amplifier leads directly to.
Receiver the most according to claim 1, it is characterised in that described BBP, also uses
In when the described signal strength 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.
Receiver the most according to claim 1 and 2, it is characterised in that described first low noise is put
Big device is arranged between described bandpass filter and described RF transceiver.
Receiver the most according to claim 3, it is characterised in that described receiver also includes first
Switch, described first switch is arranged between described antenna and described bandpass filter；Or described switch
It is arranged between described bandpass filter and described first low-noise amplifier.
Receiver the most according to claim 1 and 2, it is characterised in that described first low noise is put
Big device is arranged between described antenna and described bandpass filter.
Receiver the most according to claim 5, 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 bandpass filter.
7. according to the receiver described in claim 1,2,4 or 6, it is characterised in that described radio frequency is received
Sender includes the second low-noise amplifier and frequency mixer, and described frequency mixer respectively with described second low noise
Acoustic amplifier and the communication connection of described BBP.
8. 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 1-7.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510703279.4A CN105897284A (en) | 2015-10-26 | 2015-10-26 | Receiver and communication terminal |
| PCT/CN2016/087043 WO2017071264A1 (en) | 2015-10-26 | 2016-06-24 | Receiver and communication terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510703279.4A CN105897284A (en) | 2015-10-26 | 2015-10-26 | Receiver and communication terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105897284A true CN105897284A (en) | 2016-08-24 |
Family
ID=57001996
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510703279.4A Pending CN105897284A (en) | 2015-10-26 | 2015-10-26 | Receiver and communication terminal |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN105897284A (en) |
| WO (1) | WO2017071264A1 (en) |
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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 |
| CN107769814A (en) * | 2017-09-26 | 2018-03-06 | 广东欧珀移动通信有限公司 | Lift circuit, mobile terminal and the signal processing method of main collection receiving sensitivity |
| CN110915134A (en) * | 2017-08-10 | 2020-03-24 | 三星电子株式会社 | Electronic device and method for controlling amplifier based on state of electronic device |
| CN111654298A (en) * | 2019-02-19 | 2020-09-11 | 北京小米松果电子有限公司 | Communication control method, communication control device, storage medium, and baseband chip |
| CN113890642A (en) * | 2021-10-09 | 2022-01-04 | 中信科移动通信技术股份有限公司 | Method and apparatus for testing receiver in communication system |
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Also Published As
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| WO2017071264A1 (en) | 2017-05-04 |
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Application publication date: 20160824 |