CN204993317U - Receiver and communication terminal - Google Patents
Receiver and communication terminal Download PDFInfo
- Publication number
- CN204993317U CN204993317U CN201520835269.1U CN201520835269U CN204993317U CN 204993317 U CN204993317 U CN 204993317U CN 201520835269 U CN201520835269 U CN 201520835269U CN 204993317 U CN204993317 U CN 204993317U
- Authority
- CN
- China
- Prior art keywords
- receiver
- signal
- low noise
- noise amplifier
- lna15
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Abstract
The utility model provides a receiver and communication terminal. The utility model discloses a receiver includes antenna, band pass filter, radio frequency transceiving letter machine and baseband processor in proper order on signal reception's chain way, the antenna with still be provided with a low -noise amplifier between the radio frequency transceiving letter machine for to receiving the signal hangs down noise amplification to be handled, in order to reduce the noise coefficient of receiver. The utility model also discloses an adopt the as above communication terminal of receiver. The utility model discloses a receiver and communication terminal through adopting above -mentioned receiver, can reduce the noise coefficient in the signal reception link, improves signal reception's sensitivity to improve communication terminal's signal processing efficiency, improve communication terminal's communication quality.
Description
Technical field
The utility model relates to communication technical field, particularly relates 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, and interpersonal communication exchange also becomes more and more convenient.
In the existing communication technology, receiver (Transceiver) in communication terminal is one of part of most critical in communication terminal, the sensitivity of receiver directly determines the ability of communication terminal Received signal strength, thus determines the quality of the communication quality of communication terminal.The link of the receiver Received signal strength in prior art in communication terminal comprises antenna, band pass filter (BandPassFilter; BPF), radio-frequency (RF) transceiver and baseband processor.In the process of receiver Received signal strength, first by antenna receiving signal, band pass filter filters the signal received, the noise outside filtered signal frequency range; Then send to baseband processor after by radio-frequency (RF) transceiver low noise amplification process and Frequency mixing processing being carried out to signal, by baseband processor, signal decoded, the process such as despreading, and the signal finally obtained is supplied to user.
But, in the existing communication technology receiver Received signal strength link in noise factor comparatively large, thus cause the signal receiving sensitivity of receiver lower.
Summary of the invention
The utility model provides a kind of receiver and communication terminal, larger with noise factor in the link overcoming receiver Received signal strength in prior art, cause the technical problem that the signal receiving sensitivity of receiver is lower, to realize the noise factor reduced in the link of receiver Received signal strength, improve the signal receiving sensitivity of receiver.
The utility model provides a kind of receiver, and described receiver comprises antenna, band pass filter, radio-frequency (RF) transceiver and baseband processor successively on the link of Signal reception; The first low noise amplifier is also provided with, for carrying out low noise amplification process to the described signal received, to reduce the noise factor of described receiver between described antenna and described radio-frequency (RF) transceiver.
Further alternatively, in receiver as above, described first low noise amplifier is arranged between described band pass filter and described radio-frequency (RF) transceiver.
Further alternatively, in receiver as above, described receiver also comprises the first switch, and described first switch-linear hybrid is between described antenna and described band pass filter; Or described switch-linear hybrid is between described band pass filter and described first low noise amplifier.
Further alternatively, in receiver as above, described first low noise amplifier is arranged between described antenna and described band pass filter.
Further alternatively, in receiver as above, described receiver also comprises second switch, and described second switch is arranged between described antenna and described first low noise amplifier; Or described switch-linear hybrid is between described first low noise amplifier and described band pass filter.
Further alternatively, in receiver as above, described baseband processor, also for detecting the signal strength signal intensity of received signal, and judges whether described signal strength signal intensity is greater than or equal to described predetermined threshold value; And when described signal strength signal intensity is greater than or equal to described predetermined threshold value, send the first control signal to described first low noise amplifier, described first low noise amplifier is led directly to.
Further alternatively, in receiver as above, described baseband processor, also for when the described signal strength signal intensity of described signal reception being detected is less than described predetermined threshold value, send the second control signal to described first low noise amplifier, close the straight-through of described first low noise amplifier.
Further alternatively, in receiver as above, described radio-frequency (RF) transceiver comprises the second low noise amplifier and frequency mixer, and described frequency mixer communicates to connect with described second low noise amplifier and described baseband processor respectively.
The utility model also provides a kind of communication terminal, it is characterized in that, the receiver of described communication terminal adopts as above arbitrary described receiver.
Receiver of the present utility model and communication terminal, wherein receiver comprises antenna, band pass filter, radio-frequency (RF) transceiver and baseband processor successively on the link of Signal reception; By arranging the first low noise amplifier between the antenna and radio-frequency (RF) transceiver of receiver, for carrying out low noise amplification process to the received signal, to reduce the noise factor in Signal reception link, noise factor in the link of receiver Received signal strength of the prior art can be solved larger, cause the technical problem that signal receiving sensitivity is lower, thus realize reducing the noise factor in Signal reception link, reduce the Sensitirity va1ue of Signal reception, thus improve the sensitivity of Signal reception.And communication terminal of the present utility model, by adopting above-mentioned receiver, also can reduce the noise factor of communication terminal, improving the sensitivity of communication terminal Received signal strength, improve the efficiency of communication terminal signals process, improve the communication quality of communication terminal.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
Fig. 1 is the structural representation of receiver one embodiment of the present utility model.
Fig. 2 is the structural representation of another embodiment of receiver of the present utility model.
Fig. 3 is the structural representation of a receiver of the present utility model embodiment again.
Fig. 4 is the structural representation of the another embodiment of receiver of the present utility model.
Fig. 5 is the structural representation of receiver of the present utility model another embodiment again.
Fig. 6 is the structural representation of receiver of the present utility model another embodiment again.
Embodiment
For making the object of the utility model embodiment, technical scheme and advantage clearly, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is the utility model part embodiment, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all belong to the scope of the utility model protection.
Fig. 1 is the structural representation of receiver one embodiment of the present utility model.As shown in Figure 1, the receiver of the present embodiment comprises antenna 11, BPF12, radio-frequency (RF) transceiver 13 and baseband processor 14 successively on the link of Signal reception, and on the link of this Signal reception, antenna 11, BPF12, radio-frequency (RF) transceiver 13 and baseband processor 14 communicate to connect successively.Wherein between antenna 11 and radio-frequency (RF) transceiver 13, be also provided with the first low noise amplifier (LowNoiseAmplifier; LNA) the 15, the one LNA15 is used for carrying out low noise amplification process to the received signal, to reduce the noise factor in the Signal reception link of receiver.Receiver such as shown in Fig. 1 is arranged between BPF12 and radio-frequency (RF) transceiver 13 for a LNA15.
In the present embodiment, BPF11 specifically can adopt surface acoustic wave (SurfaceAcousticWave; SAW) filter realizes.
The receiver of the present embodiment, on Signal reception link, antenna 11 is for Received signal strength; After BPF12 is positioned at antenna 11, the signal that BPF12 is used for antenna 11 receives carries out filtering, the noise outside the frequency band range at filtered signal place; After one LNA15 is positioned at BPF12, a LNA15 carries out low noise amplification process to the signal after filtering; Radio-frequency (RF) transceiver 13 processes the signal after low noise amplification process after being positioned at a LNA15, is finally undertaken decoding by the signal after baseband processor 14 radio frequency transceiver 13 processes, the process such as despreading, the reception process of settling signal.
The receiver of the present embodiment is on the link of Signal reception, and the sensitivity of Received signal strength can adopt following formula (1) to represent:
Sensitivity=thermal noise power spectrum density+10 × lg (subcarrier spacing)+noise factor+demodulation threshold+10 × lg (needing sub-carrier number) (1) of Received signal strength
Wherein, thermal noise power spectrum density can be-174dBm/Hz, and subcarrier spacing is 15KHz, and demodulation threshold is also certain.Need sub-carrier number usually by base station assigns, when needs sub-carrier number is determined, the noise factor on whole Signal reception link is depended in the sensitivity in the Signal reception link of therefore receiver.
Noise factor cascading equations in the Signal reception link of the receiver of the present embodiment can be expressed as formula (2):
Wherein NF
sysfor the noise factor in the Signal reception link of receiver; NF
lNA1be the noise factor value of a LNA15 be about 1dB, NF
bPFfor the Insertion Loss of BPF12; And the BPF12 Insertion Loss of each producer is more or less the same, value is about 2.5dB.G
lNA1be the gain of a LNA15, value is about 12dB; NF
transceiverbe the noise factor of radio-frequency (RF) transceiver 13, value is about 2.5dB.
And in Fig. 1, the receiver corresponding when not arranging a LNA15 and the receiver structure of prior art, the noise factor cascading equations in the Signal reception link of now this receiver can be expressed as formula (3):
NF
sys≈NF
BPF+NF
Transceiver(3)
Each parameter value, with reference to the record of previous embodiment, does not repeat them here.
By the noise factor cascading equations (2) in the Signal reception link of the receiver of the present embodiment, contrast with the cascading equations (3) of the noise factor in the Signal reception link of the receiver of above-mentioned prior art, can learn that the noise factor of cascading equations (2) gained of the noise factor in the Signal reception link of the receiver of the present embodiment is less.Therefore by the noise factor of cascading equations (2) gained of the noise factor in the Signal reception link of the receiver of the present embodiment, substitute in the formula (1) of the sensitivity of receiver Received signal strength, the numerical value of the sensitivity in Signal reception link can be made less, thus improve the sensitivity of Signal reception.Therefore pass through increase the one LNA15 in the present embodiment, to reduce the noise factor in the Signal reception link of receiver, thus the Sensitirity va1ue of Signal reception can be reduced, thus improve the sensitivity of Signal reception.
The receiver of the present embodiment, only comprise compared with receiver that antenna 11, BPF12, radio-frequency (RF) transceiver 13 and baseband processor 14 form with traditional, by increasing by a LNA15 between BPF12 and radio-frequency (RF) transceiver 13, because noise factor obtains according to the cascade connection of each assembly in whole Signal reception link, by increasing by a LNA15 in the link of receiver Received signal strength, just the noise factor in Signal reception link can be reduced, reduce the Sensitirity va1ue of Signal reception, thus improve the sensitivity of Signal reception.
Fig. 2 is the structural representation of another embodiment of receiver of the present utility model.As shown in Figure 2, the receiver of the present embodiment, on the basis of above-mentioned technical scheme embodiment illustrated in fig. 1, introduces the technical solution of the utility model further in further detail.
As shown in Figure 2, the 2nd LNA13a and frequency mixer 13b in the radio-frequency (RF) transceiver 13 in the present embodiment, can be comprised, after the 2nd LNA13a is positioned at a LNA15, communicate to connect with a LNA15; Frequency mixer 13b communicates to connect with a LNA15 and baseband processor 14 respectively.2nd LNA13a is used for carrying out the process of second time low noise amplification to signal, after frequency mixer 13b is positioned at the 2nd LNA13a, frequency mixer 13b is used for carrying out Frequency mixing processing according to base band frequency to the signal after the process of second time low noise amplification, finally decoded by the signal after baseband processor 14 pairs of mixing, the process such as despreading, the reception process of settling signal.
Noise factor in the Signal reception link of the receiver of the present embodiment is with reference to above-mentioned formula embodiment illustrated in fig. 1 (2); And in Fig. 2, the receiver corresponding when not arranging a LNA15 and the receiver structure of prior art, noise factor in the Signal reception link of now this receiver with reference to above-mentioned embodiment illustrated in fig. 1 in formula (3), the present embodiment repeats no more.In like manner, the receiver of the present embodiment, compared with prior art, can make the numerical value of the sensitivity in Signal reception link less, thus improves the sensitivity of Signal reception.
Further alternatively, in the receiver of the present embodiment, baseband processor 14 also for detecting the signal strength signal intensity of received signal, and judges whether signal strength signal intensity is greater than or equal to predetermined threshold value; And when signal strength signal intensity is greater than or equal to predetermined threshold value, send the first control signal to a LNA15, a LNA15 is led directly to.In the present embodiment, a LNA15 is led directly to, even if a LNA15Bypass, be namely equivalent to LNA15 direct short-circuit in Signal reception link, low noise amplification process do not carried out to the signal received.In the present embodiment, baseband processor 14 can be that a universal input exports (GeneralPurposeInputOutput to the first control signal that a LNA15 sends; GPIO) control signal, this first control signal is an enable signal, can be enable to a LNA15, and a LNA15 is led directly to.The signal minimum standard value that predetermined threshold value in the present embodiment can be able to receive for receiver, when the intensity of the signal received by receiver is lower than this predetermined threshold value, the signal quality received will go wrong, such as, cause signal cannot normal decoder etc.Therefore, in the present embodiment, when receiver is positioned at cell edge time, baseband processor 14 detects that the signal strength signal intensity of received signal can be less, when this signal strength signal intensity is less than predetermined threshold value, receiver on Signal reception link now adopts structure as shown in Figure 2, because now signal strength signal intensity is less, one LNA15 carries out low noise amplification process to the signal received on Signal reception link, the intensity of the signal that baseband processor 14 receives can be strengthened, improve the sensitivity of receiver Received signal strength.
And when mobile in the middle of receiver is from cell edge to community, now signal strength signal intensity strengthens gradually, if a LNA15 continues to carry out low noise amplification process to signal, the noise of signal can be increased, thus increase the obstruction of signal in Signal reception link, therefore, when baseband processor 14 detects that the signal strength signal intensity of received signal is greater than or equal to predetermined threshold value, the first control signal is sent to a LNA15, one LNA15 is led directly to, even if a LNA15Bypass, now LNA15 direct short-circuit in Signal reception link, low noise amplification process is not carried out to the signal received, the obstruction of signal in Signal reception link can be avoided.And when receiver is by when again getting back to cell edge in the middle of community, when baseband processor 14 detects that the signal strength signal intensity of received signal is less than predetermined threshold value, baseband processor 14 sends the second control signal to a LNA15, close the straight-through of a LNA15, now a LNA15 again works in Signal reception link, and corresponding Signal reception link as shown in Figure 2.This second control signal is also an enable signal, can be enable to a LNA15, a LNA15 is closed straight-through.
Receiver in the present embodiment, by being detected the signal strength signal intensity of received signal by baseband processor 14, and judges whether signal strength signal intensity is greater than or equal to predetermined threshold value; And when signal strength signal intensity is greater than or equal to predetermined threshold value and signal strength signal intensity is better, baseband processor 14 sends the first control signal to a LNA15, one LNA15 is led directly to, not to the signal low noise amplification process in Signal reception link, avoids the obstruction of signal.And when detect the signal strength signal intensity of received signal be less than predetermined threshold value and signal strength signal intensity bad time, baseband processor 14 sends the second control signal to a LNA15, close the straight-through of a LNA15, now by a LNA15, low noise amplification process is carried out to signal in Signal reception link, strengthen the intensity of the signal that baseband processor 14 receives, improve the sensitivity of receiver Received signal strength.
It should be noted that, at time division duplex (TimeDivisionDuplexing; TDD) in the communication technology, receiver not only can be used for Received signal strength, can also be used for sending signal as transmitter.Such as Received signal strength in previous time slot, sends signal in a rear time slot; Or previous time slot sends signal, a rear time slot Received signal strength.Fig. 3 is the structural representation of a receiver of the present utility model embodiment again.As shown in Figure 3, in order to ensure the flexible switching of the function of receiver and transmitter, the receiver of the present embodiment is on the basis of above-mentioned technical scheme embodiment illustrated in fig. 2, can also be provided with the first switch 16, such as, in the present embodiment, this first switch 16 can be arranged between antenna 11 and BPF12.Such as in tdd communication system, the switching of signal and Received signal strength can be realized sending by arranging this first switch 16.In practical application, this first switch 16 also can be arranged between BPF12 and a LNA15, and it is similar that it realizes principle, do not repeat them here.
Now, the noise factor cascading equations in the Signal reception link of the receiver of the present embodiment can be expressed as formula (4):
Wherein NF
sWthe Insertion Loss of the first switch 16 represented, the record of other parameter reference previous embodiment, does not repeat them here.
And in the receiver structure of prior art, be also provided with this first switch 16, the noise factor cascading equations in the Signal reception link of now this receiver can be expressed as formula (5):
NF
sys≈NF
SW+NF
BPF+NF
Transceiver(5)
And the first switch 16 of each producer and BPF12 Insertion Loss are more or less the same.In like manner, with reference to above-mentioned correlation analysis embodiment illustrated in fig. 1, can learn the noise factor cascading equations (4) in the Signal reception link of the receiver of the present embodiment, contrast with the cascading equations (5) of the noise factor in the Signal reception link of the receiver of corresponding prior art, can learn that the noise factor of cascading equations (4) gained of the noise factor in the Signal reception link of the receiver of the present embodiment is less.Therefore the noise factor of cascading equations (4) gained of the noise factor in the Signal reception link of the receiver of the present embodiment is substituted in the formula (1) of sensitivity of receiver Received signal strength, the numerical value of the sensitivity in Signal reception link can be made less, thus improve the sensitivity of Signal reception.And prove through experimental data, the receiver of the present embodiment, compared with the receiver of prior art, can improve the sensitivity of about 1dB.
Fig. 4 is the structural representation of the another embodiment of receiver of the present utility model.As shown in Figure 4, the receiver of the present embodiment and the difference of receiver embodiment illustrated in fig. 1 are: the present embodiment to arrange a LNA15 between antenna 11 and BPF12, accordingly, the receiver of the present embodiment comprises antenna 11, a LNA15, BPF12, radio-frequency (RF) transceiver 13 and baseband processor 14 successively on the link of Signal reception, and on the link of this Signal reception, antenna 11, a LNA15, BPF12, radio-frequency (RF) transceiver 13 and baseband processor 14 communicate to connect successively.One LNA15 is used for carrying out low noise amplification process to the received signal, to reduce the noise factor in the Signal reception link of receiver.All the other structures are embodiment illustrated in fig. 1 identical with above-mentioned, with reference to above-mentioned record embodiment illustrated in fig. 1, can not repeat them here in detail.
The receiver of the present embodiment, on Signal reception link, antenna 11 is for Received signal strength; After one LNA15 is positioned at antenna 11, a LNA15 carries out low noise amplification process to the signal that antenna 11 receives; After BPF12 is positioned at a LNA15, BPF12 is used for carrying out filtering, the noise outside the frequency band range at filtered signal place to the signal after a LNA15 low noise amplification process; After radio-frequency (RF) transceiver 13 is positioned at BPF12, the signal after filtering is processed, is finally undertaken decoding by the signal after baseband processor 14 radio frequency transceiver 13 processes, the process such as despreading, the reception process of settling signal.
Because noise factor obtains according to the cascade connection of each assembly in whole Signal reception link, and the moon is larger near the impact of device on noise factor of source location, such as first order device having the greatest impact to noise factor, the impact of afterbody device on noise factor is minimum.Such as, in the present embodiment, a LNA15 plays leading role to the noise factor in the Signal reception link of receiver, and noise factor role in the Signal reception link of radio-frequency (RF) transceiver 13 pairs of receivers is minimum.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 the noise factor in Signal reception link, thus the sensitivity of Signal reception can be improved further.
Noise factor cascading equations in the Signal reception link of the receiver of the present embodiment can be expressed as formula (6):
The record of each parameter reference above-described embodiment, does not repeat them here.
Noise factor (6) in the Signal reception link of the receiver of the present embodiment with above-mentioned embodiment illustrated in fig. 1 in receiver Signal reception link in noise factor (2) compared with, noise factor is less.Therefore compared with receiver embodiment illustrated in fig. 1, the noise factor of cascading equations (6) gained of the noise factor in the Signal reception link of the receiver of the present embodiment is substituted in the formula (1) of the sensitivity of receiver Received signal strength, the numerical value of the sensitivity in Signal reception link can be made less, thus improve the sensitivity of Signal reception.And prove through experimental data, the receiver of the present embodiment, compared with the receiver of prior art, can improve the sensitivity of about 3dB.
The receiver of the present embodiment, by increasing by a LNA15 between antenna 11 and BPF12, because noise factor obtains according to the cascade connection of each assembly in whole Signal reception link, by increasing by a LNA15 in the link of receiver Received signal strength, just can reduce the noise factor in Signal reception link, improve the sensitivity of Signal reception.
Fig. 5 is the structural representation of receiver of the present utility model another embodiment again.As shown in Figure 5, the receiver of the present embodiment, on the basis of above-mentioned technical scheme embodiment illustrated in fig. 4, introduces the technical solution of the utility model further in further detail.
As shown in Figure 5, the receiver of the present embodiment is on the basis of above-mentioned technical scheme embodiment illustrated in fig. 4, adopt the structure of the radio-frequency (RF) transceiver 13 shown in Fig. 2, the 2nd LNA13a and frequency mixer 13b can be comprised in the receiver 13 of i.e. the present embodiment, with reference to above-mentioned structure embodiment illustrated in fig. 2, can not repeat them here in detail.
Noise factor in the Signal reception link of the receiver of the present embodiment is with reference to above-mentioned formula embodiment illustrated in fig. 4 (6); And in Fig. 5, the receiver corresponding when not arranging a LNA15 and the receiver structure of prior art, noise factor in the Signal reception link of now this receiver with reference to above-mentioned embodiment illustrated in fig. 1 in formula (3), the present embodiment repeats no more.In like manner, the receiver of the present embodiment, compared with prior art, can make the numerical value of the sensitivity in Signal reception link less, thus improves the sensitivity of Signal reception.
In like manner, as shown in Figure 5, further alternatively, in the receiver of the present embodiment, baseband processor 14 also for detecting the signal strength signal intensity of received signal, and judges whether signal strength signal intensity is greater than or equal to predetermined threshold value; And when signal strength signal intensity is greater than or equal to predetermined threshold value, send the first control signal to a LNA15, a LNA15 is led directly to.In like manner, in the present embodiment, a LNA15 is led directly to, even if a LNA15Bypass, be namely equivalent to LNA15 direct short-circuit in Signal reception link, low noise amplification process do not carried out to the signal received.In the present embodiment, baseband processor 14 can be a GPIO control signal to the first control signal that a LNA15 sends, and this first control signal is an enable signal, can be enable to a LNA15, and a LNA15 is led directly to.The signal minimum standard value that predetermined threshold value in the present embodiment can be able to receive for receiver, when the intensity of the signal received by receiver is lower than this predetermined threshold value, the signal quality received will go wrong, such as, cause signal cannot normal decoder etc.Therefore, in the present embodiment, when receiver is positioned at cell edge time, baseband processor 14 detects that the signal strength signal intensity of received signal can be less, when this signal strength signal intensity is less than predetermined threshold value, receiver on Signal reception link now adopts structure as shown in Figure 2, because now signal strength signal intensity is less, one LNA15 carries out low noise amplification process to the signal received on Signal reception link, the intensity of the signal that baseband processor 14 receives can be strengthened, improve the sensitivity of receiver Received signal strength.
And when mobile in the middle of receiver is from cell edge to community, now signal strength signal intensity strengthens gradually, if a LNA15 continues to carry out low noise amplification process to signal, the noise of signal can be increased, thus increase the obstruction of signal in Signal reception link, therefore, when baseband processor 14 detects that the signal strength signal intensity of received signal is greater than or equal to predetermined threshold value, the first control signal is sent to a LNA15, one LNA15 is led directly to, even if a LNA15Bypass, now LNA15 direct short-circuit in Signal reception link, low noise amplification process is not carried out to the signal received, the obstruction of signal in Signal reception link can be avoided.And when receiver is by when again getting back to cell edge in the middle of community, when baseband processor 14 detects that the signal strength signal intensity of received signal is less than predetermined threshold value, baseband processor 14 sends the second control signal to a LNA15, close the straight-through of a LNA15, now a LNA15 again works in Signal reception link, and corresponding Signal reception link as shown in Figure 2.This second control signal is also an enable signal, can be enable to a LNA15, a LNA15 is closed straight-through.
Receiver in the present embodiment, by being detected the signal strength signal intensity of received signal by baseband processor 14, and judges whether signal strength signal intensity is greater than or equal to predetermined threshold value; And when signal strength signal intensity is greater than or equal to predetermined threshold value and signal strength signal intensity is better, baseband processor 14 sends the first control signal to a LNA15, one LNA15 is led directly to, not to the signal low noise amplification process in Signal reception link, avoids the obstruction of signal.And when detect the signal strength signal intensity of received signal be less than predetermined threshold value and signal strength signal intensity bad time, baseband processor 14 sends the second control signal to a LNA15, close the straight-through of a LNA15, now by a LNA15, low noise amplification process is carried out to signal in Signal reception link, strengthen the intensity of the signal that baseband processor 14 receives, improve the sensitivity of receiver Received signal strength.
Fig. 6 is the structural representation of receiver of the present utility model another embodiment again.As shown in Figure 6, the receiver of the present embodiment, on the basis of above-mentioned technical scheme embodiment illustrated in fig. 5, introduces the technical solution of the utility model further in further detail.
In order to can at time division duplex (TimeDivisionDuplexing; TDD) use the receiver of the present embodiment in the communication technology, second switch 17 can also be set between antenna 11 and a LNA15.As shown in Figure 6, in the present embodiment, so that second switch 17 is arranged between antenna 11 and a LNA15.
Noise factor cascading equations in the Signal reception link of the present embodiment receiver can be expressed as formula (7):
The second switch 17 of the present embodiment can adopt the switch identical with above-mentioned first switch 16 embodiment illustrated in fig. 3, therefore wherein NF
sWthe Insertion Loss of the second switch 17 that yet can represent, the record of other parameter reference previous embodiment, does not repeat them here.
In like manner, the noise factor (7) in the Signal reception link of the receiver of the present embodiment with above-mentioned embodiment illustrated in fig. 3 in receiver Signal reception link in noise factor (5) compared with, noise factor is less.Therefore compared with receiver embodiment illustrated in fig. 3, the noise factor of cascading equations (7) gained of the noise factor in the Signal reception link of the receiver of the present embodiment is substituted in the formula (1) of the sensitivity of receiver Received signal strength, the numerical value of the sensitivity in Signal reception link can be made less, thus improve the sensitivity of Signal reception.And prove through experimental data, the receiver of the present embodiment, 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 also can be arranged between a LNA15 and BPF12, and now a LNA15 is arranged between antenna 11 and second switch 17.And the receiver of the above-mentioned Fig. 1 of the utility model-Fig. 6 any embodiment all goes on the receiver in tdd communication system.
The utility model also provides a kind of communication terminal, and the receiver of communication terminal of the present utility model adopts the receiver of as above Fig. 1-Fig. 6 any embodiment, with reference to the record of above-described embodiment, can not repeat them here in detail.
Communication go side of the present utility model, by adopting the receiver of above-described embodiment, the noise factor of receiver can be reduced, improve the sensitivity of Signal reception, thus reduce the noise factor of communication terminal, improve the sensitivity of communication terminal Received signal strength, improve the efficiency of communication terminal signals process, improve the communication quality of communication terminal.
Device embodiment described above is only schematic, the unit wherein illustrated as separating component or can may not be and physically separates, parts as unit display can be or may not be physical location, namely can be positioned at a place, or also can be distributed at least two network element.Some or all of module wherein can be selected according to the actual needs to realize the object of the present embodiment scheme.Those of ordinary skill in the art, when not paying performing creative labour, are namely appreciated that and implement.
Last it is noted that above each embodiment is only in order to illustrate the technical solution of the utility model, be not intended to limit; Although be described in detail the utility model with reference to foregoing embodiments, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein some or all of technical characteristic; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the scope of each embodiment technical scheme of the utility model.
Claims (9)
1. a receiver, described receiver comprises antenna, band pass filter, radio-frequency (RF) transceiver and baseband processor successively on the link of Signal reception; It is characterized in that, between described antenna and described radio-frequency (RF) transceiver, be also provided with the first low noise amplifier, for carrying out low noise amplification process to the described signal received, to reduce the noise factor of described receiver.
2. receiver according to claim 1, is characterized in that, described first low noise amplifier is arranged between described band pass filter and described radio-frequency (RF) transceiver.
3. receiver according to claim 2, is characterized in that, described receiver also comprises the first switch, and described first switch-linear hybrid is between described antenna and described band pass filter; Or described switch-linear hybrid is between described band pass filter and described first low noise amplifier.
4. receiver according to claim 1, is characterized in that, described first low noise amplifier is arranged between described antenna and described band pass filter.
5. receiver according to claim 4, is characterized in that, described receiver also comprises second switch, and described second switch is arranged between described antenna and described first low noise amplifier; Or described switch-linear hybrid is between described first low noise amplifier and described band pass filter.
6., according to the arbitrary described receiver of claim 1-5, it is characterized in that, described baseband processor, also for detecting the signal strength signal intensity of received signal, and judging whether described signal strength signal intensity is greater than or equal to described predetermined threshold value; And when described signal strength signal intensity is greater than or equal to described predetermined threshold value, send the first control signal to described first low noise amplifier, described first low noise amplifier is led directly to.
7. receiver according to claim 6, it is characterized in that, described baseband processor, also for when the described signal strength signal intensity of described signal reception being detected is less than described predetermined threshold value, send the second control signal to described first low noise amplifier, close the straight-through of described first low noise amplifier.
8., according to the arbitrary described receiver of claim 1-5, it is characterized in that, described radio-frequency (RF) transceiver comprises the second low noise amplifier and frequency mixer, and described frequency mixer communicates to connect with described second low noise amplifier and described baseband processor respectively.
9. a communication terminal, is characterized in that, the receiver of described communication terminal adopts the arbitrary described receiver of as above claim 1-8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520835269.1U CN204993317U (en) | 2015-10-26 | 2015-10-26 | Receiver and communication terminal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520835269.1U CN204993317U (en) | 2015-10-26 | 2015-10-26 | Receiver and communication terminal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204993317U true CN204993317U (en) | 2016-01-20 |
Family
ID=55127636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520835269.1U Expired - Fee Related CN204993317U (en) | 2015-10-26 | 2015-10-26 | Receiver and communication terminal |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204993317U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017071264A1 (en) * | 2015-10-26 | 2017-05-04 | 乐视控股（北京）有限公司 | Receiver and communication terminal |
-
2015
- 2015-10-26 CN CN201520835269.1U patent/CN204993317U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017071264A1 (en) * | 2015-10-26 | 2017-05-04 | 乐视控股（北京）有限公司 | Receiver and communication terminal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN205039804U (en) | Receiver and communication terminal | |
| US8160528B2 (en) | Method and device for detecting presence of a carrier signal in a received signal | |
| US7734311B2 (en) | Multimode communication apparatus | |
| US7106816B2 (en) | Supporting multiple wireless protocols in a wireless device | |
| CN102301618A (en) | Method and apparatus for combined multi-carrier reception and receive antenna diversity | |
| US9204488B2 (en) | Wireless communication transmitting and receiving system | |
| NO20065210L (en) | Method and Apparatus for Choosing Multiple Bearings Using a Single Receiver Chain Matched to a Single Bearing | |
| CN1277429C (en) | Isolated enhancing system and method | |
| CA2562681A1 (en) | Methods and apparatus for selecting between multiple carriers using a receiver with multiple receiver chains | |
| CN103781202A (en) | Multi-module wireless terminal | |
| US7796950B2 (en) | Dual mode GSM and WLAN mobile communication device | |
| CN105897284A (en) | Receiver and communication terminal | |
| KR101715403B1 (en) | Multimode wireless modem | |
| CN105871392A (en) | Receiver and communication terminal | |
| CN204993317U (en) | Receiver and communication terminal | |
| US9634872B2 (en) | Multimode receiver and receiving method therefor | |
| CN110880942A (en) | Radio frequency circuit and communication equipment | |
| CN111697985A (en) | 5G radio frequency receiving circuit and wireless communication equipment | |
| EP1145451B1 (en) | Improvements in or relating to polyphase receivers | |
| CN102624410A (en) | Playing device for closing frequency modulation broadcast automatically and achieving method thereof | |
| CN214205516U (en) | Electronic equipment | |
| KR19990009325A (en) | Antenna switching diversity apparatus and method without duplexer | |
| CN110809332A (en) | Base station and communication method thereof | |
| CN103856255A (en) | Communication signal processing method and terminal using same | |
| CN217522835U (en) | Circuit structure and terminal for processing transmitting and receiving signals of radio frequency front end |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160112 Address after: Korea 101399 Beijing city Shunyi District town culture camp north of the village (two Airport Road No. 1) Patentee after: Mobile intelligent information technology (Beijing) Co., Ltd. Address before: 300457, Tianjin Binhai New Area eco city road 126 anime Road, B1 District, two floor, 201-427 Patentee before: LESHI ZHIXIN ELECTRONIC SCIENCE & TECHNOLOGY (TIANJIN) CO., LTD. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160120 Termination date: 20171026 |