CN1086868C - Circuit for separately controlling gains of multiple channels in multichannel communication system - Google Patents
Circuit for separately controlling gains of multiple channels in multichannel communication system Download PDFInfo
- Publication number
- CN1086868C CN1086868C CN97122620A CN97122620A CN1086868C CN 1086868 C CN1086868 C CN 1086868C CN 97122620 A CN97122620 A CN 97122620A CN 97122620 A CN97122620 A CN 97122620A CN 1086868 C CN1086868 C CN 1086868C
- Authority
- CN
- China
- Prior art keywords
- signal
- gain
- multichannel
- communication system
- circuit
- 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
Images
Classifications
-
- 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
- H04B1/16—Circuits
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03G—CONTROL OF AMPLIFICATION
- H03G2201/00—Indexing scheme relating to subclass H03G
- H03G2201/70—Gain control characterized by the gain control parameter
- H03G2201/704—Gain control characterized by the gain control parameter being number of multiplexed channels
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Circuits Of Receivers In General (AREA)
Abstract
Circuit for separately controlling gains of multiple channels in multichannel communication system is provided. The radio-frequency signal is received by antenna and distributed to the multi-channel by the power distributor. The received respective multi-channel is detected by a plurality of electrical level detectors so as to generate gain control signal. The gain of multiple channels is controlled by a plurality of gain controller respectively based on gain control sigal so as to improve receiving sensibility of the receiver machine.
Description
The present invention relates to a kind of receiver of multichannel communication system, specifically, relate to a kind of circuit of separately controlling the multichannel gain in the multichannel communication system receiver.
Referring to Fig. 1.The receiver of prior art multichannel communication system comprises antenna 100, band pass filter 110, amplifier 120, local oscillator 130, frequency mixer 140, power divider 150, a plurality of band pass filter 161 ~ 16n, a plurality of AGC (automatic gain control) amplifier 171 ~ 17n and a plurality of A/D converter 181 ~ 18n.
As shown in FIG., band pass filter 110 passes through antenna 100 received RF signals, and the radiofrequency signal of specific passband is carried out filtering.Amplifier 120 amplifies the output signal of band pass filter 110 by specific level.Local oscillator 130 produces the frequency of oscillation that the conversion of signals of receiving is become intermediate-freuqncy signal.Frequency mixer 140 mixes the output signal of amplifier 120 with the frequency of oscillation of local oscillator 130, so that convert the radiofrequency signal of amplifier 120 outputs to intermediate-freuqncy signal.The intermediate-freuqncy signal of power divider 150 receiving mixers 140 output, and with the intermediate-freuqncy signal received by Frequency Distribution to band pass filter 161 ~ 16n that its oneself passband is arranged respectively.The intermediate-freuqncy signal of each band pass filter 161 ~ 16n received power distributor 150, and the intermediate-freuqncy signal of its own band connection frequency of filtering.The output signal that AGC amplifier 171 ~ 17n amplifies band pass filter 161 ~ 16n respectively.A/D converter 181 ~ 18n converts the output signal of AGC amplifier 171 ~ 17n to digital signal respectively.
In sum as can be known, the intermediater-frequency stage of prior art multichannel communication system receiver and the number of A/D converter, with the number of Traffic Channel as many.In addition, if the signal of the varying level of receiving is not separately to amplify, when the signal level of then receiving was low, its signal to noise ratio may be lower; On the contrary, when the signal level of receiving is higher, may distortion maybe may produce parasitic signal, thereby influence other signal of receiving and receiving sensitivity is descended.
Therefore the purpose of this invention is to provide multichannel communication system a kind of in order to the level that detects received signal separately to control the receiver of multichannel gain.
According to one aspect of the present invention, the circuit of separately controlling the multichannel gain in the multichannel communication system receiver provided by the invention comprises: an antenna, use for received RF signal; A power divider is given a plurality of channels for the signal that will receive by antenna assignment; A plurality of level detectors supply to detect the signal of receiving by each multichannel, thereby produce gain control signal; With a plurality of gain controllers, for separately controlling multi channel gain according to gain control signal.
In addition, described circuit also comprises a plurality of signal compensators, uses for the multi channel delay error of compensation.
Can more clearly understand above and other objects of the present invention, characteristics and advantage from the detailed description of embodiments of the invention being done below in conjunction with accompanying drawing.In the accompanying drawing:
Fig. 1 shows the block diagram of prior art multichannel communication system receiver;
Fig. 2 shows the block diagram of the multichannel communication system receiver of the embodiment of the invention;
Fig. 3 a shows the signal frequency that level that receiver shown in Figure 2 receives has nothing in common with each other (f1 ~ f4);
Fig. 3 b shows the similar signal frequency of the level (f1 ~ f4) of receiver shown in Figure 2 output;
Fig. 4 a shows the characteristic curve of one embodiment of the present of invention for the gain controller that amplifies received signal frequency (f1);
Fig. 4 b shows the characteristic curve of one embodiment of the present of invention for the gain controller that amplifies received signal frequency (f2);
Fig. 4 c shows the characteristic curve of one embodiment of the present of invention for the gain controller that amplifies received signal frequency (f3);
Fig. 4 d shows the characteristic curve of one embodiment of the present of invention for the gain controller that amplifies received signal frequency (f4).
Describe a most preferred embodiment of the present invention in detail referring to accompanying drawing below.The same reference numeral components identical of in whole specification, using in the accompanying drawing.In addition, should know to be understood that the many details that resemble circuit element details and so on only are to propose with the form of giving an example in order to understand the present invention better, and not have these details can implement the present invention too.
Referring to Fig. 2.The receiver of the multichannel communication system of one embodiment of the invention comprises antenna 100, band pass filter 110, amplifier 120, local oscillator 130, frequency mixer 140, power divider 150, a plurality of band pass filter 161 ~ 16n, a plurality of gain controller 201 ~ 20n signal synthesizer 230, amplifier 240 and A/D converter 250.
Receiver of the present invention receives frequency input signal f1 ~ f4 that (shown in Fig. 3 a) level has nothing in common with each other through antenna 100, and produces (shown in Fig. 3 b) level similar output signal frequency f 1 ~ f4.In addition, Fig. 4 a to 4d illustrates the characteristic curve for the gain controller 201 ~ 20n that amplifies received signal frequency f 1 ~ f4 respectively.
Referring now to Fig. 2 to Fig. 4 d.Band pass filter 110 is through antenna 100 received RF signals, and the radiofrequency signal of the specific passband received is carried out filtering.Amplifier 120 amplifies the output of band pass filter 110 with particular level.Local oscillator 130 produces frequency of oscillation for the conversion of signals of being received is become intermediate-freuqncy signal.Frequency mixer 140 mixes the output signal of amplifier 120 with the frequency of oscillation of local oscillator 130, so that convert the radiofrequency signal of amplifier 120 outputs to intermediate-freuqncy signal.The intermediate-freuqncy signal of power divider 150 receiving mixers 140 output, and the intermediate-freuqncy signal of being received is distributed to the band pass filter 161 ~ 16n of the passband that oneself is respectively arranged by frequency.The intermediate-freuqncy signal of each band pass filter 161 ~ 16n received power distributor 150 outputs, and the intermediate-freuqncy signal of its oneself band connection frequency carried out filtering.Gain controller 201 ~ 20n amplifies the output signal of band pass filter 161 ~ 16n.Level detector 211 ~ 21n detects gain controller 201 ~ 20n output signal level, to produce gain control signal, for the gain according to detected level ride gain controller 201 ~ 20n.Gain controller 201 ~ 20n amplifies institute by the frequency characteristic shown in Fig. 4 a to Fig. 4 d according to gain control signal and receives as shown in Figure 3 signal, thus the gain controlling output signal of generation shown in Fig. 3 b.In other words, gain controller 201 ~ 20n amplifies the signal that for example level has nothing in common with each other shown in Fig. 3 a of receiving respectively according to gain control signal, thereby produces shown in Fig. 3 b level similar output signal each other.Signal compensator 221 ~ 22n compensates the delay error of each channel, the output signal of 230 composite signal compensators of signal synthesizer, 221 ~ 22n.Shown in Fig. 3 b is, the characteristic curve of signal synthesizer 230 output signals, the level difference value of its Maximum Output Level Rxmax and minimum output level Rxmin has reduced widely.Then, the output signal of amplifier 240 amplifying signal synthesizers 230, A/D converter 250 converts the output signal of amplifier 240 to digital signal.
In sum as can be known, the collection of letters function of multichannel communication system of the present invention is separately controlled multi channel gain, thereby has improved receiving sensitivity.
Though be to be elaborated above with regard to most preferred embodiment of the present invention, but should know to be understood that the experts in present technique field may belong to the present invention in spirit described in the appended claims and scope to all changes and/or the modification that the invention basic principle that the present invention is instructed is done here.
Claims (3)
1. one kind in order to separately to control the circuit of the gain of multichannel in the multichannel communication system receiver, it is characterized in that it comprises:
An antenna is used for received RF signal;
A power divider is in order to give described multichannel by antenna with the signal allocation of receiving;
A plurality of level detectors supply to detect receive by each corresponding multi channel signal, thereby produce gain control signal; With
A plurality of gain controllers are for separately controlling described multi channel gain according to described gain control signal.
2. multichannel gain control circuit as claimed in claim 1 is characterized in that it also comprises a plurality of signal compensators, uses for the described multi channel delay error of compensation.
3. multichannel gain control circuit as claimed in claim 1 is characterized in that it also comprises:
A signal synthesizer is in order to the output signal of synthetic described gain controller; With
An A/D converter becomes digital signal in order to the conversion of signals with described signal synthesizer output.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR58947/96 | 1996-11-28 | ||
| KR1019960058947A KR100217417B1 (en) | 1996-11-28 | 1996-11-28 | Circuit for controlling automatic gain in multi-channel communication system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1189022A CN1189022A (en) | 1998-07-29 |
| CN1086868C true CN1086868C (en) | 2002-06-26 |
Family
ID=19484241
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97122620A Expired - Fee Related CN1086868C (en) | 1996-11-28 | 1997-11-28 | Circuit for separately controlling gains of multiple channels in multichannel communication system |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100217417B1 (en) |
| CN (1) | CN1086868C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20010046116A (en) * | 1999-11-10 | 2001-06-05 | 박종섭 | Smart antenna base station system and control method using adapt renewal gain price converter |
| KR100706223B1 (en) * | 2000-11-16 | 2007-04-11 | 삼성전자주식회사 | Automatic gain control circuit for guaranteeing power of receiving signal |
| CN104954306B (en) | 2014-03-27 | 2018-03-13 | 华为技术有限公司 | Multichannel array device for compensation of distortion and method |
| US9924480B2 (en) * | 2015-07-24 | 2018-03-20 | Samsung Electronics Co., Ltd | Apparatus and method for calibrating delay between signal paths |
-
1996
- 1996-11-28 KR KR1019960058947A patent/KR100217417B1/en not_active IP Right Cessation
-
1997
- 1997-11-28 CN CN97122620A patent/CN1086868C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR100217417B1 (en) | 1999-09-01 |
| CN1189022A (en) | 1998-07-29 |
| KR19980039831A (en) | 1998-08-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1147180C (en) | Multi-frequency band mobile unit communication equipment | |
| US5491839A (en) | System for short range transmission of a plurality of signals simultaneously over the air using high frequency carriers | |
| US4422047A (en) | Solid state autotune power amplifier | |
| US5815036A (en) | Apparatus and method for controlling feedforward amplifier | |
| CN101159439B (en) | Gain controlled processing receiver | |
| WO1996012343A1 (en) | Transmitters for radio telephone base stations | |
| EP0838896A3 (en) | Radio receiver gain control | |
| US6370370B1 (en) | Method for improving the wanted signal in a radio receiving unit | |
| CN103415998B (en) | Gain control circuit, communicator, electronic equipment and gain control method | |
| US4039953A (en) | Automatic aerial attenuator | |
| EP0451277B1 (en) | Automatic gain control circuit | |
| CN1086868C (en) | Circuit for separately controlling gains of multiple channels in multichannel communication system | |
| KR100223375B1 (en) | Apparatus and method for automatically contwlling gain in multic-channel communication system | |
| US5625321A (en) | Variable gain amplifier apparatus | |
| JP2000134174A (en) | Ofdm receiver | |
| US5204980A (en) | Radio receiver systems | |
| EP1085662A2 (en) | Multi-carrier transmitter, radio base station equipment and radio communication system used thereof | |
| CN1250247A (en) | Frequency hopping and pilot frequency technology using for control sytsem for distortion generated from reducing circuit | |
| CN103888193A (en) | Method, system and apparatus for coupling multiple radio receivers to a receiving antenna | |
| KR100223369B1 (en) | Apparatus and method for automatically contwlling gain in multic-channel communication system | |
| JP2658624B2 (en) | Receiver | |
| US7369812B2 (en) | Method and circuit arrangement for determining the signal strength in receivers with complex signal processing | |
| KR0123396B1 (en) | Output power detector | |
| JP2545060Y2 (en) | Demodulation circuit | |
| FI85786C (en) | The radio receiver. |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C06 | Publication | ||
| PB01 | Publication | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20020626 Termination date: 20161128 |