CN105007110A - Diversity reception method based on automatically adjusted weight - Google Patents
Diversity reception method based on automatically adjusted weight Download PDFInfo
- Publication number
- CN105007110A CN105007110A CN201510280253.3A CN201510280253A CN105007110A CN 105007110 A CN105007110 A CN 105007110A CN 201510280253 A CN201510280253 A CN 201510280253A CN 105007110 A CN105007110 A CN 105007110A
- Authority
- CN
- China
- Prior art keywords
- diversity
- weights
- path
- signal
- relative intensity
- 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.)
- Granted
Links
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0837—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using pre-detection combining
- H04B7/0842—Weighted combining
- H04B7/0848—Joint weighting
- H04B7/0857—Joint weighting using maximum ratio combining techniques, e.g. signal-to- interference ratio [SIR], received signal strenght indication [RSS]
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Transmission System (AREA)
Abstract
The present invention discloses a diversity reception method based on an automatically adjusted weight, belonging to the field of wireless communication, and especially relates to a diversity reception method of a digital trunked communication system. According to the diversity reception method of the present invention, the existence of each diversity path signal and signal quality are judged in real time, in this way, in the case that a certain diversity is failed or disconnected, the effect of the diversity in diversity combining can be removed or reduced as much as possible, so as to reduce the influence of the diversity on a final diversity combining effect, thereby greatly improving sensitivity of a receiver.
Description
Technical field
The invention belongs to wireless communication field, particularly relate to the diversity receiving method according to diversity channel state Lookup protocol weights.
Background technology
Diversity reception refers to that receiver multiplely carries identical raw information to what receive, but separate fading characteristic signal, carry out merging treatment according to certain way, to strengthen anti-interference of receiver energy, improve the way of receiving sensitivity.Multi-diversity receiver first need to guarantee to receive multiple independently, carry the fading signal of same raw information, next needs receiver the multiple independently fading signals received can be carried out the merging of certain way, to reduce the impact of external interference.Merging mode main at present has maximum merging, equal gain combining and Maximal ratio combiner, wherein best with the method effect of Maximal ratio combiner, but the method for its channel estimating is very complicated, and in fast fading channel, the performance of this method can worsen very soon, therefore need on the basis of Maximal ratio combiner, find one better simply, can judge whether the signal receiving different diversity channel is useful signal fast, and the method for the useful signal received being carried out rationally, effectively merging.
Summary of the invention
But technical problem to be solved by this invention is: provide simply a kind of can accurately judge diversity signal validity, and carrying out the diversity receiving method of rationally merging, to improve the receiving sensitivity of receiver.The core concept of the inventive method is, the existence of each diversity signal of real-time judge whether with signal quality, make when some diversity inefficacies, disconnection, remove or weaken as far as possible the effect of this diversity in merging, to reduce it to merge effect impact on final diversity, thus significantly can improve the sensitivity of receiver.
For solving the problems of the technologies described above, the present invention is achieved through the following technical solutions: a kind of diversity receiving method based on automatically regulating weights, comprises the following steps:
1) each hardware circuit respectively Real-Time Monitoring its with the connection status of the RF cable of each diversity path, determine whether that allocative efficiency weights distinguished by each diversity path according to connection status; The relative intensity of real-time calculating each diversity path Received signal strength;
2) be that each diversity path distributes weights respectively according to the comparative result of relative intensity and predetermined threshold range; Process and filtering process are mutually asked respectively to the Received signal strength of relative intensity in predetermined threshold range of each diversity path signal, after each process, all signal is prevented to the spacing process of spilling; Using filtering process and spacing after signal as the last solution tonal signal of each diversity path;
3) weights distributed by each diversity path and last solution tonal signal carry out diversity merging.
Wherein, described step 1) in hardware circuit diversity supply access on use double-triode valve do break-make control and short-circuit protection; The operation amplifier circuit detection path electric current of hardware circuit simultaneously, is converted to level change, judges the connection status of RF cable according to the height of level by curent change.
Wherein, described step 1) according to connection status determine whether each diversity path respectively allocative efficiency weights be specially: if connect good, then it is effective for arranging weights; If diversity path disconnects, then it is invalid for arranging weights.
Wherein, described step 1) in calculate each diversity path Received signal strength in real time relative intensity be specially: the I datum of the Received signal strength of each diversity path and Q data are asked respectively and square to be added again, the result obtained is as relative intensity.
Wherein, described step 2) in be that each diversity path distributes weights respectively and is specially according to the comparative result of relative intensity and pre-determined threshold: if relative intensity is lower than default low threshold, the weights of this diversity path are set for presetting threshold ones; If relative intensity is in predetermined threshold range, weights are set according to relative intensity size; If relative intensity is higher than default high threshold, the weights of this diversity path are set for presetting high threshold.
Wherein, described step 2) in all prevent the spacing process of overflowing to be specially to signal after each process: judges whether the numerical value of signal overflows after each process, if spilling, spacing process is carried out to this signal; Otherwise this signal remains unchanged.
Wherein, described step 3) be specially: the last solution tonal signal of each diversity path is multiplied by its weights and by the product addition of all diversity paths, then by the result of addition divided by each diversity path weights and obtain the result that diversity merges.
The advantage that the present invention compares background technology is:
Compared with prior art, the present invention utilizes the method for hardware to monitor in real time signal, provides the judgement of extra diversity validity, eliminates diversity channel that is invalid and poor quality merges effect harmful effect to entirety.Under this kind of method solves low signal-to-noise ratio and strong jamming condition, especially RF front end signal connect unstable and channel fading is very fast when, multi-diversity passage self, to the harmful effect of Diversity Reception, significantly can improve the sensitivity of multi-diversity receiver.
Accompanying drawing explanation
Fig. 1 is the connection status testing circuit structural representation of the RF cable of diversity path of the present invention;
Fig. 2 is the relative intensity computational methods block diagram of diversity path Received signal strength of the present invention;
Fig. 3 is diversity path receiving signal demodulation schematic flow sheet of the present invention;
Fig. 4 is that implementation method block diagram selected by diversity path of the present invention;
Fig. 5 is that weights of the present invention distribute implementation method block diagram;
Fig. 6 is diversity combining method formula of the present invention explanation;
Fig. 7 is that diversity combining method of the present invention realizes block diagram;
Fig. 8 is the overall realization flow block diagram of diversity receiving method of the present invention.
Embodiment
Below for three diversity paths, by reference to the accompanying drawings the method for the invention is described in further detail.
Fig. 8 is the overall realization flow block diagram of diversity receiving method of the present invention.Based on the diversity receiving method automatically regulating weights, comprise the following steps:
1) connection status of each diversity path of each hardware circuit Real-Time Monitoring, calculates the relative intensity of the Received signal strength of each diversity path in real time in FPGA;
If there is the diversity of disconnection, automatically cancel this diversity, and its weights were set to 0 (representing that weights are invalid); If the diversity be disconnected reconnects, automatically recover this diversity, and automatically distribute weights according to its signal power.
Fig. 1 is diversity connection status testing circuit structural representation.This main circuit will act as that radio circuit is powered, radio frequency interface short-circuit protection and radio frequency cable plug identification.Double-triode valve in figure can be used as the switch on supply access, and wherein TR1 is for supplying fulgurite, bears larger operating current.Discharge circuit is voltage comparator, and supply power voltage and input terminal voltage can bear 2V ~ 30V, output end voltage compatible TTL, CMOS.
During normal work, F point high level makes TR2 conducting, and A point is 13.2V, D point be 12.6V, E point is 0V, and now flow through certain electric current at R1 branch road, make TR1 conducting, power supply is powered to radio circuit by L1-TR1-L2.
During output short-circuit, F point low level makes TR2 end, and A point is 13.2V, D point be 12.6V, E point is 12.6V, does not now have electric current to flow through at R1 branch road, and TR1 ends, and power supply stops powering to radio circuit, plays the effect of short-circuit protection.Actual record short circuit after, the turn-off time of TR1 is about 200ns.
Do not insert radio frequency cable, when namely not powering to radio circuit, the electric current flowing through R2 is little, the dividing potential drop of R2 is also little, plug after radio frequency cable powers to radio circuit, the ER effect flowing through R2 is large, and R2 dividing potential drop also becomes large, therefore suitable resistance can be chosen by calculating, Vb>Vc, output output low level when making not plug-in cable, Vb<Vc when plugging cable, output exports high level, is used as the basis for estimation that diversity exists thus.It should be noted that in circuit, R1 and R2 is high-power resistance.
Fig. 2 is diversity signal relative intensity computational methods block diagrams.I, Q data of each diversity are carried out respectively a square calculating, then the I on each road
2+ Q
2as the relative intensity of this road signal, this relative intensity is not actual signal strength signal intensity, does not possess practical significance.In order to prevent overflowing and remove invalid data, relative intensity and predetermined threshold range are compared, according to high threshold value when exceeding high threshold; Lower than when low threshold according to threshold ones value; In the normal signal of predetermined threshold range, arrange its weight values according to diversity signal power, then weights are large by force for diversity signal, and the weak then weights of diversity signal are little.This result is used as the weights in diversity merging.
2) decode operation is carried out to the normal received signal in predetermined threshold range, obtain the signal message after demodulation, and the spacing process of spilling is prevented to this information; According to the result of hardware monitoring, weights batch operation is carried out to each diversity path;
Fig. 3 is diversity signal demodulation schematic flow sheet of the present invention.Demodulating process can be different because of actual coding situation, in the process of each step, just all will have the spacing operation preventing from overflowing, to ensure that last data are effectively, accurately.Data factor use during last Output rusults merges as diversity.
Fig. 4 is that diversity of the present invention selects implementation method block diagram.The connection status of the diversity path of monitoring out according to hardware arranges the numerical value of diversity enable signal, and effective value is 1, and invalid is 0.Which diversity enable signal is 1, just comprises the data of this diversity, otherwise do not comprise in the data factor that diversity merges.For the situation of three diversity, just have eight kinds of possible value condition.
Fig. 5 is that weights of the present invention distribute implementation method block diagram, the method to set up of the weights summation factor and diversity select implementation method similar, which diversity enable signal is 1, the weights of this diversity are just comprised in the weights summation factor that diversity merges, otherwise do not comprise, have eight kinds of possible values equally for three diversity.
3) utilize the weights distributed to conciliate the data message recalled and carry out diversity merging, draw last amalgamation result.
Fig. 6 is that diversity combining method formula of the present invention illustrates schematic diagram.In formula, divisor be the weighted product of each diversity data addition and, whether diversity weighted product uses and depends on step 2) in court verdict.Dividend is the summation of the weights of each diversity, needs according to step 2 equally) in court verdict determine final numerical value.
Fig. 7 be diversity combining method formula of the present invention realize block diagram.As Fig. 7 display, first the weights that the data of each diversity and its are assigned with are multiplied, draw weighted product, then according to step 2) in court verdict carry out after phase add operation as divisor.As each diversity weights summation of dividend, by step 2) in calculate, then according to step 2) in court verdict carry out after phase add operation as dividend.Finally call dividing module and calculate final diversity merging numerical value.
In sum, these are only preferred application example of the present invention, be not intended to limit protection scope of the present invention.Within the spirit and principles in the present invention all, any amendment made, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (7)
1., based on the diversity receiving method automatically regulating weights, it is characterized in that: comprise the following steps:
1) each hardware circuit respectively Real-Time Monitoring its with the connection status of the RF cable of each diversity path, determine whether that allocative efficiency weights distinguished by each diversity path according to connection status; The relative intensity of real-time calculating each diversity path Received signal strength;
2) be that each diversity path distributes weights respectively according to the comparative result of relative intensity and predetermined threshold range; Process and filtering process are mutually asked respectively to the Received signal strength of relative intensity in predetermined threshold range of each diversity path signal, after each process, all signal is prevented to the spacing process of spilling; Using filtering process and spacing after signal as the last solution tonal signal of each diversity path;
3) weights distributed by each diversity path and last solution tonal signal carry out diversity merging.
2. a kind of diversity receiving method based on automatically regulating weights according to claim 1, is characterized in that: described step 1) in hardware circuit diversity supply access on use double-triode valve to do break-make to control and short-circuit protection; The operation amplifier circuit detection path electric current of hardware circuit simultaneously, is converted to level change, judges the connection status of RF cable according to the height of level by curent change.
3. a kind of diversity receiving method based on automatically regulating weights according to claim 1, it is characterized in that: described step 1) according to connection status determine whether each diversity path respectively allocative efficiency weights be specially: if connect good, then it is effective for arranging weights; If diversity path disconnects, then it is invalid for arranging weights.
4. a kind of diversity receiving method based on automatically regulating weights according to claim 1, it is characterized in that: described step 1) in calculate in real time each diversity path Received signal strength relative intensity be specially: the I datum of the Received signal strength of each diversity path and Q data are asked respectively and square to be added again, the result obtained is as relative intensity.
5. a kind of diversity receiving method based on automatically regulating weights according to claim 1, it is characterized in that: described step 2) in be that each diversity path distributes weights respectively and is specially according to the comparative result of relative intensity and pre-determined threshold: if relative intensity is lower than default low threshold, the weights of this diversity path are set for presetting threshold ones; If relative intensity is in predetermined threshold range, weights are set according to relative intensity size; If relative intensity is higher than default high threshold, the weights of this diversity path are set for presetting high threshold.
6. a kind of diversity receiving method based on automatically regulating weights according to claim 1, it is characterized in that: described step 2) in all prevent the spacing process of overflowing to be specially to signal after each process: judges whether the numerical value of signal overflows after each process, if overflowed, spacing process is carried out to this signal; Otherwise this signal remains unchanged.
7. a kind of diversity receiving method based on automatically regulating weights according to claim 1, it is characterized in that: described step 3) be specially: the last solution tonal signal of each diversity path is multiplied by its weights and by the product addition of all diversity paths, then by the result of addition divided by each diversity path weights and obtain the result that diversity merges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510280253.3A CN105007110B (en) | 2015-05-27 | 2015-05-27 | A kind of diversity receiving method based on automatic adjustment weights |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510280253.3A CN105007110B (en) | 2015-05-27 | 2015-05-27 | A kind of diversity receiving method based on automatic adjustment weights |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105007110A true CN105007110A (en) | 2015-10-28 |
| CN105007110B CN105007110B (en) | 2018-08-21 |
Family
ID=54379646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510280253.3A Active CN105007110B (en) | 2015-05-27 | 2015-05-27 | A kind of diversity receiving method based on automatic adjustment weights |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105007110B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109257149A (en) * | 2017-07-12 | 2019-01-22 | 深圳市中兴微电子技术有限公司 | A kind of data receiver method and data reception device |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09214410A (en) * | 1996-01-31 | 1997-08-15 | Mitsubishi Electric Corp | Diversity receiver |
| CN1209694A (en) * | 1997-06-26 | 1999-03-03 | 日本电气株式会社 | Synthetic diversity receiving system capable of avoiding reduction of receiving sensitivity |
| CN1728611A (en) * | 2004-07-28 | 2006-02-01 | 中兴通讯股份有限公司 | Real time centralized monitoring device for channels in radio frequency in time division duplexing system |
| CN2773705Y (en) * | 2005-03-22 | 2006-04-19 | 刘天舒 | Antenna connecting line inspector |
| CN101119141A (en) * | 2006-08-03 | 2008-02-06 | 大唐移动通信设备有限公司 | Method for setting controller local network identification of antennafier unit and macro base station |
| CN101340229A (en) * | 2001-07-27 | 2009-01-07 | 自由度半导体公司 | Diversity receiver and method thereof |
| CN103384962A (en) * | 2012-03-05 | 2013-11-06 | 华为终端有限公司 | Antenna switch circuit and wireless terminal device |
-
2015
- 2015-05-27 CN CN201510280253.3A patent/CN105007110B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09214410A (en) * | 1996-01-31 | 1997-08-15 | Mitsubishi Electric Corp | Diversity receiver |
| CN1209694A (en) * | 1997-06-26 | 1999-03-03 | 日本电气株式会社 | Synthetic diversity receiving system capable of avoiding reduction of receiving sensitivity |
| CN101340229A (en) * | 2001-07-27 | 2009-01-07 | 自由度半导体公司 | Diversity receiver and method thereof |
| CN1728611A (en) * | 2004-07-28 | 2006-02-01 | 中兴通讯股份有限公司 | Real time centralized monitoring device for channels in radio frequency in time division duplexing system |
| CN2773705Y (en) * | 2005-03-22 | 2006-04-19 | 刘天舒 | Antenna connecting line inspector |
| CN101119141A (en) * | 2006-08-03 | 2008-02-06 | 大唐移动通信设备有限公司 | Method for setting controller local network identification of antennafier unit and macro base station |
| CN103384962A (en) * | 2012-03-05 | 2013-11-06 | 华为终端有限公司 | Antenna switch circuit and wireless terminal device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109257149A (en) * | 2017-07-12 | 2019-01-22 | 深圳市中兴微电子技术有限公司 | A kind of data receiver method and data reception device |
| CN109257149B (en) * | 2017-07-12 | 2021-05-28 | 深圳市中兴微电子技术有限公司 | Data receiving method and data receiving device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105007110B (en) | 2018-08-21 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103200062B (en) | A kind of CAN data transmitting/receiving equipment | |
| CN101483281B (en) | Method and apparatus for controlling terminal antenna | |
| KR101902900B1 (en) | Power path switching in an electronic device including a plurality of charging ports | |
| CN104348236A (en) | Wireless charging device and method | |
| CN104243721A (en) | Wireless communications circuit and impedance adjustment method thereof | |
| CN108174407B (en) | Communication control method and terminal | |
| CN105517096B (en) | A kind of relay selection method of more relaying amplification forward collaboration networks | |
| US20180054381A1 (en) | Method for Selecting Relay Station in Power Line Network, and Station | |
| CN104469654A (en) | Switching method and device of internal communication | |
| CN105007110A (en) | Diversity reception method based on automatically adjusted weight | |
| CN102710224A (en) | Multi-mode power amplifier and corresponding mobile communication equipment | |
| CN104135374A (en) | Powered device | |
| CN103516447B (en) | A kind of multi-antenna signal merging method and network equipment | |
| CN100487997C (en) | Method and system for realizing detection protection in far away power supply | |
| CN107342800B (en) | Downlink data sending method, device and base station | |
| CN103313223B (en) | A kind of method for controlling charging in D2D communication | |
| CN110958669B (en) | Intelligent terminal and power control method thereof | |
| CN205961112U (en) | Channel auto -change over device | |
| CN103002555B (en) | Binary channel downgoing signal power compensation method and device and transmitter | |
| CN201066904Y (en) | Interface communication circuit with anti-interference capability and mobile phone applying this circuit | |
| CN106533631B (en) | Multiple antennas decoding circuit | |
| CN212935772U (en) | RS485 communication automatic receiving and dispatching improved circuit | |
| CN218041372U (en) | Decoding circuit for decoding specific coded signal | |
| Lioumpas et al. | Another look at multibranch switched diversity systems | |
| CN113708942B (en) | Power receiving end control circuit for POE system and electronic equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |