CN1430423A - Method and device for realizing digital selection diversity - Google Patents
Method and device for realizing digital selection diversity Download PDFInfo
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Abstract
A method for realize digital selection diversity includes reading in a batch of demodulated receiving signal of two paths in continuous period, processing intensity indication detecting value of read-in receiving signal in two paths and selecting a signal of one path with higher intensity indicatino detecting value as temporary signal source, carrying on quality detection for received signal data of temporary signal source selecting antenna signal as per detecting result and waiting for processing data of received signal for next batch of continuous time. It has applied mode of "receiving first and selecting later" for radio signal in specific bit mode of multipath so that a signal of one path with high quality in reception can be selected in real time from received signal demodulated separately in multipath and to be used in the following process.
Description
Technical field:
The present invention relates to a kind of received signal that in the digital mobile communication system of time division multiplexing (TDMA), time division duplex (TDD), realizes and select the method and the device of diversity.Specifically, relate to method and the device of realizing selecting diversity in the system that the radio signal that receives has particular bit pattern and quality requirement strictness to received signal.
Background technology:
The application of diversity receiving technology in wireless environment is very extensive, and the wireless environment that this receiver is used for changing can overcome the signal fadeout that causes owing to multipath transmisstion effectively, improves the quality of reception of radio signal at all.Deversity scheme is varied, and the selecting type diversity is a method more effective and simple in numerous diversity techniques.The diversity technique of other method such as combination type, though effect is better than the selecting type diversity, the requirement of, hardware soft to system is than higher, for example: require between the received signal good synchronously etc., this has increased the difficulty on receiver circuit is realized undoubtedly.
In addition, along with high performance appearance of digital signal processor, realize that with software the method for hardware circuit function is used more and more at large, this makes software realize dividing and is integrated into possibility, can allow the flexibility of system better, also be easy to add new function and algorithm.
The Chinese patent publication number is that the document of CN1064202C, CN1091560A and United States Patent (USP) 889668,010112 discloses: antenna diversity system adopts switching mode to realize selective reception at the antenna place with switch; But this technical scheme only is applicable to the single-receiver system.
Though the Chinese patent publication number is the selection diversity mode that the disclosed technical scheme of the document of CN1132012A and CN1176544A relates to multipath receiver, but this scheme is to carry out selective reception switching time with hardware circuit control before demodulation, or lays particular emphasis on hardware differentiation received signal intensity and in proper order for selecting according to realization.
Application No.: 667931, the multipath reception system of describing in 182063 the open source literature, main level and the noise level that detects received signal, realize relatively and selection with circuit, perhaps lay particular emphasis on same signal by multi-channel demodulator, relatively the multichannel demodulation result determine effect best a road.
Known selection diversity mode has at present:
A., a double antenna spatial diversity system is set, this double antenna is coupled on the alteration switch, the selection of carrying out antenna when antenna received signal performance is lower than a predetermined threshold is switched, and a certain road signal in the double antenna is selected to be coupled on the single receiver according to certain criterion.
The defective of this method is: owing to have only single receiver, therefore can only at a time select to obtain the received signal of No. one antenna according to the judgement of middle a little information (as synchronization character) quality to received signal, can only accomplish " prediction " to another road signal, therefore, as long as the performance of current selected signal satisfies set thresholding, just this signal can be selected for use always, and the signal of a road best antenna of performance can't be accomplished always to select for use.In other words, the signal selected for use of this method is " available signal " but not " optimum signal ".
B., the system of double antenna space diversity is set, is coupled to respectively on the two-way receiver, select one tunnel " the best " output signal to be used for demodulation with switch.
This method obviously is better than the performance of the method for single receiver for diversity reception.But owing to utilize hardware switch to realize selecting, if switch, then can cause the discontinuous of signal between the signal transmission period, this selection is generally finished in the protection spacer segment; In addition, in order to realize real-time selection, need the two-way received signal can accomplish on the sequential synchronously, otherwise, when switching, can lose code element.Just need to add the circuit that some control switching time in order to obtain accurate sequential relationship, this has particular bit pattern in received signal but criticizes the duration and lack (as in the microsecond level), and in the differentiated system of channel type difference specific bit part, increased the complexity of system undoubtedly and realized difficulty.
In addition, two kinds of traditional receptions selection diversity modes all are " select earlier, receive " in a sense more than---promptly, select again whether in time to switch to receive information data earlier according to the leading or synchronization character estimation quality of reception of signal.Such method requires to judge for fast change multipath environment fast, makes a decision after therefore just can not doing accumulation to criterion again, thereby makes system be subject to the influence of isolated noise pulse and produce the mistake switching; Quadrature makes a decision after tired a period of time more again for becoming multipath environment slowly, and therefore traditional selection diversity reception mode can't be applicable to fast change simultaneously and become in the multipath environment slowly.
Summary of the invention:
Main purpose of the present invention is to propose a kind of method and device thereof of realizing digital selection diversity, the radio signal that has a particular bit pattern for multichannel (for example: the mode that the radio signal of time division multiplexing (TDMA), time division duplex (TDD) system) adopts " receive earlier, select ", according to many measurable criterions (comprising the information that received signal itself is comprised), select the good signal of one tunnel quality of reception to be used for subsequent treatment the demodulated received signal respectively from multichannel in real time.
Another object of the present invention is to propose a kind of method and device thereof of realizing digital selection diversity, and it does not require multipath reception signal strict synchronism on sequential, reduces the complexity of system and realizes difficulty.
Another purpose of the present invention is to propose a kind of method and device thereof of realizing digital selection diversity, and it makes a decision after can doing accumulation to criterion again, thereby makes system not be subject to the influence of isolated noise pulse and produce mistake and switch; And can be applicable to fast change and the multipath environment that becomes slowly simultaneously.
The object of the present invention is achieved like this:
A kind of method that realizes digital selection diversity comprises the steps:
Step 1: read in one batch of two-way in the lasting cycle through the demodulated received signal;
Step 2: the intensity indication of the two-way received signal that step 1 is read in (Receive SignalStrength Indication is called for short RSSI) detected value processes, and selects the big signal of one road RSSI value in advance as temporary transient signal source;
Step 3: to carrying out quality testing as the received signal data of temporary transient signal source;
Step 4: carry out the selection of aerial signal according to the quality testing result in the step 3;
Step 5: the received signal data that wait the pending next group duration.
Above-mentioned step 2 specifically comprises following step:
Step 201: the RSSI value of reading in the two-way received signal in a collection of duration;
Step 202:, remove averaged after maximum, the minimum value to the RSSI value of this two-way received signal;
Step 203: judge whether the RSSI value of first via received signal is not less than the RSSI value of the second tunnel received signal, if not, execution in step 205; Otherwise continue;
Step 204: select first via received signal as temporary transient signal source, execution in step 206;
Step 205: select the second tunnel received signal as temporary transient signal source;
Step 206: finish.
The described selection of above-mentioned step 3 specifically comprises following step:
Step 301: the received signal data of reading in the temporary transient signal source in a collection of duration;
Step 302: search synchronization character;
Step 303: the bit error of judging synchronization character in allowed limits, if then continue; Otherwise finish;
Step 304: data are done CRC check to the received signal;
Step 305: judge whether CRC check is correct,, otherwise finish if correctly then continue;
Step 306: select for use these reception data as subsequent treatment; Execution in step 5.
Above-mentioned step 4 specifically comprises following step:
Step 401: judge whether that two paths of signals all selected; Be then to continue, otherwise execution in step 406;
Step 402: the data in this batch duration abandon;
Step 403: mistake frame statistical counting adds 1;
Step 404: whether mistake frame statistics surpasses the thresholding of a regulation; Be then to continue, otherwise execution in step 5;
Step 405: change reception frequency or receiving slot, execution in step 5;
Step 406: select another road received signal as temporary transient signal source; Execution in step 3.
Described two-way received signal is received by the receiver of two-way antenna feed and connection separately thereof respectively.
Described two-way received signal is carried out demodulation respectively obtaining corresponding signal data by two demodulating units of the output that is connected respectively to the two-way receiver, and stores first memory cell into; The RSSI value of two-way received signal is handled by two separate RSSI detecting units respectively, and stores second memory cell into.
Described digital selection diversity is handled by carrying out the selecting type diversity with first memory cell and the second memory cell linking number word signal processor.
Described signal is the radio signal with particular bit pattern; This has fixing batch duration information and leading, suffix information at least.
A kind of device of realizing digital selection diversity comprises at least:
First antenna feed of space diversity and second antenna feed be used to receive the radio signal of spatial transmission, and the received signal between them are uncorrelated mutually;
The two-way receiver is used for being connected with second antenna feed with first antenna feed respectively, in order to receive data from corresponding antenna feed;
The two-way demodulating unit is connected respectively to the output of two-way receiver, and the received signal of two-way receiver output is carried out demodulation respectively to obtain data;
Two-way received signal field intensity indicated value detecting unit links to each other with the two-way receiver respectively, is used to detect the intensity of two-way received signal;
First memory cell is connected with the two-way demodulating unit, is used to store the two-way received signal data after the demodulation;
Second memory cell is connected with detecting unit, is used to store the receiving intensity detected value of two paths of signals;
Digital signal processor is connected with first memory cell, second memory cell, is used for carrying out to the received signal the selecting type diversity and handles;
Read-only memory unit is connected with digital signal processor, is used to store the executive program of digital signal processor.
The selecting type diversity that above-mentioned digital signal processor carries out is to the received signal handled and is comprised:
Digital signal processor reads in one batch of two-way in the lasting cycle through the demodulated received signal from first memory cell, second memory cell;
Digital signal processor processes the intensity indication RSSI detected value of the two-way received signal of reading in, and selects the big signal of one road RSSI value in advance as temporary transient signal source;
Digital signal processor is to carrying out quality testing as the received signal data of temporary transient signal source;
Digital signal processor is selected aerial signal according to above-mentioned quality testing result;
The received signal data of pending next group duration such as digital signal processor.
Digital signal processor processes the intensity indication RSSI detected value of the two-way received signal of reading in, and selects the big signal of one road RSSI value in advance and comprises as the concrete operations of signal source temporarily:
Digital signal processor reads in the RSSI value of the two-way received signal in a collection of duration from first memory cell, second memory cell;
Digital signal processor is to the RSSI value of this two-way received signal, removes averaged after maximum, the minimum value;
Digital signal processor judges whether the RSSI value of first via received signal is not less than the RSSI value of the second tunnel received signal, if not, finish after just selecting the second tunnel received signal as temporary transient signal source; Otherwise, select first via received signal as temporary transient signal source, finish.
Digital signal processor to carrying out quality testing as the received signal data of temporary transient signal source is:
Digital signal processor reads in the received signal data of the temporary transient signal source in a collection of duration from first memory cell, second memory cell;
Digital signal processor is from this received signal data search synchronization character;
In allowed limits whether the bit error that digital signal processor is judged synchronization character; If in allowed limits, digital signal processor data is to the received signal done CRC check, judge then whether the CRC check result is correct, CRC check result is correct, after then selecting the data of these reception data for use as subsequent treatment, the received signal data of pending next group duration such as digital signal processor; If digital signal processor directly finishes not in allowed limits;
Digital signal processor selects aerial signal specifically to comprise according to the quality testing result:
Digital signal processor judges whether two paths of signals all selected;
If digital signal processor abandons the data of this batch in the duration, the frame statistical counting adds 1 by mistake then; Digital signal processor judges whether mistake frame statistics surpasses the thresholding of a regulation, be the received signal data of pending next group duration such as after change receiving frequency or receiving slot then, not the received signal data of pending next group duration such as digital signal processor is direct;
Otherwise digital signal processor selects another road received signal as temporary transient signal source; Digital signal processor is to carrying out quality testing as the received signal data of temporary transient signal source.Described signal is the radio signal with particular bit pattern; This has leading, suffix information that fixing batch duration information reaches at least.
The present invention is by the method and the device thereof of above-mentioned realization digital selection diversity, the radio signal that has a particular bit pattern for multichannel (for example: time division multiplexing (TDMA), the radio signal of time division duplex (TDD) system) adopted the mode of " receiving earlier; select again ", according to the many measurable criterion that comprises information that received signal itself comprises, can select the good signal of one tunnel quality of reception and be used for subsequent treatment the demodulated received signal respectively from multichannel in real time, the present invention does not require multipath reception signal strict synchronism on sequential, so reduced the complexity of system and realized difficulty; Owing to make a decision again after can doing accumulation to criterion, thereby make system not be subject to the influence of isolated noise pulse and produce mistake and switch; And can be applicable to fast change and the multipath environment that becomes slowly simultaneously, there is not the problem of " preceding once selection is relevant with received signal quality subsequently ".
The present invention has the performance that multipath reception system is better than the single channel receiver, requirement to the hardware controls part is simple relatively, simultaneously, solve traditional multipath receiver with selection scheme flexibly again and selected defective in the diversity scheme, make the present invention for the signal with particular bit pattern can carry out in real time, flexibly, the selection optimized, accomplish " seamless soft handover ".
Because received signal of the present invention has specific bit mode, but under identical bit mode according to different channel types, difference during each several part lasting in the signal mode, if select the words of diversity with hardware, certainly will need to distinguish the received signal of different channels type, in order to avoid mistake is switched between the signal transmission period, but make the control complexity of hardware circuit reduce by the mode that software is selected, and the flexibility of system is better, can specify the selection foundation of different criterions according to different received signal character as aerial signal, thereby the scope of application is wider, and is simultaneously also simple.
The present invention is described in further detail below in conjunction with accompanying drawing and specific embodiment:
Description of drawings:
Fig. 1 is the main flow schematic diagram of the inventive method.
Fig. 2 is the preselected flow chart of antenna of the present invention.
Fig. 3 is an aerial signal quality testing process chart of the present invention.
Fig. 4 is an aerial signal chooser program flow diagram of the present invention.
Fig. 5 has the circuit block diagram of the digital selection diversity receiving system of selecting diversity reception for the present invention's one most preferred embodiment.
Fig. 6 is the timing schematic diagram of a data communication code form of most preferred embodiment of the present invention.
Fig. 7 is the preprogrammed read-only memory hardware configuration of a present invention schematic diagram.
Embodiment:
Referring to Fig. 1, Fig. 5, it is the schematic flow sheet of the selection diversity receiving method of the present invention's one most preferred embodiment.This flow process comprises:
Step 1 a: received signal of criticizing in the duration of from memory cell 509, reading in the two-way received signal respectively;
Step 2: carry out the preselected processing of antenna, it is according to the temporary transient signal source of received signal intensity indication selection one tunnel received signal conduct;
Step 3: whether carry out signal quality and detect, it is available promptly to differentiate selected received signal quality;
Step 4: carry out the selection of aerial signal according to the quality testing result in the step 3;
Step 5: the selection diversity reception of finishing this batch duration is handled, and waits for the received signal in next group processing time.
Referring to Fig. 2, Fig. 5, it is the flow chart of the preselected processing of antenna in the present invention's one most preferred embodiment, and this flow process is specially:
Step 201: a RSSI value of criticizing in the duration that from second memory cell 510, reads the two-way received signal by digital signal processor;
Step 202: the RSSI value of two-way received signal removed respectively to ask on average after maximum, the minimum value (can get rid of cas fortuit like this, as factors such as interference;
Step 203: judge whether the RSSI value of first via received signal is not less than the RSSI value of the second tunnel received signal, if not, execution in step 205; Otherwise continue;
Step 204: select first via received signal as temporary transient signal source, execution in step 206;
Step 205: select the second tunnel received signal as temporary transient signal source;
Step 206: finish.
Referring to Fig. 3, Fig. 5, the flow chart that its signal quality of the present invention detects, concrete step is:
Step 301: digital signal processor 511 reads in the data of the received signal that is elected to be temporary transient signal source from first memory cell 509;
Step 302: carry out the search of synchronization character; (for example 32 bits are determined its original position earlier, and each search can be offset 1 bit backward, can be offset 16 bits at most; Search Results requires synchronization character wrong 1 bits at most, and whether synchronization character searches indicates whether this time division multiplexing (TDMA) system has received desirable signal in initial batch duration this particular moment.
Step 303: judge whether to have searched synchronization character, if " not being " then finishes; If judged result has searched synchronization character, then execution in step 304;
Step 304: do CRC check to the received signal;
Step 305: judge the CRC check result, if " correctly " illustrates that then the signal data that is received does not have error of transmission, execution in step 306; If judge that the CRC check result is " incorrect ", show that then " distortion " takes place this road received signal as temporary transient signal source in transmission course, unavailable concerning native system, then finish.
Step 306: temporary transient signal source is at this moment sent into subsequent treatment, execution in step 5 as the received signal of choosing.
Referring to Fig. 4, it is the flow chart of aerial signal selection control unit of the present invention, and this processing unit mainly responds when the undesirable situation of selected antenna receiving signal quality testing, and it specifically comprises:
Step 401: whether the two-way received signal had all been done quality testing when now selecting received signal quality undesirable has assessed in judgement, " if not being ", then execution in step 406, if judged result is that the two-way received signal had all been done quality testing, and when all undesirable, execution in step 402;
Step 402: the data in this batch duration abandon;
Step 403: in the error statistics counting, add 1;
Step 404: judge whether corresponding error statistics value has surpassed a thresholding of setting in a period of time,, otherwise return main program execution in step 5 if surpass then execution in step 405 of thresholding.
Step 405: change reception frequency or receiving slot, return the step 5 of main program;
Step 406: select for use another road received signal as temporary transient signal source, carry out new received signal quality and detect assessment; Carry out the step 3 of main program.
This shows that the received signal of selecting by this method must be optimum, ideal situation is to have big RSSI value, and free from error received signal.Take second place for error free but RSSI value might less signal because this moment RSSI value big a road possiblely cause the non-conformity of quality of received signal to close the use standard because having introduced interference with signal equality strength.
Received signal in the most preferred embodiment of the present invention has strict requirement to service quality, and the information data CRC check can not be wrong, and synchronization character only allows the error of 1 bit.For require not so strict system can be when received signal all has error the Select Error counting less a road.
Referring to Fig. 5, it is the schematic block circuit diagram of the device 500 of realization digital selection diversity of the present invention; It comprises two antenna feeds 501,505, and the distance between them has guaranteed that the received signal of the two is uncorrelated.Antenna feed 501 is coupled on the receiver 502, as the input signal source of receiver 502; Antenna feed 505 is coupled on the receiver 506, as the input signal source of receiver 506.Received signal intensity indication (RSSI) unit 504 is coupled on the receiver 502, detect the intensity of the received signal on the antenna feed 501, after analog-to-digital conversion and sampling, output to and be coupled on second memory cell 510, the received signal intensity detection value on the antenna feed 501 is stored in second memory cell 510; Received signal intensity indication (RSSI) unit 508 is coupled on the receiver 506, detect the intensity of the received signal on the antenna feed 505 in real time, after analog-to-digital conversion and sampling, its output is coupled on second memory cell 510, and the received signal intensity detection value on the antenna feed 505 is stored in second memory cell 510.The dateout of received signal intensity indication (RSSI) unit 504 and received signal intensity indication (RSSI) unit 508 is stored in the different address fields in second memory cell 510.Second memory cell 510 is coupled on the digital signal processor 511, selects diversity that two-way received signal intensity designation data is provided with thinking that digital signal processor 511 is carried out.
Demodulating unit 503 is coupled on the receiver 502, and for the received signal of receiver 502 is done demodulation, first memory cell 509 is coupled to the output of demodulating unit 503, is used to store the data after the demodulation; Demodulating unit 507 is coupled on the receiver 506, and for the signal that receiver 506 receives is done demodulation, first memory cell 509 is coupled to the output of demodulating unit 507, is used to store the data after the demodulation.The different address fields of storage in first memory cell 509 after demodulating unit 503 and demodulating unit 507 demodulation.First memory cell 509 is coupled on the digital signal processor 511 simultaneously, selects diversity for it received signal data are provided.
Digital signal processor is also connected on the read-only memory 512, and these read-only memory 512 internal memories contain the program of the selection diversity of digital signal processor 511 operations.
Digital signal processor in the present embodiment is by the DSP device of the TMS320C54X series of Texas Instruments's production, need not to increase the external data storage space, and is real-time.First memory cell 509 and second memory cell 510 can consider to use programmable logic array (for example: FPGA) make up.
Referring to Fig. 6, it is having particular bit pattern and criticizing the received signal form in the cycle of continuing in the present embodiment.This signal is the radio signal of time division multiplexing (TDMA), time division duplex (TDD) system, follows the STD28 agreement.Its batch duration is 625 microseconds, is called a time slot (slot).Wherein synchronization character 601 is known bit combinations (32bit), allows the error of 1 bit; Information data 602 is a data division; Whether the CRC check result who when CRC check result 603 sends data for transmitting terminal the every bit of information data is done is in recipient's verification once more, reliable in order to the data that judgement receives.Use whether conformance with standard of quality that these customizing messages can definite judge go out received signal.Received signal is made up of continuous 4 time slots (slot) signal as above-mentioned pattern, next is that same continuous 4 time slots (slot) sets of signals as above-mentioned pattern becomes transmitting corresponding to the received signal time slot.8 time slot signals are formed a frame structure, need 5ms to finish transmission altogether.Other signal modes with above-mentioned signal characteristic are also applicable to method of the present invention and device.
Referring to Fig. 7, it is the internal structure signal 700 of read-only memory unit 512, comprising main hardware module 701, is used for Control Software and selects the diversity reception process; The preselected processing unit 1 of antenna is in order to indicate (RSSI) preselected one tunnel received signal as temporary transient signal source according to received signal intensity; Received signal quality detecting unit 2 is judged in order to detect synchronization character and crc error, to determine signal quality; Aerial signal is selected control unit 3, in order to the control of response when the temporary transient signal source non-conformity of quality standardization.
It should be noted last that: above embodiment is the unrestricted technical scheme of the present invention in order to explanation only, although the present invention is had been described in detail with reference to the foregoing description, those of ordinary skill in the art is to be understood that: still can make amendment or be equal to replacement the present invention, and not breaking away from any modification or partial replacement of the spirit and scope of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.
Claims (15)
1, a kind of method that realizes digital selection diversity, it is characterized in that: this method comprises the steps:
Step 1: read in one batch of two-way in the lasting cycle through the demodulated received signal;
Step 2: intensity indication (RSSI) detected value of the two-way received signal that step 1 is read in processes, and selects the big signal of one road RSSI value in advance as temporary transient signal source;
Step 3: to carrying out quality testing as the received signal data of temporary transient signal source;
Step 4: carry out the selection of aerial signal according to the quality testing result in the step 3;
Step 5: the received signal data that wait the pending next group duration.
2, the method for realization digital selection diversity according to claim 1 is characterized in that: step 2 specifically comprises following step:
Step 201: the RSSI value of reading in the two-way received signal in a collection of duration;
Step 202:, remove averaged after maximum, the minimum value to the RSSI value of this two-way received signal;
Step 203: judge whether the RSSI value of first via received signal is not less than the RSSI value of the second tunnel received signal, if not, execution in step 205; Otherwise continue;
Step 204: select first via received signal as temporary transient signal source, execution in step 206;
Step 205: select the second tunnel received signal as temporary transient signal source;
Step 206: finish.
3, the method for realization digital selection diversity according to claim 1 is characterized in that: the described selection of step 3 specifically comprises following step:
Step 301: the received signal data of reading in the temporary transient signal source in a collection of duration;
Step 302: search synchronization character;
Step 303: the bit error of judging synchronization character in allowed limits, if then continue; Otherwise finish;
Step 304: data are done CRC check to the received signal;
Step 305: judge whether CRC check is correct,, otherwise finish if correctly then continue;
Step 306: select for use these reception data as subsequent treatment; Execution in step 5.
4, the method for realization digital selection diversity according to claim 1 is characterized in that: step 4 specifically comprises following step:
Step 401: judge whether that two paths of signals all selected; Be then to continue, otherwise execution in step 406;
Step 402: the data in this batch duration abandon;
Step 403: mistake frame statistical counting adds 1;
Step 404: whether mistake frame statistics surpasses the thresholding of a regulation; Be then to continue, otherwise execution in step 5;
Step 405: change reception frequency or receiving slot, execution in step 5;
Step 406: select another road received signal as temporary transient signal source; Execution in step 3.
5, according to the method for claim 1 or 2 or 4 described realization digital selection diversities, it is characterized in that: described two-way received signal is received by the receiver of two-way antenna feed and connection separately thereof respectively.
6, the method for realization digital selection diversity according to claim 1 and 2, it is characterized in that: described two-way received signal is carried out demodulation respectively obtaining corresponding signal data by two demodulating units of the output that is connected respectively to the two-way receiver, and stores first memory cell into.
7, the method for realization digital selection diversity according to claim 1 and 2 is characterized in that: the RSSI value of described two-way received signal is handled by two separate RSSI detecting units respectively, and stores second memory cell into.
8, the method for realization digital selection diversity according to claim 1 and 2 is characterized in that: described digital selection diversity is handled by carrying out the selecting type diversity with first memory cell and the second memory cell linking number word signal processor.
9, according to claim 1 or 2 or the method for 3 or 4 described realization digital selection diversities, it is characterized in that: described signal is the radio signal with particular bit pattern; At least has fixing batch duration information and leading, suffix information.
10, a kind of device of realizing digital selection diversity is characterized in that: which comprises at least:
First antenna feed of space diversity and second antenna feed be used to receive the radio signal of spatial transmission, and the received signal between them are uncorrelated mutually;
The two-way receiver is used for being connected with second antenna feed with first antenna feed respectively, in order to receive data from corresponding antenna feed;
The two-way demodulating unit is connected respectively to the output of two-way receiver, and the received signal of two-way receiver output is carried out demodulation respectively to obtain data;
Two-way received signal field intensity indicated value detecting unit links to each other with the two-way receiver respectively, is used to detect the intensity of two-way received signal;
First memory cell is connected with the two-way demodulating unit, is used to store the two-way received signal data after the demodulation;
Second memory cell is connected with detecting unit, is used to store the receiving intensity detected value of two paths of signals;
Digital signal processor is connected with first memory cell, second memory cell, is used for carrying out to the received signal the selecting type diversity and handles;
Read-only memory unit is connected with digital signal processor, is used to store the executive program of digital signal processor.
11, the device of realization digital selection diversity according to claim 10 is characterized in that: the selecting type diversity that digital signal processor carries out is to the received signal handled and is comprised:
Digital signal processor reads in one batch of two-way in the lasting cycle through the demodulated received signal from first memory cell, second memory cell;
Digital signal processor processes the intensity indication RSSI detected value of the two-way received signal of reading in, and selects the big signal of one road RSSI value in advance as temporary transient signal source;
Digital signal processor is to carrying out quality testing as the received signal data of temporary transient signal source;
Digital signal processor is selected aerial signal according to above-mentioned quality testing result;
The received signal data of pending next group duration such as digital signal processor.
12, the device of realization digital selection diversity according to claim 11, it is characterized in that: digital signal processor processes the intensity indication RSSI detected value of the two-way received signal of reading in, and selects the big signal of one road RSSI value in advance and comprises as the concrete operations of signal source temporarily:
Digital signal processor reads in the RSSI value of the two-way received signal in a collection of duration from first memory cell, second memory cell;
Digital signal processor is to the RSSI value of this two-way received signal, removes averaged after maximum, the minimum value;
Digital signal processor judges whether the RSSI value of first via received signal is not less than the RSSI value of the second tunnel received signal, if not, finish after just selecting the second tunnel received signal as temporary transient signal source; Otherwise, select first via received signal as temporary transient signal source, finish.
13, the device of realization digital selection diversity according to claim 11 is characterized in that: digital signal processor to carrying out quality testing as the received signal data of temporary transient signal source is:
Digital signal processor reads in the received signal data of the temporary transient signal source in a collection of duration from first memory cell, second memory cell;
Digital signal processor is from this received signal data search synchronization character;
In allowed limits whether the bit error that digital signal processor is judged synchronization character; If in allowed limits, digital signal processor data is to the received signal done CRC check, judge then whether the CRC check result is correct, CRC check result is correct, after then selecting the data of these reception data for use as subsequent treatment, the received signal data of pending next group duration such as digital signal processor; If digital signal processor directly finishes not in allowed limits;
14, the device of realization digital selection diversity according to claim 11 is characterized in that: digital signal processor selects aerial signal specifically to comprise according to the quality testing result:
Digital signal processor judges whether two paths of signals all selected;
If digital signal processor abandons the data of this batch in the duration, the frame statistical counting adds 1 by mistake then; Digital signal processor judges whether mistake frame statistics surpasses the thresholding of a regulation, be the received signal data of pending next group duration such as after change receiving frequency or receiving slot then, not the received signal data of pending next group duration such as digital signal processor is direct;
Otherwise digital signal processor selects another road received signal as temporary transient signal source; Digital signal processor is to carrying out quality testing as the received signal data of temporary transient signal source.
15, according to claim 10 or 11 or 12 or the device of 13 or 14 described realization digital selection diversities, it is characterized in that: described signal is the radio signal with particular bit pattern; At least has leading, suffix information that fixing batch duration information reaches.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CNB011316683A CN1314276C (en) | 2001-12-31 | 2001-12-31 | Method and device for realizing digital selection diversity |
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| CNB011316683A CN1314276C (en) | 2001-12-31 | 2001-12-31 | Method and device for realizing digital selection diversity |
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| CN1314276C CN1314276C (en) | 2007-05-02 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7627301B2 (en) | 2006-02-17 | 2009-12-01 | Shenzhen Mindray Bio-Medical Electronics Co., Ltd. | Spatial diversity receiving device and input channel switching method |
| CN101837714A (en) * | 2010-03-31 | 2010-09-22 | 深圳市元征软件开发有限公司 | Tire pressure monitoring system with dual-polarization antenna and method for receiving and processing signal thereof |
| CN102315874A (en) * | 2011-10-18 | 2012-01-11 | 南京信息职业技术学院 | Short-range wireless communication package diversity method |
| CN102412873A (en) * | 2011-10-18 | 2012-04-11 | 南京信息职业技术学院 | Short-distance wireless telemetry PC diversity method |
| CN101563858B (en) * | 2006-12-20 | 2013-08-21 | 艾利森电话股份有限公司 | Method and arrangement for selecting an antenna mode in a mobile telecommunication network |
| CN103647593A (en) * | 2013-12-03 | 2014-03-19 | 广州市花都区中山大学国光电子与通信研究院 | Wireless diversity receiving method |
| CN105120364A (en) * | 2015-08-24 | 2015-12-02 | 天脉聚源（北京）科技有限公司 | Method for safety transmission of interaction signals of television interaction system |
| CN105163162A (en) * | 2015-08-29 | 2015-12-16 | 天脉聚源（北京）科技有限公司 | Method and device for information reception switching |
| CN105228021A (en) * | 2015-09-30 | 2016-01-06 | 天脉聚源（北京）科技有限公司 | A kind of transmission method of TV interaction systems interactive information |
| CN105245801A (en) * | 2015-09-24 | 2016-01-13 | 天脉聚源（北京）科技有限公司 | Method for transmitting interactive signals of interactive television system |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5325403A (en) * | 1992-12-09 | 1994-06-28 | Motorola, Inc. | Method and apparatus for dual-channel diversity reception of a radio signal |
| JPH09191305A (en) * | 1996-01-10 | 1997-07-22 | Matsushita Electric Ind Co Ltd | Diversity receiver |
| JPH09284192A (en) * | 1996-04-19 | 1997-10-31 | Kyocera Corp | Diversity reception method and diversity receiver |
| JP2000295150A (en) * | 1999-04-02 | 2000-10-20 | Matsushita Electric Ind Co Ltd | Diversity receiver |
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- 2001-12-31 CN CNB011316683A patent/CN1314276C/en not_active Expired - Fee Related
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| US7627301B2 (en) | 2006-02-17 | 2009-12-01 | Shenzhen Mindray Bio-Medical Electronics Co., Ltd. | Spatial diversity receiving device and input channel switching method |
| CN101563858B (en) * | 2006-12-20 | 2013-08-21 | 艾利森电话股份有限公司 | Method and arrangement for selecting an antenna mode in a mobile telecommunication network |
| CN101837714A (en) * | 2010-03-31 | 2010-09-22 | 深圳市元征软件开发有限公司 | Tire pressure monitoring system with dual-polarization antenna and method for receiving and processing signal thereof |
| CN101837714B (en) * | 2010-03-31 | 2015-01-21 | 深圳市元征软件开发有限公司 | Tire pressure monitoring system with dual-polarization antenna and method for receiving and processing signal thereof |
| CN102315874B (en) * | 2011-10-18 | 2014-03-12 | 南京信息职业技术学院 | Short-range wireless communication package diversity method |
| CN102412873B (en) * | 2011-10-18 | 2014-03-12 | 南京信息职业技术学院 | Short-distance wireless telemetry PC diversity method |
| CN102412873A (en) * | 2011-10-18 | 2012-04-11 | 南京信息职业技术学院 | Short-distance wireless telemetry PC diversity method |
| CN102315874A (en) * | 2011-10-18 | 2012-01-11 | 南京信息职业技术学院 | Short-range wireless communication package diversity method |
| CN103647593A (en) * | 2013-12-03 | 2014-03-19 | 广州市花都区中山大学国光电子与通信研究院 | Wireless diversity receiving method |
| CN105120364A (en) * | 2015-08-24 | 2015-12-02 | 天脉聚源（北京）科技有限公司 | Method for safety transmission of interaction signals of television interaction system |
| CN105163162A (en) * | 2015-08-29 | 2015-12-16 | 天脉聚源（北京）科技有限公司 | Method and device for information reception switching |
| CN105245801A (en) * | 2015-09-24 | 2016-01-13 | 天脉聚源（北京）科技有限公司 | Method for transmitting interactive signals of interactive television system |
| CN105228021A (en) * | 2015-09-30 | 2016-01-06 | 天脉聚源（北京）科技有限公司 | A kind of transmission method of TV interaction systems interactive information |
| CN105228021B (en) * | 2015-09-30 | 2018-09-25 | 天脉聚源（北京）科技有限公司 | A kind of transmission method of TV interaction systems interactive information |
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| CN1314276C (en) | 2007-05-02 |
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