CN1153396C - Diversity receiver - Google Patents
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- CN1153396C CN1153396C CNB961231319A CN96123131A CN1153396C CN 1153396 C CN1153396 C CN 1153396C CN B961231319 A CNB961231319 A CN B961231319A CN 96123131 A CN96123131 A CN 96123131A CN 1153396 C CN1153396 C CN 1153396C
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Abstract
To provide the diversity receiver in which adverse effect by a disturbing (U) wave is reduced. A radio wave received by antennas 11,12-1N is fed to detection sections 21,22-2N, in which the radio wave is detected and reception electric field level (RSSI) is measured. Demodulation information as a result of the detection by the detection sections 21,22-2N is outputted to a diversity processing section 100 and the RSSI information measured by the detection sections 21-2N is outputted to A/D converter sections 31-3N. Based on two point timing in burst timing points outputted from a timing instruction section 300, the A/D converter sections 31,32-3N apply A/D-conversion to the timing of two points, calculation sections 41,42-4N obtain a change amount of the RSSI information in both the timing signals and discrimination sections 51,52-5N compare the change in the RSSI information with a leading threshold level to discriminate whether or not the radio wave is a disturbing wave. The input having been discriminated is seen as invalid.
Description
Technical field
The present invention relates to diversity receiver, particularly relate to and in communication field, carry out diversity reception and be particularly related to the radio device that TDMA (time division multiple access inserts and connects) transmitting-receiving mode is communicated by letter.
Background technology
Figure 13 illustrates the structure of general diversity receiver.As shown in Figure 3, each branch road 1,2 ... N by a plurality of antennas 11 that receive electric wave, 12...1N and with each antenna 11,12...1N is corresponding measures the detection section 21, the 22...2N that receive electric field level (hereinafter referred to as RSSI) when carrying out detection and constitute.Existing diversity receiver is delivering to diversity processing section 100 from the detection section 21 of each branch road 1,2...N, demodulating information and the RSSI information that 22...2N obtains, the diversity that diversity processing section 100 carries out demodulating information according to RSSI information is handled, the demodulating data that this diversity has been handled is delivered to and is received data processing division 200, receives the processing of data in receiving data processing division 200 according to above-mentioned demodulating data.
The following describes the work of existing diversity receiver shown in Figure 13.
The electric wave that receives with a plurality of antennas 11,12...1N carries out detection in corresponding with antenna respectively detection section 11,22...2N, measure its RSSI simultaneously.Demodulating information after the detection and RSSI information output to diversity processing section 100 from detection section 21,22...2N, carry out diversity according to the RSSI information of each branch road 1,2...N and handle in diversity processing section 100.The so-called diversity is here handled and referred to: the demodulating information that the branch road of maximum level for example only will be shown in the RSSI information of whole branch roads 1,2...N is considered as effectively, with its RSSI inadequately the demodulating information of the branch road of a certain level be considered as invalid, with being in proportion of the level of RSSI information the demodulating information of each branch road is weighted etc., thereby obtain demodulating data.
Demodulating data input after diversity is handled receives data processing division 200, receives the processing of data at this.
Therefore,,, also good reception sensitivity can be kept, the processing of stable reception data can be carried out even electric field level changes, the reception electric field level of several branch roads descends because of reasons such as decline receive if by existing diversity receiver.Here so-called decline refers to, because the Strength Changes of the caused radio signal of variation of the state of the interference of the different electric wave of propagation path or propagation path.
But, in existing diversity receiver shown in Figure 13, when the electric field strength by its U ripple under the situation that for example has disturbing wave (hereinafter referred to as the U ripple) of the some electric waves that receives among antenna 11, the 12...1N shows maximum level, make the branch road that has received its U ripple preferential, the demodulating information of this branch road is considered as effectively, handle its demodulating information, and export to receiving data processing section 200 as demodulating data.Therefore, receive the demodulating data that data processing section 200 is handled the U ripple, so in receiving data, will produce mistake sometimes.
Japanese documentation (clear 61-214634) discloses a kind of diversity receiver, it has extract the useful wave part from received signal, by a little less than additional and this useful wave correlation and the part of removing the disturbing wave narrower, can extract useful wave better than useful wave frequency band.
In existing diversity receiver, when some in a plurality of antennas receives the U ripple, may descend because of this U ripple make receiving sensitivity.
Summary of the invention
The present invention proposes in view of the above problems, and its objective is provides a kind of dysgenic diversity receiver that can alleviate the U ripple.
In order to overcome the above problems, diversity receiver of the present invention has following feature.
(1) it has a plurality of antennas that receive electric wave, be connected with each antenna respectively, in order to measure from a plurality of reception electric field level determination parts of the reception electric field level of the next reception ripple of described antenna, carry out diversity processing section and the interference wave judging portion that diversity is handled according to reception ripple that comes from described a plurality of antennas and described reception electric field level, this interference wave judging portion is according to establishing with each antenna is corresponding, poor according to the reception electric field level before and after the received pulse string forward position of obtaining by the output of described reception electric field level determination part, judge it receives in the ripple whether disturbing wave is arranged, simultaneously, limit the reception ripple that described diversity processing section input has been judged to be disturbing wave.
By the disturbing wave acceptance division to each antenna detection its whether receive ripple is disturbing wave (U ripple), and then the input of restriction diversity processing section has been judged to be the reception ripple of U ripple, therefore can prevent the mistake of the reception data that cause because of the U ripple.Thereby, can prevent the decline of the receiving sensitivity that causes because of disturbing wave, the harmful effect that alleviates disturbing wave.
(2) in the diversity receiver of above-mentioned (1) record, above-mentioned interference wave judging portion monitors above-mentioned reception electric field level in the front position of the received pulse string sequential that receives ripple.
That is, the interference wave detection unit can judge according to RSSI information whether this reception ripple is disturbing wave in the front position of the received pulse string sequential that receives ripple, so just know whether it is the U ripple when receiving.For this reason, the diversity that can promptly remove the reception ripple of U ripple is handled.
(3) in the diversity receiver of above-mentioned (2) record, and then also has a forward position threshold setting portion, the threshold value that reception electric field level forward position when set receiving the input of ripple received pulse string changes, the forward position threshold value that above-mentioned interference wave judging portion comes according to above-mentioned forward position threshold setting portion are judged and are received whether ripple is disturbing wave.
Promptly, the size that RSSI forward position when interference wave judging portion imports the forward position threshold value of forward position threshold setting portion input with reception wave impulse string changes compares, the RSSI forward position is changed the reception ripple that is in more than the threshold value of forward position be judged to be useful wave (to call the D ripple in the following text), on the other hand, the RSSI forward position is changed the reception ripple that is in below the threshold value of forward position and be judged to be disturbing wave (U ripple).Therefore, if will be used to judge that the forward position threshold setting of U ripple is and the corresponding optimum value of system then to obtain being suitable for the good sensitivity of system.
(4) in the diversity receiver of above-mentioned (2) or (3) record, and then also have the timing correction portion of the supervision variable-width that makes above-mentioned reception electric field level, above-mentioned timing correction portion makes this forward position monitor narrowed width once subnormal after receiving the received pulse string.
The diversity receiver of above-mentioned (2) or (3) record just is judged to be useful wave (D ripple) when detecting the forward position in the variation supervision width that is receiving electric field level (RSSI), just be judged to be the U ripple when not detecting the forward position in above-mentioned supervision width.Owing to know correct time of reception event the variation of (RSSI) is not monitored that width setup gets wideer when usually, receiving the action beginning.On the other hand, general U ripple can take place at any time.Therefore, even if the U ripple when detecting the forward position in the variation supervision width of RSSI, also can be mistaken for the D ripple.For this reason, in case know the pulse train input time (after promptly once correctly receiving pulse train) of D ripple, monitor that by the variation that makes RSSI narrowed width just can reduce the probability that flase drop goes out.
(5) in the diversity receiver of above-mentioned (2) record, above-mentioned timing correction portion is that benchmark is obtained the position of received pulse string next time with the position of last received pulse string, and the correction forward position supervision width that slides is put so that comprise above-mentioned received pulse displacement next time.
Usually, when the distance of opposed radio station changed, the input time of pulse train also changed.Therefore, revise forward position supervision width, can correctly detect the U ripple by not only sliding by the timing correction portion the normal time of reception in the initial normal time of reception but also each time.
(6) in the diversity receiver of above-mentioned (4) record, above-mentioned timing correction portion at the state continuance that can not receive during official hour, then make above-mentioned forward position monitor that width broadens.
When the signal that can not receive opposed radio station has continued a period of time, just do not know the correct time of reception, the forward position that also just can not carry out the RSSI on the tram monitors.Therefore, by by above-mentioned timing correction portion at the state continuance that can not receive make during official hour above-mentioned forward position monitor that width broadens, just can detect the position, forward position of RSSI, the Looking Out Time of modified R SI.For this reason, even under the situation that accepting state worsens, also can reduce its harmful effect to U ripple detection function.
(7) in the diversity receiver of above-mentioned (1) record, above-mentioned interference wave judging portion monitors the variation of the reception electric field level that receives ripple at ordinary times, variation when above-mentioned reception electric field level when monitoring just is judged to be disturbing wave when a certain variation is above, limit above-mentioned diversity processing section and import this reception ripple.
Therefore, owing to can detect the U ripple that in the way of received pulse string, takes place constantly, can reduce of the harmful effect of U ripple to receiving.
(8) in the diversity receiver of above-mentioned (1) record, above-mentioned interference wave judging portion monitors above-mentioned reception electric field level in the end position of the received pulse string sequential that receives ripple.
End position by monitoring received pulse string sequential (promptly, the back edge moment of pulse train) variation of RSSI, can not be detected even for example when the forward position of received pulse string, determine the reception ripple of U ripple, so can reduce of the harmful effect of U ripple receiving as the U ripple yet.
(9) in the diversity receiver of above-mentioned (1) record, and then have the given data information that is used to store known reception electric field level data portion is provided, the reception electric field level change of the known reception electric field level data that above-mentioned interference wave judging portion will read from the above-mentioned given data information portion of providing and the reception electric field level change that receives ripple compare, when change of the electric field level of above-mentioned reception ripple and known reception electric field level change obviously when different, judge that then this reception ripple is a disturbing wave.
Because with the change of known RSSI data is the change that the basis monitors RSSI, can more correctly detect the U ripple so compare with the supervision of above-mentioned RSSI.
(10) in above-mentioned (1) to the diversity receiver of (9) each record, and then have input invalid reception wave number configuration part, be used to set the number that can make simultaneously to the invalid reception ripple of the input of above-mentioned diversity processing section.
Owing to can set the number that makes simultaneously the invalid reception ripple of the input of above-mentioned diversity processing section by importing invalid reception wave number configuration part, even, handle to carry out diversity so when the antenna number that has received the U ripple is a lot of, also can import the reception ripple of some to diversity processing section.Therefore, can not make the reception data interruption.
Description of drawings
The block diagram of the structure of the diversity receiver of Fig. 1, explanation the 1st execution mode of the present invention.
The figure of the action of the diversity receiver of Fig. 2, explanation the 1st execution mode of the present invention.
The block diagram of the structure of the diversity receiver of Fig. 3, explanation the 2nd execution mode of the present invention.
The block diagram of the structure of the diversity receiver of Fig. 4, explanation the 3rd, the 4th, the 5th execution mode of the present invention.
The figure of the work of the diversity receiver of Fig. 5, explanation the 3rd execution mode of the present invention.
The figure of the work of the diversity receiver of Fig. 6, explanation the 4th execution mode of the present invention.
The block diagram of the structure of the diversity receiver of Fig. 7, explanation the 6th execution mode of the present invention.
The figure of the work of the diversity receiver of Fig. 8, explanation the 6th execution mode of the present invention.
The block diagram of the structure of the diversity receiver of Fig. 9, explanation the 7th execution mode of the present invention.
The block diagram of the structure of the diversity receiver of Figure 10, explanation the 8th execution mode of the present invention.
The figure of the work of the diversity receiver of Figure 11, explanation the 8th execution mode of the present invention.
The block diagram of the structure of the diversity receiver of Figure 12, explanation the 9th execution mode of the present invention.
The block diagram of the structure of Figure 13, the existing diversity receiver of explanation.
1,2 ... the N...... branch road
11,12 ... the 1N...... antenna
21,22 ... the 2N...... detection section
31,32 ... the 3N......A/D converter section
41,42 ... the 4N...... calculating part
51,52 ... the 5N...... detection unit
100...... diversity processing section
200...... reception data processing division
300...... time instruction unit
Embodiment
Below, the execution mode of a preferred embodiment of the present invention is described.
The 1st execution mode:
Use Fig. 1 that the structure of the diversity receiver of present embodiment is described.The component part the same with existing diversity receiver composed with identical symbol and omitted its explanation.
As shown in Figure 1, each branch road 1,2 ... the formation of N comprises: receive electric wave a plurality of antennas 11,12 ... 1N; With each antenna 11,12 ... the 1N correspondence to receive ripple carry out detection and measure simultaneously the reception electric field level (to call RSSI in the following text) of this reception ripple a plurality of detection sections 21,22 ... 2N; To respectively from detection section 21,22 ... the RSSI information that 2N comes carry out the A/D conversion A/ D transformation component 31,32 ... 3N; A/D conversion RSSI information process by the aftermentioned method and with its process data send into following interference wave judging portion 51,52 ... the calculating part 41,42 of 5N ... 4N; According to calculating part 41,42 ... the process data that 4N comes judge the interference wave judging portion (to call detection unit in the following text) 51,52 that whether ripple is disturbing wave (U ripple) of receiving ... 5N.
And then, by each branch road 1,2 ... the detection section 21,22 of N ... the demodulating information and the RSSI information of the reception ripple that 2N obtains are sent into diversity processing section 100, simultaneously, the such weighted information of aftermentioned from each branch road 1,2 ... the detection unit 51,52 of N ... 5N sends into diversity processing section 100.Diversity processing section 100 carries out the diversity processing of demodulating information according to RSSI information and weighted information.This diversity processing section demodulating information send into and receive data processing division 200, receive information treatment part 200 receives data according to above-mentioned demodulating data processing.
Below, use Fig. 1 and Fig. 2 that the work of the diversity receiver of present embodiment is described.
As shown in Figure 1, by a plurality of antennas 11,12 ... the electric wave that 1N receives send into respectively the detection section corresponding 21,22 with antenna ... 2N, detection section 21,22 ... detection among the 2N, measure RSSI information simultaneously.And, detection section 21,22 ... the demodulating information that detection goes out among the 2N exports diversity processing section 100 to, detection section 21,22 ... the RSSI information of measuring among the 2N export to A/ ID converter section 31,32 ... 3N.
In view of the above, A/ D converter section 31,32 ... 3N to indication constantly A and B RSSI information separately carry out the A/D conversion, with the RSSI level after the two A/D conversions constantly export to calculating part 41,42 ... 4N.Calculating part 41,42 ... result's (process data) that 4N will deduct the variable quantity of the RSSI that the level of the RSSI of A constantly obtains as shown in Figure 2 from the RSSI level of moment B export to detection unit 51,52 ... 5N.The forward position threshold value that to judge usefulness in advance input to detection unit 51,52 ... 5N, detection unit 51,52 ... 5N is judged to be useful wave (D ripple) during greater than the forward position threshold value at the variable quantity (forward position) of its RSSI, when the variable quantity of its RSSI is judged to be disturbing wave (U ripple) during less than the forward position threshold value.
Detection unit 51,52 ... 5N is to diversity processing section 100 output weighted informations.This weighted information is exactly the weighted information that is attached to when diversity processing section 100 carries out the diversity processing on the demodulating information, in the present embodiment, it is invalid that the reception ripple demodulating information that is judged to be the branch road of U ripple is considered as, when being judged to be the D ripple, on the demodulating information of this D ripple, add the weight that is in proportion with its RSSI.For example, detection unit 51,52 ... the RSSI information that 5N will be judged to be the branch road of U ripple is enclosed the weighted information of " 0 " and to diversity processing section 100 outputs etc.
In diversity processing section 100, be weighted processing, with each branch road 1,2 ... the RSSI of N output be in proportion to each branch road 1,2 ... the detection section 21,22 of N ... the demodulating information weighting of 2N, obtain demodulating data.This weighted demodulating data input receive data processing division 200, receive the processing of data at this.
Therefore, if diversity receiver according to present embodiment, even because of reason RSSI such as decline change, the RSSI of several branch roads descends or several branch road has entered the U ripple, each branch road 1,2 ... the detection unit 51,52 of N ... 5N can detect the U ripple, therefore thereby it is invalid that the input that will be judged to be the reception ripple of U ripple in diversity processing section 100 is considered as, and can prevent the mistake of the reception data that cause because of the U ripple.Thereby, can prevent because of disturbing wave make receiving sensitivity and descend, alleviate disturbing wave harmful effect, guarantee good reception sensitivity.For this reason, can carry out stable reception data processing.
The 2nd execution mode
Fig. 3 illustrates the structure of the diversity receiver of present embodiment.The component part the same with the diversity receiver of existing and the 1st execution mode composed with identical symbol and omitted its explanation.
In the 1st execution mode, in advance threshold value has been defeated by detection unit 51,52 ... 5N, but in the present embodiment, as shown in Figure 3, set up forward position threshold setting portion 60, by the detection unit 51,52 of these 60 pairs of each branch roads of forward position threshold setting portion ... 5N sets the forward position threshold value.As this forward position threshold value, for example input " if having the above RSSI forward position variation of how many dB then to be judged to be the forward position " etc. detects condition.
If according to present embodiment, can will be used to judge that the forward position threshold setting of U ripple becomes the optimum value that adapts with system by forward position threshold setting portion 60, therefore, can obtain the good receiving sensitivity that adapts with system.
The 3rd execution mode
Use Fig. 4 and Fig. 5 that the structure and the action of the diversity receiver of present embodiment are described.The component part the same with diversity receiver existing, the 1st and the 2nd execution mode composed with identical symbol and omitted its explanation.
The time instruction unit 300 of the diversity receiver of the 1st execution mode is to set 2 moment A and B (Fig. 2) with certain interval, but, the diversity receiver of present embodiment also has the timing correction portion 250 of the supervision width that changes RSSI, this timing correction portion 250 obtains receiving time information from Return Reception Dept. shown in Figure 3 200, export the correction value of Looking Out Times in case of necessity to time instruction unit 300, one subnormal receive the received pulse string after, just this forward position is monitored width, is Looking Out Time A1 shown in Figure 5, B1 is compressed into Looking Out Time A2, B2.
Usually, owing to when receiving the action beginning, do not know correct time of reception, so the variation of RSSI is monitored width (Looking Out Time A1 shown in Figure 5, B1) set widelyer, but, because the U ripple can take place at any time, so, although when detecting the forward position in the variation supervision width at RSSI, be that the U ripple also may be mistaken for the D ripple.
If diversity receiver according to present embodiment, in case the pulse train of knowing the D ripple is after input time (that is, once correctly behind the received pulse string), monitors that by the variation of compression RSSI width makes it to become Looking Out Time A2, B2 just can reduce the probability that flase drop goes out.Therefore, can prevent the decline of receiving sensitivity.
The 4th execution mode
Use Fig. 4 and Fig. 6 that the structure and the action of the diversity receiver of present embodiment are described.The component part the same with diversity receiver existing, the 1st to the 3rd execution mode composed with identical symbol and omitted its explanation.
Because also change the input time of pulse train when the distance of opposed radio station changes, so in the present embodiment, timing correction portion 250 and then not only slide when initial normal reception but also when each normal the reception and revise the forward position and monitor width is exported to time instruction unit 300 to the Looking Out Time that this slip has been revised.Therefore, even pulse train variation input time also can correctly detect the U ripple.
That is, as shown in Figure 6, according to the time of reception that in RSSI input time 1, has normally received signal (Looking Out Time A1, B1) slide be adapted to next RSSI input time 2 (following subpulse Looking Out Time A2, B2).
For example, in the such TDMA-TDD of PHS (carrying out receiving and transmitting signal) system, with the detecting of frame time of carrying out the received pulse string for the basis that detect of specific characteristic row (to call UW in the following text, UW is a tagged word) with time division way.Therefore, under the situation of TDMA-TDD system, can detect the position with the UW in the previous received pulse string is the time of reception position that benchmark decides the next pulse string.
In addition, as above-mentioned slip modification method, for example can be with slip Looking Out Time before and after the clock-unit that stipulates in the radio station.Have again, the rapid variation of time of reception is seldom arranged usually, so also can set the permissible range of sliding and revising.
The 5th execution mode
Use Fig. 4 that the structure and the action of the diversity receiver of present embodiment are described.The component part the same with diversity receiver existing, the 1st to the 3rd execution mode composed with identical symbol and omitted its explanation.
When opposed radio station continue to be in temporarily can not received signal state the time, then can not know correct time of reception, the forward position that can not carry out the RSSI on the tram monitors.
Therefore, in the present embodiment, the state continuance that does not have a Correction and Control when 250 pairs of time instruction units 300 of timing correction portion is sometime the time, and 250 broadening forward positions of timing correction portion monitor width.Therefore, can detect the forward position of RSSI, Looking Out Time that can modified R SI.Thereby, even accepting state worsens the influence that also can reduce U ripple detection function.
The 6th execution mode
Use Fig. 7 and Fig. 8 that the structure and the action of the diversity receiver of present embodiment are described.The component part the same with diversity receiver existing, the 1st to the 3rd execution mode composed with identical symbol and omitted its explanation.
The diversity receiver of above-mentioned the 1st to the 5th execution mode monitors the front position of received pulse string, thereby can not detect the U ripple that takes place constantly in the middle of the received pulse string.
Therefore, in the diversity receiver of present embodiment, as shown in Figure 8 in the pulse train receiving course, calculating part 41,42 ... 4N constantly calculates the variable quantity of RSSI, with the variable quantity of this RSSI export to detection unit 51,52 ... 5N.For example, as shown in Figure 8, monitoring A constantly, B, C, the D place detects the RSSI level, obtains the variable quantity ((the RSSI level of one moment of the RSSI level A of B constantly) of the RSSI of each Looking Out Time, (the RSSI level of RSSI level-moment B of C constantly), (the RSSI level of RSSI level-moment C of D constantly)).On the other hand, change level threshold configuration part 70 detection unit 51,52 ... setting threshold among the 5N, detection unit 51,52 ... 5N compares the RSSI variable quantity of input and this threshold value and takes a decision as to whether the U ripple.That is,, on the other hand, when less than threshold value, be judged to be the D ripple and enclose weighted information to demodulating information when the RSSI variable quantity of input is judged to be the U ripple during greater than threshold value and the demodulating information of this branch road is considered as invalid.
In the present embodiment, above-mentioned change level threshold configuration part 70 be to each branch road detection unit 51,52 ... the U ripple that 5N will be for example " just being considered as the U ripple if there is the above RSSI of how many dB to change " detects the corresponding device of setting neatly with system of condition.
Therefore, owing to can detect the U ripple that in the middle of the received pulse string, takes place constantly, can reduce of the harmful effect of U ripple to receiving.
The 7th execution mode
Use Fig. 9 that the structure and the work of the diversity receiver of present embodiment are described.The component part the same with diversity receiver existing, the 1st to the 3rd execution mode composed with identical symbol and omitted its explanation.
In the 2nd execution mode, as shown in Figure 3, by the detection unit 51,52 of 60 pairs of each branch roads of forward position threshold setting portion ... 5N sets the forward position threshold value, but in the diversity receiver of present embodiment, by the back along the detection unit 51,52 of 80 pairs of each branch roads of threshold setting portion ... 5N sets the back along threshold value.As this back along threshold value, input for example " have behind the above RSSI of how many dB along change just be judged to be the back along " etc. the condition that detects.
In addition, under the situation of present embodiment, set up the Looking Out Time of two points as shown in Figure 2 to monitor the variation of RSSI in the end position (being the back of pulse train) of received pulse string sequential along constantly.
Therefore,, detect owing to can be used as the U ripple even do not determine the reception ripple of U ripple constantly in the forward position of received pulse string, so, can reduce of the harmful effect of U ripple from next received pulse start of string to receiving.
The 8th execution mode
Use Figure 10 and Figure 11 that the structure and the work of the diversity receiver of present embodiment are described.To with existing, the the 1st to the 3rd, the 6th and the same component part of the diversity receiver of the 7th execution mode compose with identical symbol and omit its explanation.
The given data information that the diversity receiver of present embodiment is provided with the known reception electric field level data of storage as shown in figure 10 provides portion 90, given data information provide the detection unit 51,52 of portion 90 to each branch road ... the RSSI data that 5N output is known.Detection unit 51,52 ... 5N comes the change of the known RSSI data (known RSSI) imported more in view of the above and receives the RSSI change of ripple.
Usually, there is known part in the content of RSSI data (for example, UW).And, the corresponding relative variability (for example, the variation of 1 bit base of transfer rate, envelope change) that can also detect RSSI with these data.
At this, if the change of the RSSI of the reception ripple that has received for known portions reality and the change of known RSSI data are much the same, the detection unit 51,52 of present embodiment ... it is correct reception ripple (being the D ripple) that 5N judges, on the other hand, obvious when different in the relative variation of the change of the ripple of the change RSSI that receives to(for) known portions and known RSSI data, judge that then this reception ripple is a disturbing wave.
Also have, owing to do not know the absolute value of RSSI, so, as shown in figure 11, the diversity receiver of present embodiment is measured the RSSI that receives ripple subtly, for example, according to the RSSI variable quantity of per 1 bit (current RSSI is with respect to the increment of the RSSI before 1 bit) thus it is D ripple or U ripple that the RSSI data known with it compare judgement.。In addition, also can set permissible range, will be judged to be the U ripple above the reception ripple of this permissible range to the change of the RSSI of each bit.
The 9th execution mode
Use Figure 12 that the structure and the work of the diversity receiver of present embodiment are described.To with existing, the 1st to the 3rd component part the same with the diversity receiver of the 6th to the 8th execution mode composed with identical symbol and omit its explanation.
The diversity receiver of present embodiment also is provided with the invalid reception ripple number of input configuration part, is used to set to make the number of simultaneously diversity processing section 100 being imported invalid reception ripple.This imports the maximum U ripple branch road number configuration part 150 among invalid reception ripple number actual Figure 12 of being in configuration part, and maximum U ripple branch road number configuration part 150 can make the setting number (to call " number is set in allowing of U ripple branch road " in the following text) of allowing of importing the invalid branch road number of this demodulating information simultaneously be input to diversity processing section 100 in the branch road that has detected the U ripple.Have, above-mentioned " number is set in allowing of U ripple branch road " preferably is chosen to and a corresponding optimum value of way or system again.
In view of the above, even under the many situations of a way that has received the U ripple, diversity processing section 100 also can be imported the demodulating information of certain reception ripple.Therefore, can carry out diversity handle, to receiving data processing division 200 demodulated output datas, thereby do not receive the worry that data are interrupted.
In addition, thus when judging that a certain branch road new U ripple occurs and surpassed " number is set in allowing of U ripple branch road ", handle also as the D ripple and be fine even will in the branch road of every U ripple so far, be judged to be the reception ripple of the branch road of U ripple at first.Therefore, do not have receiving sensitivity and descend, receive interrupted situation generation.
As mentioned above, according to diversity receiver of the present invention, it receives whether ripple is disturbing wave (U ripple) to each antenna detection by determining interference portion, and then make the input of the reception wave direction diversity processing section branch that is judged to be the U ripple invalid, therefore, even when several antennas have received the U ripple, also can prevent the mistake of the reception data that cause because of the U ripple.Thereby, can prevent the decline of the receiving sensitivity that causes because of disturbing wave, the harmful effect that alleviates disturbing wave.
And then, the size that RSSI forward position when the interference wave detection unit will be imported with the pulse train that receives ripple by the forward position threshold value of forward position threshold setting portion input changes compares, judgement is D ripple or U ripple, so, if will be used to judge that the forward position threshold setting of U ripple becomes the optimum value that adapts with system, then can obtain the good receiving sensitivity that adapts with system.
In addition, because the timing correction portion is monitoring narrowed width once subnormal this forward position that makes after having received the received pulse string, thus can monitor in the width in the variation of RSSI and detect the forward position of U ripple, thus the probability that the flase drop of D ripple goes out can be reduced.
And then, when opposed radio station continue to be in temporarily can not received signal state the time, then can not know correct time of reception, the forward position that can not carry out the RSSI on the tram monitors.Therefore, when the state continuance official hour that can not receive, timing correction portion then broadening forward position monitors width.Therefore, can detect the position, forward position of RSSI, Looking Out Time that can modified R SI.Thereby, even accepting state worsens the harmful effect that also can reduce U ripple detection function.
Also have, interference wave judging portion monitors the variation of the RSSI that receives ripple at ordinary times, and the variation as RSSI when this supervision just is judged to be disturbing wave when a certain variation is above, and it is invalid to make diversity processing section import this reception ripple.Therefore, the U ripple that in the way of received pulse string, takes place constantly can be detected, thereby of the harmful effect of U ripple can be reduced receiving.
And then, interference wave judging portion in the end position of the received pulse string sequential that receives ripple (promptly, the back edge of pulse train is constantly) supervision RSSI, can not be detected even for example when the forward position of received pulse, determine the reception ripple of U ripple, so can reduce of the harmful effect of U ripple receiving as the U ripple yet.
In addition, the RSSI change of the known RSSI data that interference wave judging portion will read from the above-mentioned given data information portion of providing and the RSSI change that receives ripple compare, when the RSSI change that receives ripple and known RSSI change when different, judge that then this reception ripple is a disturbing wave, so, compare with the supervision of above-mentioned RSSI, can more correctly detect the U ripple.
Also have, owing to can set the number that makes simultaneously the invalid reception ripple of the input of above-mentioned diversity processing section by importing invalid reception wave number configuration part, even, carry out diversity and handle so also can import certain reception ripple for a long time to diversity processing section in the antenna number that has received the U ripple.Therefore, can not make the reception data interruption.
Claims (9)
1. diversity receiver, it is characterized in that, have a plurality of antennas that receive electric wave, be connected with each antenna respectively, in order to measure from a plurality of reception electric field level determination parts of the reception electric field level of the next reception ripple of described antenna, carry out the diversity processing section that diversity is handled according to reception ripple that comes from described a plurality of antennas and described reception electric field level, with interference wave judging portion, this interference wave judging portion is corresponding with each antenna and establish, poor according to the reception electric field level before and after the received pulse string forward position of obtaining by the output of described reception electric field level determination part, judge it receives in the ripple whether disturbing wave is arranged, simultaneously, restriction has been judged to be the reception ripple of disturbing wave to described diversity processing section input.
2. the diversity receiver of claim 1 record, it is characterized in that, also has forward position threshold setting portion, be used to set the threshold value that receives the electric field level difference before and after the forward position of the reception electric field level when receiving ripple received pulse string, the threshold determination of the reception electric field level difference that described interference wave judging portion also comes according to described forward position threshold setting portion receives whether ripple is disturbing wave.
3. the diversity receiver of claim 1 record, it is characterized in that, also have in order to obtain the timing correction portion that forward position that the official post of described reception electric field level detects the time interval between the timing as the reception electric field level before and after the received pulse string forward position monitors variable-magnitude, described timing correction portion makes this forward position monitor narrowed width once subnormal after receiving the received pulse string.
4. the diversity receiver of claim 1 record, it is characterized in that, the position of the above received pulse string of described timing correction portion is the position that benchmark is obtained next received pulse string, slides and revises forward position supervision width, puts so that comprise described Next received pulse displacement.
5. the diversity receiver of claim 3 record is characterized in that, described timing correction portion at the state continuance that can not receive make described forward position monitor that width broadens during official hour.
6. the diversity receiver of claim 1 record, it is characterized in that, also has change level threshold configuration part, described interference wave judging portion from the forward position of received pulse string to the back along reception electric field level variation be that certain variation of being set by described change level threshold configuration part is when above, just be judged to be disturbing wave, restriction is imported this reception ripple to described diversity processing section.
7. the diversity receiver of claim 1 record, it is characterized in that, has the back along threshold setting portion, described interference wave judging portion behind the received pulse string of obtaining is being under the situation below certain variation of being set along threshold setting portion by described back along the reception electric field level difference of front and back, be judged to be disturbing wave, described diversity receiver handling part restriction be judged to be the input of the reception ripple of disturbing wave.
8. the diversity receiver of claim 1 record, it is characterized in that, and then the given data information with the known reception electric field level data of storage provides portion, the time fluctuation of the known reception electric field level data that described interference wave judging portion will read from the described given data information portion of providing and the time fluctuation that receives the reception electric field level of ripple compare, when it is different, judge that then this reception ripple is a disturbing wave.
9. the diversity receiver of each record of claim 1 to 8 is characterized in that, and then has import-restriction and receive the wave number configuration part, and setting can limit simultaneously the quantity to the reception ripple of the input of described diversity processing section.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15195696A JP3319689B2 (en) | 1996-06-13 | 1996-06-13 | Diversity receiver |
| JP151956/96 | 1996-06-13 | ||
| JP151956/1996 | 1996-06-13 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1168582A CN1168582A (en) | 1997-12-24 |
| CN1153396C true CN1153396C (en) | 2004-06-09 |
Family
ID=15529891
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB961231319A Expired - Fee Related CN1153396C (en) | 1996-06-13 | 1996-12-18 | Diversity receiver |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3319689B2 (en) |
| CN (1) | CN1153396C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6141567A (en) * | 1999-06-07 | 2000-10-31 | Arraycomm, Inc. | Apparatus and method for beamforming in a changing-interference environment |
| JP4667118B2 (en) * | 2005-05-17 | 2011-04-06 | 株式会社エヌ・ティ・ティ・ドコモ | Diversity receiver and control method for diversity reception operation |
| JP4286817B2 (en) * | 2005-08-05 | 2009-07-01 | 株式会社日立国際電気 | Wireless communication system and wireless communication method |
-
1996
- 1996-06-13 JP JP15195696A patent/JP3319689B2/en not_active Expired - Fee Related
- 1996-12-18 CN CNB961231319A patent/CN1153396C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JP3319689B2 (en) | 2002-09-03 |
| CN1168582A (en) | 1997-12-24 |
| JPH09331310A (en) | 1997-12-22 |
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