CN100463388C - Transmitting device and transmitting method - Google Patents
Transmitting device and transmitting method Download PDFInfo
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- CN100463388C CN100463388C CNB2003801005197A CN200380100519A CN100463388C CN 100463388 C CN100463388 C CN 100463388C CN B2003801005197 A CNB2003801005197 A CN B2003801005197A CN 200380100519 A CN200380100519 A CN 200380100519A CN 100463388 C CN100463388 C CN 100463388C
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Abstract
A turbo encoding section 102 turbo-encodes transmission data, outputs systematic bit data to a first modulation section 103a and outputs parity bit data to a second modulation section 104. The first modulation section 103a always QPSK-modulates systematic bit data. The second modulation section 103b adaptively modulates parity bit data. The control section 101 outputs a control signal for carrying out 16 QAM modulation to the second modulation section 103b when the RSSI value is equal to or higher than a threshold and outputs a control signal for carrying out QPSK modulation to the second modulation section 103b when the RSSI signal value is less than the threshold. In this way, it is possible to further make the error rate characteristic compatible with the transmission efficiency.
Description
Technical field
The present invention relates to a kind of dispensing device and sending method, especially a kind of dispensing device and sending method that is used to send the transmission data that adopt the turbo encoder coding.
Background technology
Traditionally, the spy broadcasts the standardization that coding can be used for the error correction coding mode and is used for 3GPP.Compare with other error correcting system, this spy broadcasts sign indicating number and is characterised in that and can accesses very high-quality error rate characteristic.
Fig. 1 represents a kind of example that adopts traditional spy to broadcast the dispensing device of sign indicating number.Dispensing device 10 shown in Fig. 1 comprises turbo encoding section 11, and is parallel/serial (hereinafter referred to as " P/S ") converter section 12, spread spectrum portion 13, wireless transmission part 14 and antenna 15.
13 pairs of modulation signals from P/S converter section 12 of spread spectrum portion carry out spread processing, generate spread-spectrum signal and give wireless transmission part 14 with spread-spectrum signal.Here, according to 3GPP (Third GenerationPartnersShip Project, the 3G (Third Generation) Moblie project organization) standardized way, the system bits data of 13 pairs of modulation signals of spread spectrum portion adopt identical spreading code with the parity check bit data, use the spreading code quantity of identical spread spectrum rate and distribution also identical.Wireless transmission part 14 is from spread spectrum portion 13 receiving spread frequency signals, and sends these signals by antenna 15.
Here, traditional CDMA dispensing device should have a kind of parts, is used for distributing in a subscriber signal a plurality of spread-spectrum signals to come it is carried out spread spectrum, to improve error rate characteristic.
In addition, traditional CDMA dispensing device also has: data optional feature, the Input Data word symbol string that will have a variable bit are converted to the data character string XA that bit number has pre-determined; The 1st addressable part, data strings XA encodes; The 2nd addressable part is encoded to the data character string XA ' after interweaving; And 2 deleted and cut parts, to the described the 1st and the output of the 2nd addressable part delete and cut.
Yet there are the following problems for traditional CDMA dispensing device: be that a subscriber signal distributes a plurality of spread-spectrum signals when improving error rate characteristic when spread spectrum, the subscriber signal number that can be re-used reduces, thereby frequency utilization efficient is reduced; And when the spread spectrum rate improved, error rate characteristic can improve, but transmitting efficiency has reduced.That is to say that traditional CDMA dispensing device exists and is difficult to take into account the problem of improving error rate characteristic and improving transmitting efficiency.
Summary of the invention
The purpose of this invention is to provide a kind of more can taking into account and make error rate characteristic and transmitting efficiency more compatible dispensing device and sending method mutually.
This purpose just will be carried out Adaptive Modulation independently of each other to system bits data and parity check bit data.That is to say that this purpose can realize by the following method: when channel quality degrades, by the system bits data being converted to the decline that the less modulation system of many-valued number prevents error rate characteristic; And when wrong the generation, retransmit number of times according to carrying out error correction than the more modulation system of the many-valued number of system bits data with the parity check bit that sends, reduce the re-transmission that sends data.
In addition, this purpose reaches by the following method: adopting special broadcasting in the CDMA dispensing device of sign indicating number as error correcting code, with only distributing a plurality of spreading codes to carry out spread spectrum to system bits.
The invention provides a kind of dispensing device, comprising: addressable part, carry out the spy to the transmission data and broadcast coding and output system bit data and parity check bit data; Control assembly, at communication quality is that first value is when above, second modulation system that first modulation system of the many-valued number of modulation described system bits data of setting when being lower than described first value at communication quality is also Duoed, be set at the modulation system of described system bits data, and at communication quality is that second value lower than first value is when above, with described second modulation system that described first modulation system of the many-valued number of modulation described parity check bit data of setting when being lower than described second value at communication quality is also Duoed, be set at the modulation system of described parity check bit data; Modulating part with described first modulation system or described second modulation system that described control assembly is set, is modulated independently of each other to described system bits data and described parity check bit data; And transmit block, send the described system bits data and the described parity check bit data of modulating through described modulating part.
The invention provides a kind of base station apparatus that has dispensing device, described dispensing device comprises: addressable part, carry out the spy to the transmission data and broadcast coding and output system bit data and parity check bit data; Control assembly, at communication quality is that first value is when above, second modulation system that first modulation system of the many-valued number of modulation described system bits data of setting when being lower than described first value at communication quality is also Duoed, be set at the modulation system of described system bits data, and at communication quality is that second value lower than first value is when above, with described second modulation system that described first modulation system of the many-valued number of modulation described parity check bit data of setting when being lower than described second value at communication quality is also Duoed, be set at the modulation system of described parity check bit data; Modulating part with described first modulation system or described second modulation system that described control assembly is set, is modulated independently of each other to described system bits data and described parity check bit data; And transmit block, send the described system bits data and the described parity check bit data of modulating through described modulating part.
The invention provides a kind of communication terminal that has dispensing device, described dispensing device comprises: addressable part, carry out the spy to the transmission data and broadcast coding and output system bit data and parity check bit data; Control assembly, at communication quality is that first value is when above, second modulation system that first modulation system of the many-valued number of modulation described system bits data of setting when being lower than described first value at communication quality is also Duoed, be set at the modulation system of described system bits data, and at communication quality is that second value lower than first value is when above, with described second modulation system that described first modulation system of the many-valued number of modulation described parity check bit data of setting when being lower than described second value at communication quality is also Duoed, be set at the modulation system of described parity check bit data; Modulating part with described first modulation system or described second modulation system that described control assembly is set, is modulated independently of each other to described system bits data and described parity check bit data; And transmit block, send described system bits data and described parity check bit data through described modulating part modulation.
The invention provides a kind of sending method, comprising: the transmission data are carried out the spy broadcast coding and the step of output system bit data and parity check bit data; At communication quality is that first value is when above, second modulation system that first modulation system of the many-valued number of modulation described system bits data of setting when being lower than described first value at communication quality is also Duoed, be set at the modulation system of described system bits data, and at communication quality is that second value lower than first value is when above, with described second modulation system that described first modulation system of the many-valued number of modulation described parity check bit data of setting when being lower than described second value at communication quality is also Duoed, be set at the step of the modulation system of described parity check bit data; With described first modulation system or described second modulation system of setting, the step that described system bits data and described parity check bit data are modulated independently of each other; And the described system bits data after the transmission modulation and the step of described parity check bit data.
Description of drawings
Fig. 1 is the block diagram of the traditional dispensing device structure of expression;
Fig. 2 is the block diagram of expression according to the dispensing device structure of embodiment of the present invention 1;
Fig. 3 is the block diagram of expression according to the addressable part structure of embodiment of the present invention 1;
Fig. 4 is the flow chart of expression according to the dispensing device operation of embodiment of the present invention 1;
Fig. 5 is the block diagram of expression according to the dispensing device structure of embodiment of the present invention 2;
Fig. 6 is the block diagram of expression according to the control assembly structure of embodiment of the present invention 2;
Fig. 7 is the flow chart of expression according to the dispensing device operation of embodiment of the present invention 2;
Fig. 8 is the block diagram according to the dispensing device structure of embodiment of the present invention 3;
Fig. 9 is the block diagram of expression according to the dispensing device structure of embodiment of the present invention 4;
Figure 10 is the block diagram of expression according to the dispensing device structure of embodiment of the present invention 5;
Figure 11 is the block diagram of expression according to the dispensing device structure of embodiment of the present invention 6; And
Figure 12 is the schematic diagram of expression according to the operation of the dispensing device of embodiment of the present invention 6.
Embodiment
With reference to the accompanying drawings embodiments of the present invention are elaborated below.
(execution mode 1)
Fig. 2 is the schematic diagram of expression according to dispensing device 100 structures of embodiment of the present invention 1.Here, execution mode 1 will describe the situation of using QPSK and these two kinds of modulation systems of 16QAM.In addition, according to execution mode 1, the more modulation system of many-valued number is 16QAM, and the less modulation system of many-valued number is QPSK.
For example, turbo encoding section 102 is turbo encoders, the part that input is sent data is not encoded and is outputed to the 1st modulation portion 103a as the system bits data, and remaining input is sent section data carry out recursive convolutional encoder, and it is outputed to the 2nd modulation portion 103b as the parity check bit data.Here, turbo encoding section 102 also can be any encoder except turbo encoder.The back will be elaborated to the details of turbo encoding section 102.
The modulation system of the 1st modulation portion 103a is fixed as QPSK, modulates carrying out QPSK from the system bits data of turbo encoding section 102 inputs, and the data of modulation are outputed to P/S converter section 105.
QPSK modulates the 2nd modulation portion 103b or the Adaptive Modulation of 16QAM modulation to carrying out from the parity check bit data of turbo encoding section 102 inputs based on the control signal from control part 101 inputs, and the data after will modulating output to P/S converter section 105.The back will describe the method that changes modulation system.
P/S converter section 105 will be converted to serial data from parallel data from the system bits data of the 1st modulation portion 103a input and the parity check bit data of importing from the 2nd modulation portion 103b, and serial data is outputed to spread spectrum portion 106.
Spreading code will be multiply by from the transmission data of S/P converter section 107 inputs in spread spectrum portion 106 as the spread spectrum parts, and multiplied result is outputed to S/P converter section 107.Here, when sending, multiply by the spreading code that the spread spectrum rate is not " 1 " according to the OFDM-CDMA communication mode; When sending, multiply by the spreading code of spread spectrum rate for " 1 " according to the ofdm communication mode.
S/P converter section 107 will be converted to parallel data from serial data from the transmission data of spread spectrum portion 106 inputs, and transformation result is outputed to contrary discrete Fourier transform (DFT) portion 108.
That contrary discrete Fourier transform (DFT) portion 108 is converted to the individual subcarrier with different frequency of N (N be natural number) arbitrarily with data and generate the transmission data, and the transmission data that will generate send from antenna 109.When sending according to the OFDM-CDMA communication mode, the signal multiplexing number of each subcarrier is other multiplexing number except " 1 ", and the sign indicating number multiplexing number of transmission signal also is other multiplexing number except " 1 "; When sending according to the ofdm communication mode, the signal multiplexing number of each subcarrier is that " 1 " and the sign indicating number multiplexing number that sends signal also are " 1 ".In addition, S/P converter section 107 and contrary discrete Fourier transform (DFT) portion 108 have constituted the OFDM parts.
Next, will be described in detail the structure of turbo encoding section 102 according to Fig. 3.Turbo encoding section 102 is mainly by the portion of interweaving 201, and convolutional encoding portion 202 and convolutional encoding portion 203 constitute.
The portion 201 that interweaves will interweave to sending data, and the data after will interweaving output to convolutional encoding portion 203.
202 pairs of parts that send data of convolutional encoding portion are carried out recursive convolution, and data are outputed to the 2nd modulation portion 103b.What convolutional encoding portion 202 exported is the parity check bit data.
203 pairs of parts from the transmission data of the portion's of interweaving 201 inputs of convolutional encoding portion are carried out recursive convolutional encoder, and data are outputed to the 2nd modulation portion 103b.From 203 outputs of convolutional encoding portion are parity check bit data.Here, be not encoded to the part of the transmission data of turbo encoding section 102 input, but former state output.Output here is the system bits data.
Next will describe the operation of dispensing device 100 according to Fig. 4.Send data and encoded by turbo encoding section 102 (step (hereinafter referred to as " ST ") 301), the system bits data are output to the 1st modulation portion 103a, and the parity check bit data are output to the 2nd modulation portion 103b.The system bits data that are input to the 1st modulation portion 103a are modulated with the QPSK mode, and are output to P/S converter section 105 (ST302).
On the other hand, when the RSSI signal was less than threshold value in ST303, it was that the control signal of QPSK outputs to the 2nd modulation portion 103b that control part 101 will be used for setting modulation system.The 2nd modulation portion 103b is set at QPSK (ST306) based on the control signal of the setting modulation system of importing from control part 101 with modulation system.To the parity check bit data that are input to the 2nd modulation portion 103b with carry out the QPSK mode modulate after with it, and be output to P/S converter section 105 (ST307).P/S converter section 105 is converted to serial data with system bits data and parity check bit data from parallel data, and will output to spread spectrum portion 106 (ST308) after the serial data.Then, spread spectrum portion 106 will send data and multiply by spreading code (ST309), and then carry out a kind of OFDM and handle---and S/P conversion process and contrary discrete Fourier transform (DFT) are handled, and then the result are exported (ST310) from antenna 109.
When channel quality degrades in such dispensing device, prevent system bits data error rate characteristic degradation by setting the less modulation system of many-valued number; If mistake still takes place, can carry out error correction according to the more modulation system of many-valued number than system bits data, retransmit number of times thereby reduce the re-transmission that sends data.
On the other hand, when channel quality is good, can be by being that the more modulation system of many-valued number is improved error rate characteristic with the system bits data setting; If mistake still takes place, can use according to still less, and the parity check bit that the modulation system that can not cause error rate characteristic to worsen sends carries out error correction than the many-valued number of system bits data, retransmit number of times thereby reduced the re-transmission that sends data.
Therefore, according to execution mode 1, system bits data and parity check bit data are modulated respectively independently of each other, and the modulation system of parity check bit data is according to communication quality and adaptively modifying, therefore can take into account the improvement that makes error rate characteristic and the raising of transmitting efficiency.In addition, the system bits data and the parity check bit data of separate modulation are carried out spread processing, are carried out then and impose OFDM, therefore can further improve the error rate characteristic that sends data.
Though be according to execution mode 1, have only the parity check bit data according to communication quality and Adaptive Modulation, it is according to communication quality and the situation of Adaptive Modulation that this execution mode also can be suitable for having only the data of system bits.
(execution mode 2)
Fig. 5 is the block diagram according to the dispensing device 400 of embodiment of the present invention 2.Here, present embodiment 2 will describe the situation of using QPSK and this modulation system of two types of 16QAM.In addition, in present embodiment 2, the more modulation system of many-valued number is 16QAM, and the less modulation system of many-valued number is QPSK.
On the other hand, when RSSI signal during less than threshold alpha, it is that the control signal of the less QPSK modulation system of many-valued number outputs to the 1st modulation portion 402a that control part 401 will be used to set modulation system; When RSSI signal during less than threshold value beta, it is that the control signal of the less QPSK modulation system of many-valued number outputs to the 2nd modulation portion 402b that control part 401 will be used to set modulation system.Here, be used continuing if the result of determination of communication well afoot and control part 401 demonstrates the modulation system of current use, control part 401 does not need to export any control signal to the 1st modulation portion 402a and the 2nd modulation portion 402b so.The back will be described in detail the configuration structure of control part 401.
Based on the control signal from control part 401 inputs, QPSK modulates the 1st modulation portion 402a or the 16QAM modulation to carrying out from the system bits data of turbo encoding section 102 inputs, and the data after will modulating output to P/S converter section 105.
Based on the control signal from control part 401 inputs, the 2nd modulation portion 402b carries out Adaptive Modulation such as QPSK modulation or 16QAM modulation to the parity check bit data of importing from turbo encoding section 102, and the data of modulation are outputed to P/S converter section 105.The back will describe the method that changes modulation system.
Next, will be described in detail the structure of control part 401 according to Fig. 6.Control part 401 mainly judges that by the 1st control part 501 and the 2nd judgement control part 502 are constituted.
When the RSSI signal was equal to or higher than predetermined threshold value α, the 1st judged that it is that the control signal of 16QAM outputs to the 1st modulation portion 402 that control part 501 will be used to set modulation system.On the other hand, when RSSI signal during less than threshold alpha, the 1st judges that it is that the control signal of QPSK outputs to the 1st modulation portion 402a that control part 501 will be used to set modulation system.
When the RSSI signal was equal to or higher than predetermined threshold value β, the 2nd judged that it is that the control signal of 16QAM outputs to the 1st modulation portion 402 that control part 502 will be used to set modulation system.On the other hand, when the RSSI signal less than threshold value beta, the 2nd judges that it is that the control signal of QPSK outputs to the 2nd modulation portion 402b that control part 502 will be used to set modulation system.
Owing to the system bits data require better communication quality than parity check bit data, threshold alpha is set at than threshold value beta have higher RSSI value.By this method, the system bits data always with modulating according to same modulation system, or to modulate according to the modulation system of lacking some than the many-valued number of the modulation system of parity check bit data slightly with the parity check bit data.
Next will describe the operation of dispensing device 400 according to Fig. 7.Send data and encoded (ST601) by turbo encoding section 102, the system bits data are output to the 1st modulation portion 402a, and the parity check bit data are output to the 2nd modulation portion 402b.
Based on the RSSI signal, control part 401 judges whether the RSSI signal is equal to or higher than threshold alpha (ST602), when the RSSI signal was equal to or higher than threshold alpha, control part 401 thought that communication quality is good, and will to be used to set modulation system be that the control signal of 16QAM outputs to the 1st modulation portion 402a.Based on the control signal that is used to set modulation system from control part 401 inputs, the 1st modulation portion 402a is set at 16QAM (ST603) with modulation system.The system bits data that are input to the 1st modulation portion 402a are modulated with the 16QAM mode, and are output to P/S converter section 105 (ST604).
On the other hand, in ST602, when RSSI signal less than threshold alpha the time, control part 401 outputs are used for modulation system is set at the control signal of QPSK.Based on the control signal that is used to set modulation system from control part 401 inputs, the 1st modulation portion 402a is set at QPSK (ST605) with modulation system.The system bits data that are input to the 2nd modulation portion 402b are modulated with the QPSK mode, and are output to P/S converter section 105 (ST606).
Then, based on the RSSI signal, control part 401 judges whether the RSSI signal is equal to or higher than threshold value beta (ST607), when the RSSI signal is equal to or higher than threshold value beta, control part 401 thinks that communication quality is good, and will to be used to set modulation system be that the control signal of 16QAM outputs to the 2nd modulation portion 402b.Based on the control signal that is used to set modulation system from control part 401 inputs, the 2nd modulation portion 402b is set at 16QAM (ST608) with modulation system.The parity check bit data that are input to the 2nd modulation portion 402b are modulated with the 16QAM mode, and are output to P/S converter section 105 (ST609).
On the other hand, in ST607, when RSSI signal during less than threshold value beta, it is that the control signal of QPSK outputs to the 2nd modulation portion 402b that control part 401 will be used to set modulation system.Based on the control signal that is used to set modulation system from control part 401 inputs, the 2nd modulation portion 402b is set at QPSK (ST610) with modulation system.The parity check bit data that are input to the 2nd modulation portion 402b are modulated with the QPSK mode, and are output to P/S converter section 105 (ST611).P/S converter section 105 is converted to serial with system bits data and parity check bit data from parallel, and will output to spread spectrum portion 106 (ST612) after the serial data.Then, spread spectrum portion 106 will send data and multiply by spreading code (ST613), further carry out a kind of OFDM again and handle---S/P conversion process, and carry out contrary discrete Fourier transform (DFT) and handle, and will send data and send (ST614) from antenna 109.
Therefore, according to execution mode 2, except the effect of execution mode 1 also according to communication quality adaptive modulation system bit data, thereby can further make the improvement of taking into account error rate characteristic and the raising of transmitting efficiency.In addition, according to execution mode 2, control part 401 takes different threshold values and RSSI signal to compare for system bits data and parity check bit data, thereby can make the improvement of taking into account error rate characteristic and the raising of transmitting efficiency by the variation of flexible responding communication quality.
Present embodiment 2 adopts different threshold alpha and β, judges with it whether communication quality is equal to or higher than the RSSI quality of signals, but also threshold alpha and threshold value beta can be set at identical value, perhaps threshold alpha is set at the value smaller slightly than threshold value beta.
(execution mode 3)
Fig. 8 is the block diagram of expression according to the structure of the dispensing device 700 of embodiment of the present invention 3.Adopted this modulation system of two types of QPSK and 16QAM in the execution mode 3, will the situation that adopt the less QPSK modulation system of many-valued number have been described here.In present embodiment 3, the more modulation system of many-valued number is 16QAM, and the less modulation system of as many as number is QPSK.
The 1st modulation portion 103a modulates the transmission data according to QPSK, and the data after will modulating output to P/S converter section 105.
The 2nd modulation portion 103b modulates the transmission data according to QPSK, and the data after will modulating output to P/S converter section 105.
Transmission data demand according to present embodiment has the excellent communications quality, as control information and re-transmission retransmission of information or the like.Yet, send data and be not limited only to control information and retransmit retransmission of information, also comprise the information requirements of requirement good communication quality.
Therefore, according to present embodiment 3, system is that bit data and parity check bit data are modulated independently of each other, and modulation system is fixed as the less modulation system of many-valued number, therefore are requirements when having the control information of good communication quality and re-transmission retransmission of information etc. when sending data, can make the improvement that takes into account error rate characteristic and the raising of transmitting efficiency.In addition, the system bits data and the parity check bit data of separate modulation are carried out spread processing, carry out OFDM then, thereby can further improve the error rate characteristic that sends data.
In present embodiment 3, modulation system is set at QPSK, but modulation system is not limited only to QPSK, also can use the few any modulation system of many-valued number except that QPSK.In addition, all modulate according to QPSK according to present embodiment 3, the 1 modulation portion 103a and the 2nd modulation portion 103b, but they also needn't always set identical modulation system for, the 1st modulation portion 103a can be set at different modulation systems with the 2nd modulation portion 103b.
Note if system bits data and parity check bit data all use 16QAM as modulation system, so also can adopting the executive system position to be disposed at the method for the processing of polarity position because the system bits data require better communication quality than parity check bit data.So just, make the system bits data can obtain good error rate characteristic.
Therefore yet the quality of the polarity position of 16QAM is lower than the quality of QPSK, even system bits is disposed at the polarity position, compares above-mentioned execution mode 1 and execution mode 2 error rate characteristic have still worsened.In addition, the processing that system bits is disposed at the polarity position needs following particular processing: will send data and be divided into two systems, and these data are disposed at polarity position and the amplitude position of 16QAM respectively, therefore deal with more complicated more than above-mentioned execution mode 1 and execution mode 2.In addition, 8PSK, QPSK and BPSK can't carry out the processing that system bits is disposed at the polarity position, but for the situation of execution mode 1 and execution mode 2 to modulation system just without any restriction.
(execution mode 4)
Fig. 9 is the block diagram of expression according to the dispensing device structure of embodiment of the present invention 4.
As shown in Figure 9, comprise turbo encoding section 801 according to embodiment of the present invention 4 dispensing devices 800, spread spectrum device 802, spread spectrum portion 803, parallel/serial (P/S) converter section 804, wireless transmission part 805 and antenna 806.Spread spectrum device 802 comprises a plurality of spread spectrum 802-1 of portion, 802-2, and the 802-3 of addition portion.
The input of the 802-1 of spread spectrum portion, 802-2 and spread spectrum portion 803 is connected to the output of turbo encoding section 801.The input of the 802-3 of addition portion is connected to the output of the 802-1 of spread spectrum portion, 802-2.Parallel/the input of serial conversion portion 804 is connected to the output of 802-3 of addition portion and spread spectrum portion 803.The output of the input of wireless transmission part 805 is connected to parallel/serial conversion portion 804.The input of antenna 806 is connected to the output of wireless transmission part 805.
Spread spectrum device 802 is to from a plurality of different spreading codes of the system bits data allocations of turbo encoding section 801, and the system bits data are carried out spread spectrum, the system bits data of spread spectrum is carried out multiplexing, and the system bits data after multiplexing is delivered to parallel/serial conversion portion 804.
That is to say that the 802-1 of spread spectrum portion, 802-2 carry out spread spectrum to from the different spreading code of the system bits data allocations of turbo encoding section 801 with the system bits data, and the system bits data behind the spread spectrum are delivered to the 802-3 of addition portion.The 802-3 of addition portion from the 802-1 of spread spectrum portion, 802-2 receive spread spectrum the system bits data, data are carried out multiplexing, and the system bits data after multiplexing are delivered to parallel/serial conversion portion 804.
In addition, spread spectrum portion 803 receives the parity check bit data from turbo encoding section 801, for the parity check bit data distribute a spreading code with its spread spectrum, and with spread spectrum the parity check bit data output to P/S converter section 804.
P/S converter section 804 will be from the system bits data of the 802-3 of addition portion and the signal be modulated to the modulation of serial of a system from the parity check bit data of spread spectrum portion 803 after, and the signal after will modulating sends to wireless transmission part 805.Wireless transmission part 805 receives signal after the modulation from P/S converter section 804, and the signal after will modulating sends by antenna 806.
Embodiments of the present invention 4 also can be used like this and be following structure: spread spectrum device portion 802 to the system bits data allocations more than 3 or 3 different a plurality of spreading codes with its spread spectrum, system bits data behind the spread spectrum are carried out multiplexing, and with spread spectrum the system bits data after multiplexing are delivered to P/S converter section 804.In addition, in embodiments of the present invention 1, the spread spectrum yardage of spread spectrum device 802 can be based on channel quality (as RSSI) and multipath delay jitter time information and is changed.In addition, in embodiments of the present invention 4, also can for number of parity check bits according to distributing a plurality of spreading codes, or make a plurality of spread spectrum yardages of parity check bit data variable, or the spreading code base that makes the parity check bit data is in channel quality (as RSSI) and multipath delay jitter time information and change.
Therefore, according to the embodiment of the present invention 4, because the quantity of spreading code of distributing to the system bits data that require good channel quality is more than the quantity of the spreading code of distributing to the parity check bit data that channel quality can be lower, thereby can take into account the improvement that makes error rate characteristic and the raising of transmitting efficiency.
(execution mode 5)
With reference to the accompanying drawings embodiments of the present invention 5 are elaborated below.Figure 10 is the block diagram of expression according to the dispensing device structure of embodiment of the present invention 5.In embodiments of the present invention 5, attached with 4 kinds of identical component parts of embodiment of the present invention with identical reference numbers label, and omit its related description.
As shown in figure 10, comprise turbo encoding section 801 according to the dispensing device 900 of embodiment of the present invention 5, spread spectrum portion 901, spread spectrum portion 803, spread spectrum rate configuration part 902, parallel/serial conversion portion 804, wireless transmission part 805 and antenna 806.
The input of spread spectrum portion 901 is connected to the output of turbo encoding section 801.The output of spread spectrum portion 901 is connected to the input of P/S converter section 804.The output of spread spectrum rate configuration part 902 is connected to the control end of spread spectrum portion 803 and spread spectrum portion 901.Spread spectrum rate configuration part 902 set the 1st spread spectrum rates and than the 1st spread spectrum rate bigger the 2nd spread spectrum rate, the 1st spread spectrum rate is delivered to spread spectrum portion 803, the 2nd spread spectrum rate is delivered to spread spectrum portion 901.
In addition, spread spectrum portion 901 carries out spread spectrum with the 2nd spread spectrum rate with the system bits data with the system bits data of a frequency spreading code division dispensing from turbo encoding section 801, and the system bits data behind the spread spectrum are delivered to P/S converter section 804.
Embodiments of the present invention 5 also can be used like this and be following structure: the spread spectrum device 802 shown in Fig. 9 replaces spread spectrum portion 901, the big spread spectrum rate of a plurality of ratio the 1st spread spectrum rates is sent to the 802-1 of spread spectrum portion, the 802-2 of spread spectrum device 802, and the system bits data are used a plurality of spreading codes of wherein distribution and with described and a plurality of spread spectrum rates its system bits data carried out spread spectrum.
In addition, in embodiments of the present invention 5, the spread spectrum rate that also can make spread spectrum portion 803,901 is based on channel quality (as RSSI) and multipath delay jitter time information and change.In addition, can make any one spread spectrum rate of spread spectrum portion 803,901 all is self-adapting changeable.In addition, in embodiments of the present invention 5, the parity check bit data also can be come spread spectrum with a plurality of spread spectrum rates, and a plurality of spread spectrum rates of parity check bit data also can be made as variablely, and a plurality of spread spectrum rates of parity check bit data also can be based on channel quality (for example RSSI) and multipath delay jitter time information and change.
Therefore, according to the embodiment of the present invention 5, require the spread spectrum rate of the system bits data of good channel quality to be set to test the spread spectrum rate of bit data than odd even school bigger, thereby can take into account the improvement of error rate characteristic and the raising of transmitting efficiency.
(execution mode 6)
To describe embodiments of the present invention 6 with reference to the accompanying drawings below.Figure 11 is the block diagram of expression according to the dispensing device structure of embodiment of the present invention 6.Figure 11 has represented the operation according to the dispensing device of embodiment of the present invention 6.In embodiments of the present invention 6, attached with component part identical in the embodiment of the present invention 4 with same reference numbers number, and omit its related description.
As shown in figure 11, having added OFDM device 1001 according to the dispensing device 1000 of embodiment of the present invention 6 by the dispensing device 800 according to embodiment of the present invention 4 constitutes.
That is to say, comprise turbo encoding section 801 according to the dispensing device 1000 of embodiment of the present invention 6, spread spectrum device 802, spread spectrum portion 803, parallel/serial conversion portion 804, OFDM (OFDM) device 1001, wireless transmission part 805 and antenna 806.Spread spectrum device portion 802 comprises a plurality of spread spectrum 802-1 of portion, 802-2 and the 802-3 of addition portion.
The input of OFDM device 1001 is connected to the output of P/S converter section 804.The output of OFDM device 1001 is connected to the input of wireless transmission part 805.
For example, as shown in figure 12, it is to 1/5 of number of subcarriers that OFDM device 1001 is set spreading ratio, all subcarriers are divided into 5 groups of G1 to G5, and will each is organized to G5 from the system bits data of the modulation signal of parallel/serial conversion portion 104 and the G1 that the parity check bit data are assigned to subcarrier respectively.In this case, parallel/signal after serial conversion portion 804 will modulate is reconfigured for subcarricr structure as shown in Figure 12.Notice that spreading ratio is not limited only to 1/5 of number of sub, and can be arbitrary value.In addition, the spreading ratio of every group of subcarrier does not need always identical, but can be made as arbitrary value.
Therefore, except the effect of execution mode 4, the communication mode (generally being called " CDMA multiple carrier mode ") that embodiments of the present invention 6 also provide cdma communication mode and multi-carrier communication mode (comprising the OFDM mode) to be combined to, wherein, be respectively each subcarrier setting signal multiplexing number, each subcarrier excessively increases thereby can prevent to retransmit the repeating transmission number of times in multipath environment for retransmitting number of times and increase along with retransmitting for the spread spectrum yardage of wanting retransmitted subscriber signal to distribute.
In addition; according to the embodiment of the present invention 6; the CDMA multiple carrier mode can remove interference between the adjacent code in the multipath environment by the guard block interval, thereby has improved the error rate under the multipath environment up hill and dale than CDMA mode, and has further prevented to retransmit the increase of retransmitting number of times.
According to execution mode 1 and execution mode 2, use 16QAM and QPSK to carry out Adaptive Modulation, but Adaptive Modulation is not limited only to 16QAM and QPSK, also can use except 16QAM and QPSK as modulation systems such as 8PSK and BPSK.In addition, in execution mode 1 and execution mode 2, when the 1st modulation portion was modulated the system bits data, the 2nd modulation portion was modulated the parity check bit data, but the present invention is not limited to this, also can adopt a modulation portion to come modulating system position and parity check bit.In addition, in execution mode 1 and execution mode 2, judge communication quality based on the RSSI signal, but the present invention is not limited to this, if can judge communication quality by there being signal except the RSSI signal to wait, the present invention also can use the signal except the RSSI signal to wait to judge communication quality.In addition, can be used for as CDMA OFDM, OFDM-CDMA, any communication modes such as CDMA multiple carrier and single carrier according to execution mode 1 to the dispensing device and the sending method of execution mode 6.In addition, also be applicable to base station apparatus and communication terminal according to execution mode 1 to the dispensing device and the sending method of execution mode 6.
As mentioned above, the present invention can take into account error rate characteristic and transmitting efficiency further.
This specification is based on the Japanese patent application of submitting on October 31st, 2002 2002-317728 number and the Japanese patent application on December 2nd, 2002 2002-350026 number, and its full content all is contained in this for reference.
The present invention relates to a kind of dispensing device and sending method, be particularly useful for sending dispensing device and the sending method of using the transmission data that turbo encoder encodes.
Claims (8)
1. dispensing device comprises:
Addressable part carries out the spy to the transmission data and broadcasts coding and output system bit data and parity check bit data;
Control assembly, at communication quality is that first value is when above, second modulation system that first modulation system of the many-valued number of modulation described system bits data of setting when being lower than described first value at communication quality is also Duoed, be set at the modulation system of described system bits data, and at communication quality is that second value lower than first value is when above, with described second modulation system that described first modulation system of the many-valued number of modulation described parity check bit data of setting when being lower than described second value at communication quality is also Duoed, be set at the modulation system of described parity check bit data;
Modulating part with described first modulation system or described second modulation system that described control assembly is set, is modulated independently of each other to described system bits data and described parity check bit data; And
Transmit block sends the described system bits data and the described parity check bit data of modulating through described modulating part.
2. dispensing device as claimed in claim 1, wherein, when the communication quality requirement of described transmission data is better than the communication quality of other data except that described transmission data, described modulating part is modulated described system bits data and described parity check bit data according to less described first modulation system or described second modulation system of many-valued number than the 3rd modulation system of described other data.
3. dispensing device as claimed in claim 2, wherein, described transmission data are information or the retransmission of information that are used for Control on Communication.
4. dispensing device as claimed in claim 1, wherein, described dispensing device comprises: the spread spectrum parts, carry out spread spectrum to described system bits data and parity check bit data after the modulation; And the OFDM parts, the signal behind the spread spectrum is carried out OFDM.
5. dispensing device as claimed in claim 4, wherein, the spread spectrum rate of described transmission spread spectrum parts is set at " 1 ", and the sign indicating number multiplexing number of transmission signal also is set at " 1 ".
6. base station apparatus that has dispensing device, described dispensing device comprises:
Addressable part carries out the spy to the transmission data and broadcasts coding and output system bit data and parity check bit data;
Control assembly, at communication quality is that first value is when above, second modulation system that first modulation system of the many-valued number of modulation described system bits data of setting when being lower than described first value at communication quality is also Duoed, be set at the modulation system of described system bits data, and at communication quality is that second value lower than first value is when above, with described second modulation system that described first modulation system of the many-valued number of modulation described parity check bit data of setting when being lower than described second value at communication quality is also Duoed, be set at the modulation system of described parity check bit data;
Modulating part with described first modulation system or described second modulation system that described control assembly is set, is modulated independently of each other to described system bits data and described parity check bit data; And
Transmit block sends the described system bits data and the described parity check bit data of modulating through described modulating part.
7. communication terminal that has dispensing device, described dispensing device comprises:
Addressable part carries out the spy to the transmission data and broadcasts coding and output system bit data and parity check bit data;
Control assembly, at communication quality is that first value is when above, second modulation system that first modulation system of the many-valued number of modulation described system bits data of setting when being lower than described first value at communication quality is also Duoed, be set at the modulation system of described system bits data, and at communication quality is that second value lower than first value is when above, with described second modulation system that described first modulation system of the many-valued number of modulation described parity check bit data of setting when being lower than described second value at communication quality is also Duoed, be set at the modulation system of described parity check bit data;
Modulating part with described first modulation system or described second modulation system that described control assembly is set, is modulated independently of each other to described system bits data and described parity check bit data; And
Transmit block sends described system bits data and described parity check bit data through described modulating part modulation.
8. sending method comprises:
The transmission data are carried out the spy broadcast coding and the step of output system bit data and parity check bit data;
At communication quality is that first value is when above, second modulation system that first modulation system of the many-valued number of modulation described system bits data of setting when being lower than described first value at communication quality is also Duoed, be set at the modulation system of described system bits data, and at communication quality is that second value lower than first value is when above, with described second modulation system that described first modulation system of the many-valued number of modulation described parity check bit data of setting when being lower than described second value at communication quality is also Duoed, be set at the step of the modulation system of described parity check bit data;
With described first modulation system or described second modulation system of setting, the step that described system bits data and described parity check bit data are modulated independently of each other; And
The described system bits data after the transmission modulation and the step of described parity check bit data.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002317728A JP3619821B2 (en) | 2002-10-31 | 2002-10-31 | Transmitting apparatus and transmitting method |
| JP317728/2002 | 2002-10-31 | ||
| JP350026/2002 | 2002-12-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1692595A CN1692595A (en) | 2005-11-02 |
| CN100463388C true CN100463388C (en) | 2009-02-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2003801005197A Expired - Fee Related CN100463388C (en) | 2002-10-31 | 2003-10-29 | Transmitting device and transmitting method |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP3619821B2 (en) |
| CN (1) | CN100463388C (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4224329B2 (en) | 2003-03-25 | 2009-02-12 | パナソニック株式会社 | Encoding apparatus and encoding method |
| US9385843B2 (en) * | 2004-12-22 | 2016-07-05 | Qualcomm Incorporated | Method and apparatus for using multiple modulation schemes for a single packet |
| PL3148143T3 (en) * | 2005-09-30 | 2018-07-31 | Optis Wireless Technology, Llc | Radio transmission device, and radio transmission method based on offset information for adjusting the data coding rate and the control information coding rate |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0935363A1 (en) * | 1997-06-19 | 1999-08-11 | Kabushiki Kaisha Toshiba | Information data multiplexing transmission system, multiplexer and demultiplexer used therefor, and error correcting encoder and decoder |
| JP2002198938A (en) * | 2000-12-27 | 2002-07-12 | Matsushita Electric Ind Co Ltd | Transmitting set, receiving set and communication method |
| EP1235404A1 (en) * | 2000-09-21 | 2002-08-28 | Matsushita Electric Industrial Co., Ltd. | Wireless transmission device and transmission signal mapping method |
-
2002
- 2002-10-31 JP JP2002317728A patent/JP3619821B2/en not_active Expired - Fee Related
-
2003
- 2003-10-29 CN CNB2003801005197A patent/CN100463388C/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0935363A1 (en) * | 1997-06-19 | 1999-08-11 | Kabushiki Kaisha Toshiba | Information data multiplexing transmission system, multiplexer and demultiplexer used therefor, and error correcting encoder and decoder |
| EP1235404A1 (en) * | 2000-09-21 | 2002-08-28 | Matsushita Electric Industrial Co., Ltd. | Wireless transmission device and transmission signal mapping method |
| JP2002198938A (en) * | 2000-12-27 | 2002-07-12 | Matsushita Electric Ind Co Ltd | Transmitting set, receiving set and communication method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3619821B2 (en) | 2005-02-16 |
| JP2004153640A (en) | 2004-05-27 |
| CN1692595A (en) | 2005-11-02 |
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