CN101166170B - A simple transmission and receiving device and method based on multi-sub band filter groups - Google Patents

A simple transmission and receiving device and method based on multi-sub band filter groups Download PDF

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CN101166170B
CN101166170B CN2006101173323A CN200610117332A CN101166170B CN 101166170 B CN101166170 B CN 101166170B CN 2006101173323 A CN2006101173323 A CN 2006101173323A CN 200610117332 A CN200610117332 A CN 200610117332A CN 101166170 B CN101166170 B CN 101166170B
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data block
parallel
data
sequence
subband
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CN101166170A (en
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李明齐
张小东
李元杰
芮赟
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Shanghai Jushri Technologies, Inc.
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Shanghai Institute of Microsystem and Information Technology of CAS
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Abstract

The method includes steps: using sub band mapping to map modulation symbols to pointed sub band for transmission; next, through IDFT transform to form signal of multiple sub bands (MSB) in time domain (TD); then, through phase shifting and periodic expand to form signal of MSB with shifted frequency and expanded cycle in TD; carrying out waveform shaping and frequency spectrum shaping signal of MSB in TD; finally; using shifted overlap carries out waveform multiplexing in TD for shaped waveform symbol so as to form transmission symbol. The receiver of the filter set in MSB divides up the received data sequence into multiple data blocks, and each data block is equal to length of prototype filter; and then, carries out operations including waveform matching, phase shafting, DFT etc for the data block so as to obtain data symbol transmitted on pointed sub band. The invention can implement transmitting and receiving signal of multicarrier transmission system based on filter set in MSB.

Description

A kind of simple apparatus and method that transmit and receive based on many Methods of Subband Filter Banks
Technical field
The invention belongs to the wide-band mobile communication technical field, particularly a kind of simple devices and methods therefor that transmits and receives based on many Methods of Subband Filter Banks.
Background technology
In recent years, wireless communication system develops rapidly towards the broadband direction.Be accompanied by this development trend, the bandwidth that the wireless communication system single channel occupies is more and more higher, the also sustainable growth of the complexity of wireless receiver, and implementation complexity is more and more higher.Simultaneously, according to discovering in recent years, for the throughput of effective elevator system, the combination multiple access technology of frequency division multiple access technology (FDMA) and tdma (TDMA) will become the main multiple access technology of future mobile.Based on such technical need, multi-carrier modulation technology is subjected to academia and industrial quarters is more and more paid close attention to, and on the one hand, based on multi-carrier modulation technology, the complexity of receiver can be simplified greatly; On the other hand,, the mixing multiple access technology of FDMA and TDMA be can realize at an easy rate, the optimization and the enhancing of power system capacity are convenient to very much based on multi-transceiver technology.
Under present condition, realize that the means of multi-carrier modulation technology mainly contain two kinds: a kind of is that the basis is expanded accordingly with orthogonal frequency division multiplexi (OFDM), to form the multiple access scheme; Another is that the basis is expanded accordingly with many band filters group (MBFB), thereby forms the multiple access scheme.
The OFDM modulation is divided into many mutually orthogonal subchannels with whole broad-band channel, and each subchannel is distributed to each user with exclusive mode, forms OFDMA.Owing to connect in the road in the descending of wireless communication system, for each user, the orthogonality ratio between each subchannel is easier to obtain, and therefore adopts OFDMA, and the multiple access that can solve preferably between the multi-user disturbs (MAI).Yet in the up link of wireless communication system, if adopt OFDMA, receiving terminal (such as the base station) must be to the multiple user signals joint demodulation that inserts simultaneously.Because transmitting of each user be relatively independent, thus OFDMA cannot say for sure to demonstrate,prove between the necessary subscriber signal of joint demodulation synchronously.When having bigger carrier wave frequency deviation and Doppler frequency shift between each subscriber signal, certainly will cause serious interference among multiple users.Many band filters group can be divided into whole broad-band channel many quasiorthogonal subchannels (subband) mutually; each subband has precipitous frequency spectrum edge; and certain frequency domain protection can be set at interval between the adjacent sub-bands; therefore adopt the FDMA system that constitutes based on many Methods of Subband Filter Banks, stronger to the robustness of the carrier wave frequency deviation of each subscriber signal and Doppler frequency shift.
Existing FDMA system based on many Methods of Subband Filter Banks adopts threshold sampling (critical sample) mostly, and promptly the prototype filter up-sampling rate of many Methods of Subband Filter Banks is identical with bank of filters sub-band sum order.This moment, adjacent sub-bands was-the 3dB overlapping, did not promptly have the frequency domain protection between the adjacent sub-bands at interval.When this FDMA system is used for radio communication system up link, certainly will exist bigger multiple access to disturb.
For the FDMA system of many Methods of Subband Filter Banks of non-critical sampling (non-critical sample), the prototype filter up-sampling rate of many Methods of Subband Filter Banks is slightly larger than bank of filters sub-band sum order.Like this, will promptly there be certain frequency domain protection in the cross over point of adjacent sub-bands at interval less than-3dB between the adjacent sub-bands.Thereby can improve the multiple access interference robust of this FDMA system.
In addition, for reducing the requirement of transmitting terminal logarithmic mode transducer and RF frequency converter, need to reduce DC component based on the FDMA system baseband signal of many Methods of Subband Filter Banks.This can realize at interval by half sub-bands of frequencies of frequency spectrum shift with transmission signals, is about to the cross over point place of DC component alignment adjacent sub-bands.
At present, the scheme that transmits and receives for based on many Methods of Subband Filter Banks of non-critical sampling (non-critical sample) particularly exists under the condition of frequency spectrum shift, also unified simple implementation method.
Summary of the invention
The present invention promptly is at the FDMA system based on many Methods of Subband Filter Banks of non-critical sampling (non-critical sample) that has frequency spectrum shift, proposes a kind of simply based on the apparatus and method that transmit and receive of many Methods of Subband Filter Banks.At the transmitting terminal of many Methods of Subband Filter Banks,, modulation symbol is mapped on the subband of appointment and transmits at first by subband mapping.Subsequently, by the IDFT conversion, form the many subband signals of time domain.Then expand, form the many subband signals of time domain of subband frequency displacement and cycle expansion by time domain phase shift and cycle.Then this signal is carried out Waveform shaping and spectral shaping.At last by displacement stack, it is multiplexing that the tilde after the moulding is carried out time domain waveform, forms transmission signals.Receiving terminal in many Methods of Subband Filter Banks, at first the data sequence that receives is divided into the data block identical with prototype filter length, respectively this data block is carried out Waveform Matching then, data block merges, phase shift, operations such as discrete fourier transition and subband solutions mapping obtain the data symbol that transmits on the subband of appointment.
For reaching above-mentioned purpose, the present invention adopts following technical scheme:
A kind of simply based on the emitter of many Methods of Subband Filter Banks, it is characterized in that comprising:
String and conversion equipment are used for modulated string character data sequence is gone here and there and conversion operations;
The subband mapping device is used for being mapped to respectively on the corresponding subband through each element of each data block of string and conversion and transmits;
The IDFT converting means is used for each parallel symbol data block of subband mapping device output is carried out the IDFT conversion;
Phase changer, be used for to the element of each parallel time domain symbol data piece of IDFT conversion output respectively correspondence be multiplied by the phase shift factor, this phase shift factor depends on the sub-bands of frequencies side-play amount;
The data block cascade unit is used for after being multiplied by different phase shift factor through the data block integral body of phase shift, cascade repeatedly, phase shift factor depends on the sub-bands of frequencies side-play amount;
The Waveform shaping device is used for the parallel data block Waveform shaping to exporting after the data block cascade;
Parallel/serial conversion equipment is used for the parallel data block behind the Waveform shaping being carried out and going here and there conversion;
The waveform synthesizer, be used for and the sequence of blocks of data of string conversion output by the stack that is shifted of the up-sampling rate of prototype filter.
A kind of simply based on the launching technique of many Methods of Subband Filter Banks, may further comprise the steps:
String and switch process are used for modulated string character data sequence is gone here and there and conversion operations;
The subband mapping step is used for being mapped to respectively on the corresponding subband through each element of each data block of string and conversion and transmits;
The IDFT shift step is used for each parallel symbol data block of subband mapping step output is carried out the IDFT conversion;
Phase shift steps, be used for to the element of each parallel time domain symbol data piece of IDFT conversion output respectively correspondence be multiplied by the phase shift factor, this phase shift factor depends on the sub-bands of frequencies side-play amount;
Data block cascade step is used for after being multiplied by different phase shift factor through the data block integral body of phase shift, cascade repeatedly, phase shift factor depends on the sub-bands of frequencies side-play amount;
The Waveform shaping step is used for the parallel data block Waveform shaping to exporting after the data block cascade;
Parallel/serial switch process is used for the parallel data block behind the Waveform shaping being carried out and going here and there conversion;
The waveform synthesis step, be used for and the sequence of blocks of data of string conversion output by the stack that is shifted of the up-sampling rate of prototype filter.
A kind of simply based on the receiving system of many Methods of Subband Filter Banks, comprising:
The waveform decomposer is used to finish the corresponding inverse operation of transmitting terminal waveform synthesizer;
Serial/parallel conversion equipment, the sequence of blocks of data that is used for importing from the serial of described waveform decomposer is converted to the parallel data block sequence; The Waveform Matching device is used for the parallel data block Waveform Matching to serial/parallel conversion back output;
Data block merges device, be used for that the data block through Waveform Matching is divided into L/M section size earlier and be the data block of M then the data block that each M is ordered to be multiplied by phase shift factor respectively, at last with this L/M data block stack, forming length is the data block of M, and wherein L is a prototype filter length; Phase changer, be used for to data block merge output each parallel time domain symbol data piece M element respectively correspondence be multiplied by the phase shift factor, phase shift factor depends on the sub-bands of frequencies side-play amount;
The DFT converting means is used for the symbol sebolic addressing through phase shift is carried out M point DFT conversion;
The subband solutions mapping device is used for the output signal of described DFT converting means is finished and the opposite inverse operation of transmitting terminal subband mapping device; Parallel/serial conversion equipment is used for the sequence of blocks of data of described subband solutions mapping device output is carried out parallel/serial conversion operations.
A kind of simply based on the method for reseptance of many Methods of Subband Filter Banks, comprising:
The waveform decomposition step is used to finish the corresponding inverse operation of transmitting terminal waveform synthesizer;
Serial/parallel switch process, the sequence of blocks of data that is used for importing from the serial of described waveform decomposer is converted to the parallel data block sequence; The Waveform Matching step is used for the parallel data block Waveform Matching to serial/parallel conversion back output;
The data block combining step, be used for that the data block through Waveform Matching is divided into L/M section size earlier and be the data block of M then the data block that each M is ordered to be multiplied by phase shift factor respectively, at last with this L/M data block stack, forming length is the data block of M, and wherein L is a prototype filter length;
Phase shift steps, be used for to data block merge output each parallel time domain symbol data piece M element respectively correspondence be multiplied by the phase shift factor, phase shift factor depends on the sub-bands of frequencies side-play amount; The DFT shift step is used for the symbol sebolic addressing through phase shift is carried out M point DFT conversion; The subband solutions mapping step is used for the output signal of described DFT converting means is finished and the opposite inverse operation of transmitting terminal subband mapping device; Parallel/serial switch process is used for the sequence of blocks of data of described subband solutions mapping device output is carried out parallel/serial conversion operations.
The present invention can effectively realize transmitting and receiving based on the multicarrier transmission systems signal of many Methods of Subband Filter Banks.And by the time domain phase shift, can finish the frequency domain subband spectrum of transmission signals and move, when frequency spectrum shift is half sub-bands of frequencies interval, can reduces the DC component of baseband signal, thereby reduce the requirement of transmitting terminal logarithmic mode transducer and RF frequency converter.
Further specify the present invention below in conjunction with drawings and Examples.
Description of drawings
Fig. 1 is the emitter based on many Methods of Subband Filter Banks;
Fig. 2 is the receiving system based on many Methods of Subband Filter Banks;
Fig. 3 is the frequency spectrum that transmits based on many Methods of Subband Filter Banks that does not have subband spectrum to move;
The frequency spectrum that transmits that Fig. 4 exists subband spectrum to move based on many Methods of Subband Filter Banks.
Embodiment
Fig. 1 illustrate a kind of according to the present invention an embodiment realize block diagram based on the emitter of many Methods of Subband Filter Banks.Comprising a serial/parallel conversion equipment 11, subband mapping device 12,13, phase changer of the contrary discrete fourier transition (IDFT) that M is ordered device 14, data block cascade unit 15, Waveform shaping device 16, a parallel/serial conversion equipment 17 and a waveform synthesizer 18.
Need to prove, as the channel coding device of digital communication system transmitter necessary component, digital modulation device, baseband signal framing device, RF converter plant and transmitting antenna and purpose of the present invention there is no direct relation, are not described at this.
Suppose { a k, k=0,1,2...} is the serial modulated symbols sequence that is input to string and conversion equipment 11;
String and conversion equipment 11 are used for modulated string character data sequence { a k, k=0,1,2....} goes here and there and conversion operations, to form corresponding a plurality of parallel symbol data block { b k, k=0,1,2....}, here, b kRepresent a column vector, the number of sub-bands K that the size of this vector equals to take;
Subband mapping device 12 is used for each the data block b through string and conversion kIn each element be mapped to respectively on the corresponding subband and transmit, for the subband transmission 0 that does not have data map.Through the subband mapping device, the sequence of blocks of data { b that input is parallel k, k=0,1,2...} is transformed into corresponding data block sequence { c k, k=0,1,2 ..., c kRepresent that also a number of elements is the column vector of M, wherein M is the size of IDFT conversion in the IDFT converting means 13.
IDFT converting means 13 is used for each the parallel symbol data block c to input kCarry out M point IDFT conversion.The IDFT conversion M that counts equals the total number of sub-bands of many Methods of Subband Filter Banks.Through the IDFT conversion module, the sequence of blocks of data { c that input is parallel k, k=0,1,2....} is transformed into corresponding data block sequence { d k, k=0,1,2....}, relation is each other obeyed d k ( n ) = 1 M Σ m = 0 M - 1 c k ( m ) exp ( j 2 πmn / M ) , n = 0 , . . . , M - 1 , Here, d kAlso represent a number of elements and the same column vector of IDFT transform size M.
Phase changer 14 is used for each parallel time domain symbol data piece d that the IDFT conversion is exported kIn M element respectively correspondence be multiplied by the phase shift factor.Phase shift factor depends on the sub-bands of frequencies side-play amount.Through phase shifting equipment, the sequence of blocks of data { d that input is parallel k, k=0,1,2....} is transformed into corresponding data block sequence { e k, k=0,1,2....}, relation is each other obeyed e k(n)=d k(n) exp (j2 π n ξ/M), and n=0 ..., M-1}.ξ is that intersubband is every normalized frequency offset.Here, e kRepresent that also a number of elements is the column vector of M, M equals the total number of sub-bands of many Methods of Subband Filter Banks.
Data block cascade unit 15 is used for the data block e through phase shift kAfter integral body is multiplied by different phase shift factor, cascade R time.Phase shift factor depends on the sub-bands of frequencies side-play amount.Through the data block cascade unit, the sequence of blocks of data { e that input is parallel k, k=0,1,2....} is transformed into corresponding parallel data block sequence { g k, k=0,1,2....}, relation is each other obeyed g k(n '+mM)=e k(n ') exp (j2 π m ξ), and n '=0 ..., M-1; M=0 ..., R-1}, M equal the total number of sub-bands of many Methods of Subband Filter Banks, and M * R=L, and L is the prototype filter length of many Methods of Subband Filter Banks correspondence.Here, g kRepresent that also a number of elements is the column vector of L.Especially, when frequency offset ξ be 0.5 intersubband every the time, g K(n '+mM)=e k(n ') (1) m
Waveform shaping device 16 is used for the parallel data block Waveform shaping to exporting after the data block cascade, and promptly each data block is multiplied by the prototype filter coefficient of many Methods of Subband Filter Banks correspondence.Through Waveform shaping, the sequence of blocks of data { g that input is parallel k, k=0,1,2....} is transformed into corresponding data block sequence { h k, k=0,1,2....}, relation is each other obeyed h k(n)=g k(n) f p(n) { n=0,1,2..., L-1; K=0,1,2 ....{ f wherein p(n), n=0,1,2 ..., L-1} is the prototype filter coefficient (that is impulse response) of many Methods of Subband Filter Banks correspondence.This filter satisfies the shift-orthogonal condition: Σ n = 0 L - 1 f p ( n ) f p * ( n - kN ) = δ ( k ) , Wherein L is a prototype filter length, and N is prototype filter shift-orthogonal interval.Here, h kRepresent that also a number of elements is the column vector of L.
Parallel/serial conversion equipment 17 is used for the parallel data block behind the Waveform shaping being carried out and going here and there conversion.Process and string conversion equipment, the serial data block sequence of output is { l k(n), n=0,1,2..., L-1; K=0,1,2 ..., l here kBe expressed as the serial data block that block length is L, and l k ( n ) = Σ m = 0 M - 1 c k ( m ) f p ( n ) exp ( j 2 π ( m - ξ ) n / M ) , n = 0 , 1,2 . . . , L - 1 .
Waveform synthesizer 18, be used for and the sequence of blocks of data of string conversion output by the up-sampling rate N of the prototype filter stack that is shifted.Particularly, at k constantly, be that the preceding N point data of the data sequence of L sends with the length that generates in the past, get remaining L-N point data again, after afterbody adds N zero, with k constantly and the L point data piece addition of string conversion output, constitute new data sequence; And k+1 constantly will this newly-generated sequence preceding N point data send, get remaining L-N point data again, after afterbody adds N zero, with k+1 constantly and the L point data piece addition of string conversion output, formation data updated sequence.So go round and begin again.Through the waveform synthesizer, output sequence is s ( n ) = Σ k = 0 D l k ( n - kN ) . Further, s ( n ) = Σ k = 0 D Σ m = 0 M - 1 c k ( m ) f p ( n - kN ) exp ( j 2 π ( m - ξ ) ( n - kN ) / M ) . D is the multiplexing number of time domain waveform, can be any positive integer.Here, and s (n), n=0,1 ... (D-1) * and N+L-1}, represent that also length is the row vector of (D-1) * N+L.
A kind of simply based on the launching technique of many Methods of Subband Filter Banks, may further comprise the steps:
String and switch process are used for modulated string character data sequence is gone here and there and conversion operations;
The subband mapping step is used for being mapped to respectively on the corresponding subband through each element of each data block of string and conversion and transmits;
The IDFT shift step is used for each parallel symbol data block of subband mapping step output is carried out the IDFT conversion;
Phase shift steps, be used for to the element of each parallel time domain symbol data piece of IDFT conversion output respectively correspondence be multiplied by the phase shift factor, this phase shift factor depends on the sub-bands of frequencies side-play amount;
Data block cascade step is used for after being multiplied by different phase shift factor through the data block integral body of phase shift, cascade repeatedly, phase shift factor depends on the sub-bands of frequencies side-play amount;
The Waveform shaping step is used for the parallel data block Waveform shaping to exporting after the data block cascade;
Parallel/serial switch process is used for the parallel data block behind the Waveform shaping being carried out and going here and there conversion;
The waveform synthesis step, be used for and the sequence of blocks of data of string conversion output by the stack that is shifted of the up-sampling rate of prototype filter.
Above-mentioned detailed description existing corresponding with it description in based on the emitter of many Methods of Subband Filter Banks based on each step in the launching technique of many Methods of Subband Filter Banks, it is serial/parallel switch process, the subband mapping step, contrary discrete fourier transition (IDFT) step that M is ordered, phase shift steps, data block cascade step, the Waveform shaping step, parallel/serial switch process and waveform synthesis step be corresponding serial/parallel conversion equipment 11 respectively, subband mapping device 12, contrary discrete fourier transition (IDFT) device 13 that M is ordered, phase changer 14, data block cascade unit 15, Waveform shaping device 16, the operation of parallel/serial conversion equipment 17 and waveform synthesizer 18 correspondences is in the detailed description of this omission to each step.
Fig. 2 illustrate a kind of according to the present invention an embodiment realize block diagram based on the receiving system of many Methods of Subband Filter Banks.Comprising a waveform decomposer 21,22, one Waveform Matching devices 23 of serial/parallel conversion equipment, a data block merges discrete fourier transition (DFT) device 26 that 25, one M of 24, one phase changers of device are ordered, 27, one parallel/serial conversion equipments 28 of a subband solutions mapping device.
Need to prove, reception antenna as digital communication system receiver necessary component, the RF converter plant, synchronizer, channel estimating and balancer, baseband signal is separated the frame device, and channel decoding device and digital demodulating apparatus and purpose of the present invention there is no direct relation, are not described at this.
Suppose the receiver ideal synchronisation, and s ' (n), and n=0,1 ..., (D-1) * N+L-1} is the serial data sequence that is input to the receiving system of many Methods of Subband Filter Banks;
Waveform decomposer 21 is used to finish transmitting terminal waveform synthesizer 18 corresponding inverse operations, promptly from the serial data sequence of input, presses the shift-orthogonal interval N of the prototype filter of transmitting terminal multiphase filter correspondence, and the serial data that L is ordered is taken out in displacement.The serial data block sequence that waveform decomposes output is { q k(n), n=0,1,2..., L-1; K=0,1,2 ..., D-1}, relation is each other obeyed q k(n)=s ' (n+kN) { n=0,1,2..., L-1; K=0,1,2 ..., D-1}.Here, q kRepresent that a number of elements is the row vector of L.Wherein L is a prototype filter length;
Serial/parallel conversion equipment 22 is used for the sequence of blocks of data { q with the serial input k(n), n=0,1,2..., L-1; K=0,1,2 ..., D-1} is converted to parallel data block sequence { r k(n), n=0,1,2..., L-1; K=0,1,2 ..., D-1}.Here, r kRepresent the column vector that number of elements is L;
Waveform Matching device 23 is used for the parallel data block Waveform Matching to serial/parallel conversion back output, and promptly each data block is multiplied by the prototype filter coefficient of many Methods of Subband Filter Banks correspondence.Through Waveform Matching, the sequence of blocks of data { r that input is parallel k(n), n=0,1,2..., L-1; K=0,1,2 ..., D-1} is transformed into corresponding data block sequence { t k(n), n=0,1,2..., L-1; K=0,1,2 ..., D-1}, relation is each other obeyed t k(n)=r k(n) f p(n) { n=0,1,2..., L-1; K=0,1,2 ....Wherein subscript " * " is represented conjugation, { f p(n), n=0,1,2 ..., L-1} is the prototype filter coefficient (that is impulse response) of many Methods of Subband Filter Banks correspondence.
Data block merges device 24, is used for the data block t through Waveform Matching kBe divided into L/M section size earlier and be the data block of M then the data block that each M is ordered to be multiplied by phase shift factor respectively, with this L/M data block stack, forming length is the data block of M at last.Merge each parallel data block sequence t of input through data block k(n), n=0,1,2..., L-1; K=0,1,2 ..., D-1} is transformed into parallel data block { u k(n), n=0,1,2..., M-1; K=0,1,2 ..., D-1}, relation is each other obeyed u k ( n ) = Σ m = 0 L / M - 1 t k ( n + mM ) exp ( j 2 πmξ ) , {n＝0，1，2，...，M-1；k＝0，1，2，...，D-1}。M equals the total number of sub-bands of many Methods of Subband Filter Banks, and L is the prototype filter length of many Methods of Subband Filter Banks correspondence.ξ is that intersubband is every normalized frequency offset.Here, u kRepresent that also a number of elements is the column vector of M.
Phase changer 25 is used for data block is merged each the parallel time domain symbol data piece u that exports kIn M element respectively correspondence be multiplied by the phase shift factor.Phase shift factor depends on the sub-bands of frequencies side-play amount.Through phase shifting equipment, the sequence of blocks of data { u that input is parallel k(n), n=0,1,2..., M-1; K=0,1,2 ..., D-1} is transformed into corresponding data block sequence { v k(n), n=0,1,2..., M-1; K=0,1,2 ..., D-1}, relation is each other obeyed v k(n)=u k(n) exp (j2 π n ξ/M), { n=0,1,2..., M-1; K=0,1,2 ..., D-1}.ξ is that intersubband is every normalized frequency offset.Here, v kRepresent that also a number of elements is the column vector of M, M equals the total number of sub-bands of many Methods of Subband Filter Banks.
DFT converting means 26 is used for the symbol sebolic addressing { v through phase shift k(n), n=0,1,2..., M-1; K=0,1,2 ..., D-1} carries out M point DFT conversion.Through the DFT conversion, the parallel data sequence of input is transformed into corresponding data block sequence { w k(m), m=0,1,2..., M-1; K=0,1,2 ..., D-1}, relation is each other obeyed w k ( m ) = 1 M Σ n = 0 M - 1 v k ( n ) exp ( - j 2 πmn / M ) , Here, w kRepresent a number of elements and the same column vector of DFT transform size M.
Subband solutions mapping device 27 is used to finish the opposite inverse operation of transmitting terminal subband mapping device 12.Promptly according to the mode of transmitting terminal subband mapping, from data block w through DFT conversion output kThe corresponding K point data of middle taking-up.Through the subband solutions mapping device, be output as sequence of blocks of data { x k(m '), m '=0,1,2..., K-1; K=0,1,2 ..., D-1}, here, x kRepresent that also a number of elements is the column vector of K.
Parallel/serial conversion equipment 28 is used for the sequence of blocks of data { x to input k(m '), m '=0,1,2..., K-1; K=0,1,2 ..., D-1} carries out parallel/serial conversion operations.Through parallel/serial conversion equipment, be output as serial data symbol sebolic addressing { y k(m '), m '=0,1,2..., K-1; K=0,1,2 ..., D-1}, and y k(m ')=x k(m '), { m '=0,1,2..., K-1; K=0,1,2 ..., D-1} is used for the symbol demodulation and the channel-decoding of receiving terminal, to recover the information bit of emission.
A kind of simply based on the method for reseptance of many Methods of Subband Filter Banks, comprising:
The waveform decomposition step is used to finish the corresponding inverse operation of transmitting terminal waveform synthesizer;
Serial/parallel switch process is used for the sequence of blocks of data of serial input is converted to the parallel data block sequence;
The Waveform Matching step is used for the parallel data block Waveform Matching to serial/parallel conversion back output;
The data block combining step is used for that the data block through Waveform Matching is divided into L/M section size earlier and is the data block of M then the data block that each M is ordered to be multiplied by phase shift factor respectively, and with this L/M data block stack, forming length is the data block of M at last;
Phase shift steps, be used for to data block merge output each parallel time domain symbol data piece M element respectively correspondence be multiplied by the phase shift factor, phase shift factor depends on the sub-bands of frequencies side-play amount;
The DFT shift step is used for the symbol sebolic addressing through phase shift is carried out M point DFT conversion;
The subband solutions mapping step is used to finish the opposite inverse operation of transmitting terminal subband mapping device;
Parallel/serial switch process is used for the sequence of blocks of data of input is carried out parallel/serial conversion operations.
Above-mentioned detailed description existing corresponding with it description in based on the receiving system of many Methods of Subband Filter Banks based on each step in the method for reseptance of many Methods of Subband Filter Banks, it is the waveform decomposition step, serial/parallel switch process, the Waveform Matching step, the data block combining step, phase shift steps, the DFT shift step, the subband solutions mapping step, parallel/serial switch process is corresponding waveform decomposer 21 respectively, serial/parallel conversion equipment 22, Waveform Matching device 23, data block merges device 24, phase changer 25, DFT converting means 26, subband solutions mapping device 27, the operation of parallel/serial conversion equipment 28 correspondences is in the detailed description of this omission to each step.
Simulation system parameters such as following table:
Fig. 3 is the frequency spectrum that transmits based on many Methods of Subband Filter Banks that does not have subband spectrum to move, and Fig. 4 is the frequency spectrum that transmits based on many Methods of Subband Filter Banks that exists subband spectrum to move.Comparison diagram 3 and Fig. 4 as seen, 0.5 intersubband of frequency spectrum shift every the time, the DC component that transmits is between adjacent two subbands, than the obvious reduction that transmitted that does not have subband spectrum to move.
Fig. 5 is the system that transmits and receives the not code bit error rate that QPSK modulates under awgn channel based on bank of filters, and by simulation result as seen, the not code bit error rate and the theoretical value of this transmission plan are very approaching.

Claims (21)

1. one kind simply based on the emitter of many Methods of Subband Filter Banks, it is characterized in that comprising:
String and conversion equipment are used for modulated string character data sequence is gone here and there and conversion operations;
The subband mapping device is used for being mapped to respectively on the corresponding subband through each element of each data block of string and conversion and transmits;
The IDFT converting means is used for each parallel symbol data block of subband mapping device output is carried out the IDFT conversion;
Phase changer, be used for to the element of each parallel time domain symbol data piece of IDFT conversion output respectively correspondence be multiplied by the phase shift factor, this phase shift factor depends on the sub-bands of frequencies side-play amount;
The data block cascade unit is used for after being multiplied by different phase shift factor through the data block integral body of phase shift, cascade repeatedly, phase shift factor depends on the sub-bands of frequencies side-play amount;
The Waveform shaping device is used for the parallel data block Waveform shaping to exporting after the data block cascade;
Parallel/serial conversion equipment is used for the parallel data block behind the Waveform shaping being carried out and going here and there conversion;
The waveform synthesizer, be used for and the sequence of blocks of data of string conversion output by the stack that is shifted of the up-sampling rate of prototype filter.
2. one kind simply based on the launching technique of many Methods of Subband Filter Banks, it is characterized in that may further comprise the steps:
String and switch process are used for modulated string character data sequence is gone here and there and conversion operations;
The subband mapping step is used for being mapped to respectively on the corresponding subband through each element of each data block of string and conversion and transmits;
The IDFT shift step is used for each parallel symbol data block of subband mapping step output is carried out the IDFT conversion;
Phase shift steps, be used for to the element of each parallel time domain symbol data piece of IDFT conversion output respectively correspondence be multiplied by the phase shift factor, this phase shift factor depends on the sub-bands of frequencies side-play amount;
Data block cascade step is used for after being multiplied by different phase shift factor through the data block integral body of phase shift, cascade repeatedly, phase shift factor depends on the sub-bands of frequencies side-play amount;
The Waveform shaping step is used for the parallel data block Waveform shaping to exporting after the data block cascade;
Parallel/serial switch process is used for the parallel data block behind the Waveform shaping being carried out and going here and there conversion;
The waveform synthesis step, be used for and the sequence of blocks of data of string conversion output by the stack that is shifted of the up-sampling rate of prototype filter.
3. launching technique according to claim 2 is characterized in that:
In the described subband mapping step, will be through each data block b of string and conversion kIn each element be mapped to respectively on the corresponding subband and transmit, for the subband transmission 0 that does not have data map, the sequence of blocks of data { b that input is parallel k, k=0,1,2....} is transformed into corresponding data block sequence { c k, k=0,1,2 ..., c kRepresent that also a number of elements is the column vector of M, wherein b kRepresent a column vector, the number of sub-bands K that the size of this vector equals to take; M is the size of IDFT conversion in the IDFT converting means (13).
4. launching technique according to claim 3 is characterized in that:
In the described IDFT shift step, to each parallel symbol data block c of input kCarry out M point IDFT conversion, the IDFT conversion M that counts equals the total number of sub-bands of many Methods of Subband Filter Banks, the sequence of blocks of data { c that input is parallel k, k=0,1,2....} is transformed into corresponding data block sequence { d k, k=0,1,2....}, relation is each other obeyed
Figure FA20192747200610117332301C00011
N=0 ..., M-1, wherein, d kRepresent a number of elements and the same column vector of IDFT transform size M.
5. launching technique according to claim 4 is characterized in that:
In the described phase shift steps, the sequence of blocks of data { d that input is parallel k, k=0,1,2....} is transformed into corresponding data block sequence { e k, k=0,1,2....}, relation is each other obeyed e k(n)=d k(n) exp (j2 π n ξ/M), and n=0 ..., M-1}, ξ be intersubband every normalized frequency offset, wherein, e kRepresent that also a number of elements is the column vector of M, M equals the total number of sub-bands of many Methods of Subband Filter Banks.
6. launching technique according to claim 5 is characterized in that:
In the described data block cascade step, the sequence of blocks of data { e that input is parallel k, k=0,1,2....} is transformed into corresponding parallel data block sequence { g k, k=0,1,2....}, relation is each other obeyed g k(n '+mM)=e k(n ') exp (j2 π m ξ), and n '=0 ..., M-1; M=0 ..., R-1}, M equal the total number of sub-bands of many Methods of Subband Filter Banks, and M * R=L, and L is the prototype filter length of many Methods of Subband Filter Banks correspondence, wherein, g kRepresent that also a number of elements is the column vector of L.
7. launching technique according to claim 6 is characterized in that: when frequency offset ξ be 0.5 intersubband every the time,
g k(n′+mM)＝e k(n′)(-1) m。
8. launching technique according to claim 6 is characterized in that:
In the described Waveform shaping step, the sequence of blocks of data { g that input is parallel k,=0,1,2....} is transformed into corresponding data block sequence { h k, k=0,1,2....}, relation is each other obeyed h k(n)=g k(n) f p(n) { n=0,1,2..., L-1; K=0,1,2 ..., { f wherein p(n), n=0,1,2 ..., L-1} is the prototype filter coefficient of many Methods of Subband Filter Banks correspondence, described prototype filter satisfies the shift-orthogonal condition:
Figure FA20192747200610117332301C00021
Wherein L is a prototype filter length, and N is prototype filter shift-orthogonal interval, h kRepresent the column vector that number of elements is L.
9. launching technique according to claim 8 is characterized in that:
In the described parallel/serial switch process, the serial data block sequence of output is { l k(n), n=0,1,2..., L-1; K=0,1,2 ..., l wherein kBe expressed as the serial data block that block length is L, and
Figure FA20192747200610117332301C00022
N=0,1,2..., L-1.
10. launching technique according to claim 9 is characterized in that:
In the described waveform synthesis step, at k constantly, be that the preceding N point data of the data sequence of L sends with the length that generates in the past, get remaining L-N point data again, after afterbody adds N individual zero,, constitute new data sequence with the k moment and the L point data piece addition of changing output of going here and there; And k+1 constantly will this newly-generated sequence preceding N point data send, get remaining L-N point data again, afterbody add N zero after, with the k+1 also L point data piece addition of string conversion output constantly, constitute the data updated sequence, so go round and begin again, output sequence is S (n), and n=0,1 ... (D-1) * and N+L-1}, D is the multiplexing number of time domain waveform.
11. launching technique according to claim 10 is characterized in that: in the described waveform synthesis step,
Figure FA20192747200610117332301C00024
Here, and s (n), n=0,1 ... (D-1) * and N+L-1}, expression length is the row vector of (D-1) * N+L.
12. a simple receiving system based on many Methods of Subband Filter Banks is characterized in that comprising:
The waveform decomposer is used to finish the corresponding inverse operation of transmitting terminal waveform synthesizer;
Serial/parallel conversion equipment, the sequence of blocks of data that is used for importing from the serial of described waveform decomposer is converted to the parallel data block sequence;
The Waveform Matching device is used for the parallel data block Waveform Matching to serial/parallel conversion back output;
Data block merges device, be used for that the data block through Waveform Matching is divided into L/M section size earlier and be the data block of M then the data block that each M is ordered to be multiplied by phase shift factor respectively, at last with this L/M data block stack, forming length is the data block of M, and wherein L is a prototype filter length;
Phase changer, be used for to data block merge output each parallel time domain symbol data piece M element respectively correspondence be multiplied by the phase shift factor, phase shift factor depends on the sub-bands of frequencies side-play amount;
The DFT converting means is used for the symbol sebolic addressing through phase shift is carried out M point DFT conversion;
The subband solutions mapping device is used for the output signal of described DFT converting means is finished and the opposite inverse operation of transmitting terminal subband mapping device;
Parallel/serial conversion equipment is used for the sequence of blocks of data of described subband solutions mapping device output is carried out parallel/serial conversion operations.
13. a simple method of reseptance based on many Methods of Subband Filter Banks is characterized in that comprising:
The waveform decomposition step is used to finish the corresponding inverse operation of transmitting terminal waveform synthesizer;
Serial/parallel switch process, the sequence of blocks of data that is used for importing from the serial of described waveform decomposer is converted to the parallel data block sequence;
The Waveform Matching step is used for the parallel data block Waveform Matching to serial/parallel conversion back output;
The data block combining step, be used for that the data block through Waveform Matching is divided into L/M section size earlier and be the data block of M then the data block that each M is ordered to be multiplied by phase shift factor respectively, at last with this L/M data block stack, forming length is the data block of M, and wherein L is a prototype filter length;
Phase shift steps, be used for to data block merge output each parallel time domain symbol data piece M element respectively correspondence be multiplied by the phase shift factor, phase shift factor depends on the sub-bands of frequencies side-play amount;
The DFT shift step is used for the symbol sebolic addressing through phase shift is carried out M point DFT conversion;
The subband solutions mapping step is used for the output signal of described DFT converting means is finished and the opposite inverse operation of transmitting terminal subband mapping device;
Parallel/serial switch process is used for the sequence of blocks of data of described subband solutions mapping device output is carried out parallel/serial conversion operations.
14. method of reseptance according to claim 13 is characterized in that:
In the described waveform decomposition step, be used to finish the corresponding inverse operation of transmitting terminal waveform synthesizer (18), suppose the receiver ideal synchronisation, and the serial data sequence that is input to the receiving system of many Methods of Subband Filter Banks can be expressed as { s ' (n), n=0,1 ..., (D-1) * and N+L-1}, then the serial data block sequence of waveform decomposition output is { q k(n), n=0,1,2..., L-1; K=0,1,2 ..., D-1}, relation is each other obeyed q k(n)=s ' (n+kN) { n=0,1,2..., L-1; K=0,1,2 ..., D-1}; Here, q kRepresent that a number of elements is the row vector of L, wherein L is a prototype filter length, and D is the multiplexing number of time domain waveform, and N is prototype filter shift-orthogonal interval.
15. method of reseptance according to claim 14 is characterized in that: in the described serial/parallel switch process, be output as parallel data symbol sebolic addressing { r k(n), n=0,1,2..., L-1; K=0,1,2 ..., D-1}; Here, r kRepresent the column vector that number of elements is L.
16. the method for reseptance based on many Methods of Subband Filter Banks according to claim 15 is characterized in that:
In the described Waveform Matching step, the sequence of blocks of data { r that input is parallel k(n), n=0,1,2..., L-1; K=0,1,2 ..., D-1} is transformed into corresponding data block sequence { t k(n), n=0,1,2..., L-1; K=0,1,2 ..., D-1}, relation is each other obeyed { f wherein p(n), n=0,1,2 ..., L-1} is the prototype filter coefficient of many Methods of Subband Filter Banks correspondence, subscript " * " expression conjugation, t k(n) column vector that number of elements is L of expression.
17. method of reseptance according to claim 16 is characterized in that:
In the described data block combining step, each parallel data block sequence t of input k(n) be transformed into parallel data block { u k(n), n=0,1,2..., M-1; K=0,1,2 ..., D-1}, relation is each other obeyed
Figure FA20192747200610117332301C00042
N=0,1,2 ..., M-1; K=0,1,2 ..., D-1}, wherein, M equals the total number of sub-bands of many Methods of Subband Filter Banks, and L is the prototype filter length of many Methods of Subband Filter Banks correspondence, and ξ is that intersubband is every normalized frequency offset, u kRepresent the column vector that number of elements is M.
18. method of reseptance according to claim 17 is characterized in that:
In the described phase shift steps, the sequence of blocks of data { u that input is parallel k(n), n=0,1,2..., M-1; K=0,1,2 ..., D-1} is transformed into corresponding data block sequence { v k(n), n=0,1,2..., M-1; K=0,1,2 ..., D-1}, relation is each other obeyed v k(n)=u k(n) exp (j2 π n ξ/M), { n=0,1,2..., M-1; K=0,1,2 ..., D-1}, wherein, ξ is that intersubband is every normalized frequency offset, v kRepresent that also a number of elements is the column vector of M, M equals the total number of sub-bands of many Methods of Subband Filter Banks.
19. method of reseptance according to claim 18 is characterized in that:
In the described DFT shift step, the parallel data sequence of input is transformed into the corresponding data block sequence
{ w k(m), m=0,1,2..., M-1; K=0,1,2 ..., D-1}, relation is each other obeyed
Figure FA20192747200610117332301C00043
Wherein, w kRepresent a number of elements and the same column vector of DFT transform size M.
20. method of reseptance according to claim 19 is characterized in that:
In the described subband solutions mapping step, according to the mode of transmitting terminal subband mapping, from data block w through DFT conversion output kThe corresponding K point data of middle taking-up through the subband solutions mapping device, is output as sequence of blocks of data { x k(m '), m '=0,1,2..., K-1; K=0,1,2 ..., D-1}, wherein, x kRepresent the column vector that number of elements is K.
21. method of reseptance according to claim 20 is characterized in that:
In the described parallel/serial switch process, be output as the serial data symbol sebolic addressing:
{y k(m′)，m′＝0，1，2...，K-1；k＝0，1，2，...，D-1}，
And y k(m ')=x k(m '), { m '=0,1,2..., K-1; K=0,1,2 ..., D-1} is used for the symbol demodulation and the channel-decoding of receiving terminal, to recover the information bit of emission.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1463095A (en) * 2002-05-28 2003-12-24 三星电子株式会社 Time-domain synchronous orthogonal frequency-division multiplexing transmitter and its signal processing method

Non-Patent Citations (5)

* Cited by examiner, † Cited by third party
Title
Samsung.Time vs. frequency domain realization of SC-FDMAtransmissions.3GPP TSG RAN WG1 Meeting #42 R1-050881.2005,3(1421050881),1-5.
Samsung.Time vs. frequency domain realization of SC-FDMAtransmissions.3GPP TSG RAN WG1 Meeting #42 R1-050881.2005,3(1421050881),1-5. *
SHRCWC, RITT.GMC Transmission Scheme for Evolved UTRA Uplink.3GPP TSG RAN WG1 #42 R1-050781.2005,3(1421050781),1-7. *
李明齐 张小东 李元杰 周斌.基于DFT扩频的广义多载波频分多址上行链路传输方案 ——DFT-S-GMC.电信科学 6.2006,(6),5-10.
李明齐 张小东 李元杰 周斌.基于DFT扩频的广义多载波频分多址上行链路传输方案 ——DFT-S-GMC.电信科学 6.2006,(6),5-10. *

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