CN103873187B - Deinterleaving method and device in ofdm system - Google Patents
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Abstract
The invention discloses deinterleaving method and device in a kind of ofdm system, the method includes：S1, complex symbol series to be transmitted are divided into real part and imaginary part, i.e., same to phase, orthogonal two-way symbol sebolic addressing；S2, the holding same phase or positive cross-channel symbol sebolic addressing are constant, and another road symbol sebolic addressing is divided into multigroup successively, and every group carries out the interior intertexture of group；S3, the same phase not interweaved in step S2 or positive cross-channel symbol are reassembled into new complex symbol series with another road symbol after interweaving, claim the first complex symbol series；S4, symbol interleaving is carried out to first complex symbol series, obtain the second complex symbol series；S5, OFDM modulation is carried out to second complex symbol series.The present invention improves time, frequency and the signal space diversity gain of ofdm system, maintains throughput and relatively low implementation complexity higher.
Description
Technical field
The present invention relates to digital information transmission technical field, and in particular to one kind can improve OFDM（OFDM）System
The deinterleaving method and device of time, frequency, signal space diversity gain in system.
Background technology
In communication and broadcasting, actual channel generally has certain correlation in time and frequency domain.From time domain
See, the channel time domain shock response of time adjacent segments（CIR）Change is little；From in terms of frequency domain, the channel frequency punching in side frequency
Hit response（CFR）Also it is almost identical；That is, channel has memory characteristic.When this/Memorability of the channel response of frequency domain easily leads
Burst error is caused, the possibility in deep fade is very big simultaneously for immediately/adjacent data of frequency domain, particularly with terrestrial wireless communication
And broadcast system.However, current research obtains more deep, excellent performance channel coding generally directed to discrete memoryless channel(DMC)
Design.In order to obtain the memoryless channel required by channel coding, it is that one kind turns actual channels with memory preferably to interweave
Change the effective means of discrete memoryless channel(DMC) into.Because of this, current communication system block diagram uses following structure substantially：Transmitting terminal
Channel coding is first passed through, is then gone out by interleaved transmission；And receiving terminal is given channel and is translated afterwards then conversely by deinterleaving
Code.Consequently, it is possible to by preferable interleave and deinterleave, can recognize to the equivalent channel before channel decoding after channel coding
To be memoryless.
But the various factors such as interleave depth, time delay, throughput, treatment complexity are limited to, actual intertexture is far from reason
Think.With OFDM（OFDM）As a example by block interleaving in system, it is assumed that the subcarrier number of OFDM is modulated for 4096, OFDM
The block interleaver for constellation symbol before includes 240 rows, 4096 row.Row write row read mode is used during intertexture, during deinterleaving
By the way of row write row reading.It is seen that, after deinterleaving, although 4096 symbols, but this 4096 symbols are included per a line
Number it is only from 256 different sub-carriers.When this 4096 or a portion（More than 256）Symbol gives decoder and enters row decoding
When, the frequency diversity gain exponent number that decoder is obtained is only 256.
On the other hand, signal space diversity（signal space diversity）Technology is by be passed by bidimensional or higher-dimension
Defeated signal is transmitted in different time-frequencies, can further improve diversity gain, referring to J.Boutros and E.Viterbo,
“Signal space diversity:A power-and bandwidth-efficient diversity technique
for the Rayleigh fading channel,”IEEE Trans.Inform.Theory,vol.44,no.4,
pp.1453–1467,July1998.And in order to realize that bidimensional or dimensional signal high are transmitted in different time-frequencies, then need to signal
Dimension is split, interweaved and is recombinated, and its core is to interweave.
In order to obtain the diversity gain bigger than traditional block interleaving, various improved interleavers are proposed out.For example, literary
Offer（Ocean is flat in village, " OFDM dispensing devices and OFDM transmission/receptidevice device and deinterleaving method, " Chinese invention patent, application number
200880100831.9）A kind of method of generating random number is employed to realize interweaving；Or document（Ya Pufandebi
Gram, Blanc Nice pressgang .M. Gregg Popovich, " for the deinterleaving method of OFDM communications, " Chinese invention patent is open
Number CN1742450A）OFDM frequency bands are divided into some sub-bands and are interleaved treatment again.
The content of the invention
（One）The technical problem to be solved
The technical problem to be solved in the present invention is：Design the deinterleaving method and device in a kind of ofdm system so that system
Time, frequency, signal space diversity gain higher is obtained, while keeping data throughput and relatively low realization complexity higher
Degree.
（Two）Technical scheme
To solve the above problems, the invention provides the deinterleaving method in a kind of ofdm system, the method bag
Include following steps：
S1, complex symbol series to be transmitted are divided into real part and imaginary part, i.e., same to phase, orthogonal two-way symbol sebolic addressing；
S2, holding are described constant with phase or positive cross-channel symbol sebolic addressing, and another road symbol sebolic addressing is divided into multigroup successively, every group
Interweave in group；
S3, by the same phase not interweaved in step S2 or orthogonal symbols sequence with interweave after another road symbol sebolic addressing group again
The new complex symbol series of synthesis, claim the first complex symbol series；
S4, symbol interleaving is carried out to first complex symbol series, obtain the second complex symbol series；
S5, OFDM modulation is carried out to second complex symbol series.
Preferably, it is identical per group code number in the step S2, interweave in described group and use identical intertexture pattern.
Preferably, it is even number, i.e. 2m per group code number to make described, then intertexture pattern is [xm, xm+1..., x2m, x1,
x2..., xm-1]；When every group code number is 4, intertexture pattern is [2,4,1,3], and the set of symbols before even order interweaves is
x1, x2, x3, x4, then the set of symbols after interweaving is x2, x4, x1, x3；When it is described be 6 per group code number when, intertexture pattern for [3,
5,6,2,3,1], the set of symbols before even order interweaves is x1, x2, x3, x4, x5, x6, then the set of symbols after interweaving is x3, x5, x6,
x2, x1, x4。
Preferably, the symbol interleaving in the step S4 is using block interleaving or the block interleaving of piecemeal row cyclic shift.
Further, the block interleaving of the piecemeal row cyclic shift is comprised the steps of：
S001, will treat that interleaved sequence x is write in symbol interleaver line by line, obtain the symbol sebolic addressing X of matrix form；
S002, the symbol sebolic addressing X is divided into multiple sub-blocks by row, wherein each sub-block carries out the row of different side-play amounts
Cyclic shift, obtains the symbol sebolic addressing after row cyclic shift
S003, from above-mentioned symbol sebolic addressingIn read symbol by column, the symbol sebolic addressing after being interweaved
Preferably, in the step S002, each sub-block include integer OFDM symbol, each sub-block it is inclined
Move address and obey arithmetic sequence.
Preferably, the step S003 is specially：Down read since offset row, first is read again after reading last column
OK, the previous row of offset row, the symbol sebolic addressing after being interweaved and are read always
Preferably, the row cyclic shift amount f in the step S002sIt is set to the arithmetic progression of s, i.e. fs=δ s,
Wherein δ is positive integer, and 0≤s ＜ S, S are the number of sub-block.
Preferably, in short delivery knits pattern：Symbol interleaver line number is 240, and columns is 4096, when OFDM
When carrier number is 4096, row cyclic shift amount fs=2s, 0≤s ＜ S, wherein S=16 represent sub-block number；Work as orthogonal frequency
When multiplexing sub-carrier number is 8192, fs=4s, 0≤s ＜ S, wherein sub-block number S=8；When OFDM sub-carrier number is
When 32768, fs=8s, 0≤s ＜ S, S=2；
In intertexture pattern long：Symbol interleaver line number is 480, and columns is 4096, when OFDM sub-carrier number
For 4096 when, row cyclic shift amount fs=2s, 0≤s ＜ S, wherein sub-block number S=32；When OFDM subcarrier
When number is 8192, fs=4s, 0≤s ＜ S, S=16；When OFDM sub-carrier number is 32768, fs=8s, 0≤s ＜
S, S=4.
Present invention also offers the interlaced device in a kind of ofdm system, the device includes：
Inphase/orthogonal demultiplexer, for complex symbol series to be transmitted to be divided into same phase, orthogonal two-way symbol sequence
Row；
Single channel symbol sebolic addressing Block Interleaver, is connected with the inphase/orthogonal demultiplexer, for by it is above-mentioned with mutually or
Orthogonal single channel symbol sebolic addressing is divided into multigroup successively, and every group interweave in group；
Signal combiner, is connected with the single channel symbol sebolic addressing Block Interleaver, for by the same phase or orthogonal not interweaved
Symbol sebolic addressing is reassembled into new complex symbol series with another road symbol sebolic addressing after interweaving；
Symbol interleaver, is connected with the signal combiner, for the above-mentioned new complex symbol sequence being reassembled into
Row carry out symbol interleaving.
（Three）Beneficial effect
The present invention improves time, frequency and the signal space diversity gain of ofdm system, maintains higher
Throughput and relatively low implementation complexity.
Brief description of the drawings
Fig. 1 is the flow chart of the inventive method；
Fig. 2 is typical OFDM system transmitter block diagram；
Fig. 3 is the overview flow chart of an embodiment of the present invention；
Fig. 4 is the IQ intertexture flow design sketch of currently preferred one group of 4 symbols；
Fig. 5 is the structure chart of interlaced device of the present invention.
Specific embodiment
With reference to the accompanying drawings and examples, specific embodiment of the invention is described in further detail.Hereinafter implement
Example is not limited to the scope of the present invention for illustrating the present invention.
Fig. 1 is the flow chart of the inventive method, the invention provides the deinterleaving method in a kind of ofdm system,
Its step is as follows：
S1, complex symbol series to be transmitted are divided into real part and imaginary part, i.e., same to phase, orthogonal two-way symbol sebolic addressing；
S2, holding are described constant with phase or positive cross-channel symbol sebolic addressing, and another road symbol sebolic addressing is divided into multigroup successively, every group
Interweave in group；
S3, by the same phase not interweaved in step S2 or orthogonal symbols sequence with interweave after another road symbol sebolic addressing group again
The new complex symbol series of synthesis, claim the first complex symbol series；
S4, symbol interleaving is carried out to first complex symbol series, obtain the second complex symbol series；
S5, OFDM modulation is carried out to second complex symbol series.
Preferably, it is identical per group code number in the step S2, interweave in described group and use identical intertexture pattern.
Preferably, it is even number, i.e. 2m per group code number to make described, then intertexture pattern is [xm, xm+1..., x2m, x1,
x2..., xm-1]；Particularly, when every group code number is 4, intertexture pattern is [2,4,1,3], before even order interweaves
Set of symbols is x1, x2, x3, x4, then the set of symbols after interweaving is x2, x4, x1, x3；When every group code number is 6, intersection chart
Sample is [3,5,6,2,3,1], and the set of symbols before even order interweaves is x1, x2, x3, x4, x5, x6, then the set of symbols after interweaving is x3,
x5, x6, x2, x1, x4。
Preferably, the symbol interleaving in the step S4 is using block interleaving or the block interleaving of piecemeal row cyclic shift.
Further, the block interleaving of the piecemeal row cyclic shift is comprised the steps of：
S001, will treat that interleaved sequence x is write in symbol interleaver line by line, obtain the symbol sebolic addressing X of matrix form；
S002, the symbol sebolic addressing X is divided into multiple sub-blocks by row, wherein each sub-block carries out the row of different side-play amounts
Cyclic shift, obtains the symbol sebolic addressing after row cyclic shift
S003, from above-mentioned symbol sebolic addressingIn read symbol by column, the symbol sebolic addressing after being interweaved
Preferably, in the step S002, each sub-block include integer OFDM symbol, each sub-block it is inclined
Move address and obey arithmetic sequence.
Preferably, the step S003 is specially：Down read since offset row, first is read again after reading last column
OK, the previous row of offset row, the symbol sebolic addressing after being interweaved and are read always
Preferably, the row cyclic shift amount f in the step S002sIt is set to the arithmetic progression of s, i.e. fs=δ s,
Wherein δ is positive integer, and 0≤s ＜ S, S are the number of sub-block.
Preferably, in short delivery knits pattern：Symbol interleaver line number is 240, and columns is 4096, when OFDM
When carrier number is 4096, row cyclic shift amount fs=2s, 0≤s ＜ S, wherein S=16 represent sub-block number；Work as orthogonal frequency
When multiplexing sub-carrier number is 8192, fs=4s, 0≤s ＜ S, wherein sub-block number S=8；When OFDM sub-carrier number is
When 32768, fs=8s, 0≤s ＜ S, S=2；
In intertexture pattern long：Symbol interleaver line number is 480, and columns is 4096, when OFDM sub-carrier number
For 4096 when, row cyclic shift amount fs=2s, 0≤s ＜ S, wherein sub-block number S=32；When OFDM subcarrier
When number is 8192, fs=4s, 0≤s ＜ S, S=16；When OFDM sub-carrier number is 32768, fs=8s, 0≤s ＜
S, S=4.
The present invention is illustrated with specific embodiment below：
As shown in Fig. 2 a typical ofdm system includes：Information bit waiting for transmission is handed over by channel coding, bit
Knit, form symbol stream after constellation mapping, symbol stream by carrying out OFDM modulation after symbol interleaving, then by molding filtration and
Up-conversion is launched.The symbol of symbol interleaving and its receiving terminal is deinterleaved and plays key player in an ofdm system,
It is responsible for for time/frequency block decline in ofdm system being dispersed as random fading, the discrete memoryless for needed for channel coding is created
Condition, increases time/frequency diversity gain.The present invention employs signal space diversity technology simultaneously, with conventional symbols intertexture phase
Than having newly increased constellation mapping Hou I/Q roads Signal separator, having interweaved and reconfigure, the purpose is to further by I/Q roads signal
Break up, increased signal space diversity gain.As shown in figure 3, the overall procedure of an embodiment of the present invention is as follows：
S1, IQ separating step：Complex symbol series to be transmitted are divided into real part and imaginary part, i.e., same to phase（I）, it is orthogonal（Q）Two
Road symbol sebolic addressing；
S2, single channel symbol sebolic addressing block interleaved step：Keep I（Or Q）Road symbol sebolic addressing is constant, by Q（Or I）Road symbol sequence
Leu is divided into some groups, and every group interweave in group；
S3, IQ combining step：The I that will not interweave in step S2（Or Q）Q after road symbol and intertexture（Or I）Road signal weight
The complex symbol series of Combination nova Cheng Xin, claim the first complex symbol series；
S4, complex symbol series interleaving steps：The first complex symbol series of gained in S3 steps are carried out into symbol interleaving, the is obtained
Two complex symbol series；
S5, OFDM modulation is carried out to the second complex symbol series.
Wherein, it is identical per group code number in step S2, interweave in group and use identical intertexture pattern.
Wherein, when every group code number is 4, intertexture pattern is [2,4,1,3], even the I before order intertexture（Or Q）Road symbol
Group is x1, x2, x3, x4, then the set of symbols after interweaving is x2, x4, x1, x3.Fig. 3 shows the effect before and after its IQ intertextures.Constellation reflects
Symbol stream after penetrating is grouped per tetrad, and it is s=(s to make a certain group of signal1, s2, s3, s4), s is separated into I/Q two-way letter
Number, i.e.,WithBy I roads signal keep it is constant, by Q roads signal according to
Pattern [2,4,1,3] is interleaved, and obtainsBy I roads signalAnd friendship
Q roads signal after knittingIt is reassembled intoFor follow-up symbol interleaving.
General, if it is even number that IQ interweaves per group code number, 2m being set to, preferred intertexture pattern is [xm,
xm+1..., x2m, x1, x2..., xm-1]。
Symbol interleaving in step S4 is using block interleaving or the block interleaving of piecemeal row cyclic shift；The piecemeal row circulation
The block interleaving of displacement is comprised the steps of：
S001, line by line write step：Intertexture presequence x is write in symbol interleaver line by line, the symbol of matrix form is obtained
Number sequence X；
The sequence for making incoming symbol interweave is x=(x0, x1..., xM×N-1), write line by line, obtain matrix form X=
{XI, j, wherein XI, jThe element of the i-th rows of representing matrix X jth row, 0≤i ＜ M, 0≤j ＜ N, so that XI, j=xi×N+j；M represents symbol
The line number of number interleaver, N represents the columns of symbol interleaver.
S002, piecemeal row cyclic shift step：X is divided into some sub-blocks by row, each sub-block carries out different side-play amounts
Row cyclic shift, obtain the symbol sebolic addressing after row cyclic shift
Make M and NOFDMLeast common multiple be G, and M × G1=NOFDM×G2=G, wherein G1It is the factor of N, G2For T because
Son and N/G1=T/G2=S, NOFDMRepresent the effective sub-carrier numbers of OFDM；By matrix X by row per G1Row are divided into a submatrix,
A total of S sub- matrix-block, is designated as X=[X(0)..., X(S-1)], wherein X(s)Referred to as sub-block, 0≤s ＜ S；By sub-block X(s)By row
Displacement is circulated, evenIt is that length is G1Row vector, represent X(s)The i-th row, 0≤i ＜ M, X(s)Moved to downlink cycle
Position fsObtainI.e.Wherein j=mod (i+M-fs, M), 0≤i ＜ M,RepresentThe i-th row, mod
(a, b) represents the remainder for taking a moulds b；Obtain the matrix after sub-block cyclic shiftWherein circulate
Shift offsets amount fs, 0≤s ＜ S are to pre-set value.
S003, by column reading step：Successively fromIn read by column, symbol sebolic addressing after being interweaved
By row fromIn successively order read NOFDMIndividual symbol is modulated for OFDM.
Wherein, in step S002, each sub-block includes integer OFDM symbol.
Wherein, generally by side-play amount fsIt is set to the arithmetic progression of s, i.e. fs=δ s, wherein δ are positive integer.
In short delivery knits pattern：Symbol interleaver line number is 240, and columns is 4096, when OFDM sub-carrier number
For 4096 when, row cyclic shift amount fs=2s, 0≤s ＜ S, wherein S=16 represent sub-block number；When OFDM
When carrier number is 8192, fs=4s, 0≤s ＜ S, wherein sub-block number S=8；When OFDM sub-carrier number is 32768,
fs=8s, 0≤s ＜ S, S=2；
In intertexture pattern long：Symbol interleaver line number is 480, and columns is 4096, when OFDM sub-carrier number
For 4096 when, row cyclic shift amount fs=2s, 0≤s ＜ S, wherein sub-block number S=32；When OFDM subcarrier
When number is 8192, fs=4s, 0≤s ＜ S, S=16；When OFDM sub-carrier number is 32768, fs=8s, 0≤s ＜
S, S=4.
Fig. 5 is the structure chart of interlaced device of the present invention, present invention also offers the friendship in a kind of ofdm system
Device is knitted, the device includes：
Inphase/orthogonal demultiplexer, for complex symbol series to be transmitted to be divided into same phase, orthogonal two-way symbol sequence
Row；
Single channel symbol sebolic addressing Block Interleaver, is connected with the inphase/orthogonal demultiplexer, for by it is above-mentioned with mutually or
Orthogonal single channel symbol sebolic addressing is divided into multigroup successively, and every group interweave in group；
Signal combiner, is connected with the single channel symbol sebolic addressing Block Interleaver, for by the same phase or orthogonal not interweaved
Symbol sebolic addressing is reassembled into new complex symbol series with another road symbol sebolic addressing after interweaving；
Symbol interleaver, is connected with the signal combiner, for the above-mentioned new complex symbol sequence being reassembled into
Row carry out symbol interleaving.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, on the premise of the technology of the present invention principle is not departed from, some improvement and replacement can also be made, these improve and replace
Also should be regarded as protection scope of the present invention.
Claims (8)
1. the deinterleaving method in a kind of ofdm system, it is characterised in that comprise the following steps：
S1, complex symbol series to be transmitted are divided into real part and imaginary part, i.e., same to phase, orthogonal two-way symbol sebolic addressing；
S2, holding are described constant with phase or positive cross-channel symbol sebolic addressing, and another road symbol sebolic addressing is divided into multigroup successively, and every group is carried out
Interweave in group；
S3, the same phase not interweaved in step S2 or orthogonal symbols sequence are reassembled into another road symbol sebolic addressing after interweaving
New complex symbol series, claim the first complex symbol series；
S4, symbol interleaving is carried out to first complex symbol series, obtain the second complex symbol series；
S5, OFDM modulation is carried out to second complex symbol series；
Symbol interleaving in the step S4 uses the block interleaving of piecemeal row cyclic shift；
The block interleaving of the piecemeal row cyclic shift is comprised the steps of：
S001, will treat that interleaved sequence x is write in symbol interleaver line by line, obtain the symbol sebolic addressing X of matrix form；
S002, the symbol sebolic addressing X is divided into multiple sub-blocks by row, wherein each sub-block carries out the row circulation of different side-play amounts
Displacement, obtains the symbol sebolic addressing after row cyclic shift
S003, from above-mentioned symbol sebolic addressingIn read symbol by column, the symbol sebolic addressing after being interweaved
2. the method for claim 1, it is characterised in that identical per group code number in the step S2, in described group
Interweave and use identical intertexture pattern.
3. method as claimed in claim 2, it is characterised in that it is even number, i.e. 2m per group code number to make described, then intersection chart
Sample is [xm, xm+1..., x2m, x1, x2..., xm-1]；When every group code number is 4, intertexture pattern is [2,4,1,3], i.e.,
If the set of symbols before order interweaves is x1, x2, x3, x4, then the set of symbols after interweaving is x2, x4, x1, x3；When described per group code number
For 6 when, intertexture pattern be [3,5,6,2,3,1], even order interweave before set of symbols be x1, x2, x3, x4, x5, x6, then after interweaving
Set of symbols be x3,x5,x6,x2,x3,x1。
4. the method for claim 1, it is characterised in that in the step S002, each sub-block is orthogonal comprising integer
Frequency division multiplexing symbol, the offset address of each sub-block obeys arithmetic sequence.
5. the method for claim 1, it is characterised in that the step S003 is specially：Down read since offset row,
The first row is read again after reading last column, and reads the previous row of offset row always, the symbol sebolic addressing after being interweaved
6. the method for claim 1, it is characterised in that the row cyclic shift amount f in the step S002sSet
It is the arithmetic progression of s, i.e. fs=δ s, wherein δ are positive integer, and 0≤s≤S, S are the number of sub-block.
7. method as claimed in claim 6, it is characterised in that in short delivery knits pattern：Symbol interleaver line number is 240, row
Number is 4096, when OFDM sub-carrier number is 4096, row cyclic shift amount fs=2s, 0≤s ＜ S, wherein S
=16 represent sub-block number；When OFDM sub-carrier number is 8192, fs=4s, 0≤s ＜ S, wherein sub-block number S=8；
When OFDM sub-carrier number is 32768, fs=8s, 0≤s ＜ S, S=2；
In intertexture pattern long：Symbol interleaver line number is 480, and columns is 4096, when OFDM sub-carrier number is
When 4096, row cyclic shift amount fs=2s, 0≤s ＜ S, wherein sub-block number S=32；When OFDM sub-carrier number
For 8192 when, fs=4s, 0≤s ＜ S, S=16；When OFDM sub-carrier number is 32768, fs=8s, 0≤s ＜ S, S
=4.
8. the interlaced device in a kind of ofdm system, it is characterised in that the device includes：
Inphase/orthogonal demultiplexer, for complex symbol series to be transmitted to be divided into same phase, orthogonal two-way symbol sebolic addressing；
Single channel symbol sebolic addressing Block Interleaver, is connected with the inphase/orthogonal demultiplexer, for will it is above-mentioned with mutually or it is orthogonal
Single channel symbol sebolic addressing is divided into multigroup successively, and every group interweave in group；
Signal combiner, is connected with the single channel symbol sebolic addressing Block Interleaver, for by the same phase or orthogonal symbols that do not interweave
Sequence is reassembled into new complex symbol series with another road symbol sebolic addressing after interweaving；
Symbol interleaver, is connected with the signal combiner, for entering to the above-mentioned new complex symbol series being reassembled into
Row symbol interleaving；
The symbol interleaving uses the block interleaving of piecemeal row cyclic shift；
The block interleaving of the piecemeal row cyclic shift is comprised the steps of：
S001, will treat that interleaved sequence x is write in symbol interleaver line by line, obtain the symbol sebolic addressing X of matrix form；
S002, the symbol sebolic addressing X is divided into multiple sub-blocks by row, wherein each sub-block carries out the row circulation of different side-play amounts
Displacement, obtains the symbol sebolic addressing after row cyclic shift
S003, from above-mentioned symbol sebolic addressingIn read symbol by column, the symbol sebolic addressing after being interweaved
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| GB2532233A (en) | 2014-11-12 | 2016-05-18 | Sony Corp | Transmitter and receiver and methods of transmitting and receiving |
| FR3032321A1 (en) * | 2015-01-30 | 2016-08-05 | Orange | METHOD AND DEVICE FOR MODULATING COMPLEX SYMBOLS, DEMODULATION METHOD AND DEVICE AND CORRESPONDING COMPUTER PROGRAMS. |
| GB2540594A (en) | 2015-07-22 | 2017-01-25 | Sony Corp | Receiver and method of receiving |
| GB2540595A (en) | 2015-07-22 | 2017-01-25 | Sony Corp | Receiver and method of receiving |
| GB2540593A (en) | 2015-07-22 | 2017-01-25 | Sony Corp | Receiver and method of receiving |
| WO2018114325A1 (en) | 2016-12-23 | 2018-06-28 | Sony Corporation | Transmitter, receiver and methods |
| CN109391366A (en) * | 2017-08-11 | 2019-02-26 | 电信科学技术研究院 | The method and interleaver that a kind of pair of data are interleaved |
| CN112910473B (en) * | 2019-12-04 | 2024-01-26 | 中国科学院上海高等研究院 | Block interleaving method and system based on cyclic shift |
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