CN102263757B - Anti-fading mobile signal transmission method for digital broadcast single-frequency network - Google Patents
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Abstract
The invention discloses an anti-fading mobile signal transmission method for a digital broadcast single-frequency network. The method is a time domain/frequency domain/space domain combined transmission scheme. The anti-fading mobile signal transmission method has the advantages of low peak-to-average power ratio, short synchronization time, anti-fading performance, multi-service controllability and the like.
Description
Technical field
The invention belongs to moving communicating field, relate more specifically to a kind of anti-fading mobile signal transmission method for digital broadcast single-frequency network.
Background technology
The peak-to-average power ratio (PAPR) that OFDM (OFDM) signal is higher has very high requirement to the range of linearity of amplifier and digital to analog converter, the solution that must consider how to reduce the probability of occurrence of large peak power signal in ofdm signal and reduce nonlinear distortion impact.Cascade different coding form can make full use of different coding technological merit; Between coding and code element modulation, insert bit interleaver, can so that coding and modulated process is relatively independent and from different multi-system symbolic numbers, expand diversity order to different binary bits number, thereby the bit error performance that diversity order is improved significantly and has had under multidiameter fading channel.The networking model of employing single frequency network can improve the availability of frequency spectrum of Digital Television digital broadcasting mobile transmission system greatly.In actual single frequency network communication environment, Digital Television digital broadcasting performance of mobile communication system is subject to the impact of the factors such as lock in time, clock jitter, channel fading, channel disturbance.The anti-fading movable signal transmitter of digital broadcast single-frequency network transmission method is the key technology that realizes reliable digit Television Digital broadcast single frequency network Mobile Transmission.
Utilizing Digital Television digital broadcast single-frequency network mobile transmission system to provide free television broadcasting, paid television broadcasting, Secret Information Transmission, multimedia value-added service etc. can control multi-service is the embodiment that new-generation digital Television Digital broadcast mobile transmission system satisfies social needs.
Based on above background, the present invention is directed to practical communication environment and propose a kind of anti-fading mobile signal transmission method for digital broadcast single-frequency network just, can meet the needs that High Data Rate can be controlled multi-service Digital Television digital broadcast single-frequency network Mobile Transmission.
Wish is done more deep understanding to patent background can be with reference to following documents and materials:
R.V.Nee，R.Prasad.“OFDM?for?wirelessmultimedia?communications”.Boston：Artech?House，2000.
Y.Wu，S.Hirakawa，U.H.Reimers，and?J.Whitaker.“Overview?of?digital?television?development，”Proceedings?of?the?IEEE，Special?Issue?on?Global?Digital?Television：Technology?and?Emerging?Services，pp.8-21，Jan.2006.
U.Ladebusch?and?C.A.Liss.“Terrestrial?DVB(DVB-T)：A?broadcast?technology?for?stationary?portable?and?mobile?use，”Proceedings?of?the?IEEE，Special?Issue?on?Global?Digital?Television：Technology?and?Emerging?Services，pp.183-194，Jan.2006.
M.Takada?and?M.Saito.“Transmission?systems?for?ISDB-T，”Proceedings?of?the?IEEE，Special?Issueon?Global?Digital?Television?：Technology?and?Emerging?Services，pp.251-256，Jan.2006.
S.Benedetto，D.Divsalar，G.Montorsi，and?F.Pollara，“Serial?concatenation?of?interleaved?codes：performance?analysis，design，and?iterative?decoding，”IEEE?Trans.Inform.Theory，vol.44，no.3，pp.909-925，May?1998.
Summary of the invention
The present invention is directed to High Data Rate and can control multi-service Digital Television digital broadcast single-frequency network Mobile Transmission problem, proposed a kind of anti-fading mobile signal transmission method for digital broadcast single-frequency network.
A kind of anti-fading mobile signal transmission method for digital broadcast single-frequency network that the present invention proposes, is characterized in that it comprises the following steps:
1) the centre data manager of single frequency network converts the multi-medium data media data processor of flowing through to bit stream, and the scrambler sequence of utilizing feedback shift register to produce is carried out scrambling processing to form input data bit flow;
2) the network data management device of single frequency network is by the input data bit RS coding (Reed-Solomon that flows through, RS), convolutional interleave, LDPC (the Low Density Parity Check that encodes, LDPC), code element modulation forms the cascade interweaved coding modulation data piece of FFT with code element rotation, symbol interleave on frequency domain, FFT represents fast discrete Fourier conversion, and the length of the cascade interweaved coding modulation data piece of FFT is K;
3) the network data management device of single frequency network adopts the space-frequency coding device that code check is 1 that the cascade interweaved coding modulation data piece of the FFT forming on frequency domain is modulated in the anti-fading movable signal transmitter branches of each digital broadcasting in single frequency network and forms the cascade interweaved coding modulation data piece of empty frequency modulation FFT processed, and the time synchronized of adjusting the anti-fading movable signal transmitter branches of each digital broadcasting is all processed the cascade interweaved coding modulation data piece of empty frequency modulation FFT processed at one time with all transmitters in assurance network;
4) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network adopts IFFT that the cascade interweaved coding modulation data piece of empty frequency modulation FFT processed is transformed to the cascade interweaved coding modulation data sample value of sky frequency modulation time domain discrete processed piece D
total, IFFT represents fast discrete Fourier inverse transformation;
5) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network is divided equally into two by the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed piece in order, the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed sub-block D
1with the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed sub-block D
2, D
total=[D
1, D
2];
6) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network passes through peak-to-average power ratio adjustment unit to the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed sub-block D
1, the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed sub-block D
2carry out that signal adds, subtracts, conjugate operation is processed and the synthetic new cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed piece D again
new, the new cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed piece D
newadopt following generate pattern to obtain, generate pattern 1 is D
new=[D
1, D
2], generate pattern 2 is
Generate pattern 3 is
Generate pattern 4 is
Generate pattern 5 is
Generate pattern 6 is
Generate pattern 7 is D
new=[D
* 1, D
2], generate pattern 8 is
Generate pattern 9 is
Generate pattern 10 is
Generate pattern 11 is
Generate pattern 12 is
Compare the synthetic cascade interweaved coding modulation data sample value of the empty frequency modulation time domain discrete processed piece D of 12 kinds of generate patterns
new, choose wherein there is minimum peak-to-average power ratio the cascade interweaved coding modulation data sample value of the empty frequency modulation time domain discrete processed of peak-to-average power ratio piece falls
and the cascade interweaved coding modulation data sample value of the empty frequency modulation time domain discrete processed of peak-to-average power ratio piece will fall
the corresponding generate pattern information adopting send to operational indicator sequence setting unit, wherein, D
* 1expression is to the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed sub-block D
1the cascade interweaved coding modulation data sample value of each sky frequency modulation time domain discrete processed carry out conjugate operation processing and the cascade interweaved coding modulation data sample value of the empty frequency modulation time domain discrete processed sub-block that obtains;
7) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network inserts using Cyclic Prefix as protection interval and falls the cascade interweaved coding modulation data sample value of the empty frequency modulation time domain discrete processed of peak-to-average power ratio piece, the discrete cascade interweaving encoding of the empty frequency modulation time domain cyclic prefix processed of peak-to-average power ratio modulating data sample value piece falls in formation, as frame, the length of Cyclic Prefix is C, and the length of falling the discrete cascade interweaving encoding of the empty frequency modulation time domain cyclic prefix processed of peak-to-average power ratio modulating data sample value piece is C+K;
8) the real part sequence of the anti-fading movable signal transmitter of each digital broadcasting in single frequency network using training sequence as sequence of plural training, the imaginary part sequence using the set operational indicator sequence of operational indicator sequence setting unit as sequence of plural training, in time domain, form the discrete sample block of sequence of plural training, the length of the discrete sample block of training sequence, operational indicator sequence, sequence of plural training is all X, and operational indicator sequence is comprising and unique each system parameters and business model information of expressing the anti-fading movable signal transmitter of digital broadcasting;
9) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network repeats the sequence of plural training discrete sample block forming in time domain continuously to form time domain repetition training series of discrete sample value piece for 2 times in time domain, as frame head;
10) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network is that frame head is inserted into that to fall the discrete cascade interweaving encoding of the empty frequency modulation time domain cyclic prefix processed of peak-to-average power ratio modulating data sample value piece be frame by time domain repetition training series of discrete sample value piece, to form signal frame;
11) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network adopts square root raised cosine filter to be shaped to the signal pulse of signal frame;
12) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network forms emission of radio frequency signals to on-air radio channel by baseband signal up-conversion to carrier wave;
13) radiofrequency signal that the anti-fading movable signal transmitter of each digital broadcasting in the anti-fading movable signal receiver detection of the digital broadcasting in single frequency network reception single frequency network sends also forms baseband signal by its down-conversion, utilizes the Cyclic Prefix characteristic of signal frame and the architectural characteristic of signal frame to carry out baseband signal reception & disposal.
Anti-fading mobile signal transmission method for digital broadcast single-frequency network according to above-mentioned, is characterized in that: the anti-fading movable signal transmitter of each digital broadcasting in single frequency network fall that the signal that the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed of peak-to-average power ratio piece undertakies by specific 12 kinds of generate patterns by the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed sub-block adds, subtracts, conjugate operation processing and again synthesizing; In the signal frame of the anti-fading movable signal transmitter of each digital broadcasting in single frequency network, there is periodic time domain repetition training series of discrete sample value piece; The length X of the training sequence of the anti-fading movable signal transmitter of each digital broadcasting in single frequency network is in 512,1024,2048, the length K of the corresponding cascade interweaved coding modulation data piece of empty frequency modulation FFT processed is respectively 2048,4096,8192, the frequency interval of corresponding subcarrier is respectively 4KHz, 2KHz, 1KHz, and corresponding circulating prefix-length C is respectively 1/4,1/8,1/16 of the cascade interweaved coding modulation data block length of sky frequency modulation FFT processed K size; The training sequence of the anti-fading movable signal transmitter of each digital broadcasting in single frequency network, operational indicator sequence form by a series of 1 or-1, have pseudo-random characteristics; Training sequence, the operational indicator sequence of the anti-fading movable signal transmitter of each digital broadcasting in single frequency network have orthogonality each other; Each different operational indicator sequence of the anti-fading movable signal transmitter of each digital broadcasting in single frequency network is comprising and unique each system parameters and business model information of expressing the anti-fading movable signal transmitter of each digital broadcasting in single frequency network; The code check of space-frequency coding device is 1; The encoding rate of LDPC coding is in 1/4,1/2,5/8,3/4 and 7/8; Code element is modulated to a kind of in QPSK, 16QAM, 64QAM and 256QAM, and symbol constellations figure mapping mode adopts Gray code mapping; Code element rotation is by rotating to an angle and realize symbol constellations figure, the symbol constellations figure anglec of rotation of QPSK is 22.5 degree, the symbol constellations figure anglec of rotation of 16QAM is 11.25 degree, the symbol constellations figure anglec of rotation of 64QAM is 5.626 degree, and the symbol constellations figure anglec of rotation of 256QAM is 2.8125 degree; Symbol interleave adopts random interleaving mode.The anti-fading movable signal receiver of digital broadcasting in single frequency network can make full use of the Cyclic Prefix characteristic of signal frame and the architectural characteristic of signal frame is carried out baseband signal reception & disposal, comprising the time domain and frequency domain combined alternate analysis to signal frame head and signal frame body, processes.
Feature of the present invention:
The present invention is the transmission plan that mix in a kind of time-domain and frequency-domain spatial domain.Of the present invention fall the generate pattern of the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed of peak-to-average power ratio piece and there is minimum peak-to-average power ratio the cascade interweaved coding modulation data sample value of peak-to-average power ratio sky frequency modulation time domain discrete processed piece choosing method falls, but the very high large peak power signal probability of the maximum peak power that not only can make full use of ofdm signal is very low, the real part of the ofdm signal when number of sub carrier wave is larger (or imaginary part) is the characteristic of multiple Gaussian random process and whose amplitude obeys Rayleigh distribution, the amount of information of the required extra transmission of generate pattern adopting is little, be easy to process at receiver end the primary signal of recovering to obtain ofdm signal, the orthogonal property that can not destroy sub-carrier signal simultaneously can not produce extra nonlinear distortion yet.In the signal frame of the anti-fading movable signal transmitter of each digital broadcasting in single frequency network, there is periodic time domain repetition training series of discrete sample value piece, the training sequence of the anti-fading movable signal transmitter of each digital broadcasting in single frequency network, operational indicator sequence has pseudo-random characteristics, the training sequence of the anti-fading movable signal transmitter of each digital broadcasting in single frequency network, operational indicator sequence has orthogonality each other, the signal frame of the anti-fading movable signal transmitter of each digital broadcasting in single frequency network is that frame head is inserted into that to fall the discrete cascade interweaving encoding of the empty frequency modulation time domain cyclic prefix processed of peak-to-average power ratio modulating data sample value piece be frame and forming by time domain repetition training series of discrete sample value piece, these have guaranteed that the anti-fading movable signal receiver of digital broadcasting can realize frame synchronization fast and accurately, Frequency Synchronization, time synchronized, channel transfer characteristic is estimated, and phase noise and channel transfer characteristic are reliably followed the tracks of.Using Cyclic Prefix as protection interval, insert and fall the cascade interweaved coding modulation data sample value of the empty frequency modulation time domain discrete processed of peak-to-average power ratio piece to form signal frame body, can reduce the interference effect between the cascade interweaved coding modulation data of signal frame head and frame.Input data are carried out to cascade interweaved coded modulation and improved diversity order, the bit error performance that communication system has been had under multidiameter fading channel.Code element modulation rotates with code element the diversity that mobile digital broadcast signal is provided.Each different operational indicator sequence of the anti-fading movable signal transmitter of each digital broadcasting in single frequency network is comprising and unique each system parameters and business model information of expressing the anti-fading movable signal transmitter of each digital broadcasting in single frequency network, can, so that Digital Television digital broadcast single-frequency network mobile transmission system can provide free television broadcasting, paid television broadcasting, Secret Information Transmission, multimedia value-added service etc. can control multi-service, satisfy social needs.Transmission method of the present invention has low peak-to-average power ratio, lock in time is short, clock jitter is little, anti-channel fading, anti-channel disturbance, can provide High Data Rate can control the plurality of advantages such as multi-service Digital Television digital broadcast single-frequency network Mobile Transmission.
Accompanying drawing explanation
Fig. 1 is according to the embodiment schematic diagram of signal transmission between the transmitter and receiver of anti-fading mobile signal transmission method for digital broadcast single-frequency network of the present invention.
Fig. 2 is the embodiment schematic diagram forming according to signal frame in signals transmission between the transmitter and receiver of anti-fading mobile signal transmission method for digital broadcast single-frequency network of the present invention.
Embodiment
Below in conjunction with accompanying drawing, specific embodiments of the invention are described in detail.
The embodiment of signal transmission between the transmitter and receiver of the anti-fading mobile signal transmission method for digital broadcast single-frequency network proposing according to the present invention (suppose in single frequency network have N transmitter), as shown in Figure 1, follows these steps to carry out:
1) the centre data manager of single frequency network converts the multi-medium data media data processor of flowing through to bit stream, and the scrambler sequence of utilizing feedback shift register to produce is carried out scrambling processing to form input data bit flow;
2) the network data management device of single frequency network forms the cascade interweaved coding modulation data piece of FFT by flow through RS coding, convolutional interleave, LDPC coding, the code element modulation of input data bit with code element rotation, symbol interleave on frequency domain, FFT represents fast discrete Fourier conversion, and the length of the cascade interweaved coding modulation data piece of FFT is K; The encoding rate of LDPC coding is in 1/4,1/2,5/8,3/4 and 7/8; Code element is modulated to a kind of in QPSK, 16QAM, 64QAM and 256QAM, and symbol constellations figure mapping mode adopts Gray code mapping; Code element rotation is by rotating to an angle and realize symbol constellations figure, the symbol constellations figure anglec of rotation of QPSK is 22.5 degree, the symbol constellations figure anglec of rotation of 16QAM is 11.25 degree, the symbol constellations figure anglec of rotation of 64QAM is 5.626 degree, and the symbol constellations figure anglec of rotation of 256QAM is 2.8125 degree; Symbol interleave adopts random interleaving mode;
3) the network data management device of single frequency network adopts the space-frequency coding device that code check is 1 that the cascade interweaved coding modulation data piece of the FFT forming on frequency domain is modulated in the anti-fading movable signal transmitter branches of each digital broadcasting in single frequency network and forms the cascade interweaved coding modulation data piece of empty frequency modulation FFT processed, and the time synchronized of adjusting the anti-fading movable signal transmitter branches of each digital broadcasting is all processed the cascade interweaved coding modulation data piece of empty frequency modulation FFT processed at one time with all transmitters in assurance network;
4) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network adopts IFFT that the cascade interweaved coding modulation data piece of empty frequency modulation FFT processed is transformed to the cascade interweaved coding modulation data sample value of sky frequency modulation time domain discrete processed piece D
total, IFFT represents fast discrete Fourier inverse transformation;
5) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network is divided equally into two by the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed piece in order, the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed sub-block D
1with the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed sub-block D
2, D
total=[D
1, D
2];
6) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network passes through peak-to-average power ratio adjustment unit to the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed sub-block D
1, the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed sub-block D
2carry out that signal adds, subtracts, conjugate operation is processed and the synthetic new cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed piece D again
new, the new cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed piece D
newadopt following generate pattern to obtain, generate pattern 1 is D
new=[D
1, D
2], generate pattern 2 is
Generate pattern 3 is
Generate pattern 4 is
Generate pattern 5 is
Generate pattern 6 is
Generate pattern 7 is D
new=[D
* 1, D
2], generate pattern 8 is
Generate pattern 9 is
Generate pattern 10 is
Generate pattern 11 is
Generate pattern 12 is
Compare the synthetic cascade interweaved coding modulation data sample value of the empty frequency modulation time domain discrete processed piece D of 12 kinds of generate patterns
new, choose wherein there is minimum peak-to-average power ratio the cascade interweaved coding modulation data sample value of the empty frequency modulation time domain discrete processed of peak-to-average power ratio piece falls
and the cascade interweaved coding modulation data sample value of the empty frequency modulation time domain discrete processed of peak-to-average power ratio piece will fall
the corresponding generate pattern information adopting send to operational indicator sequence setting unit, wherein, D
* 1expression is to the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed sub-block D
1the cascade interweaved coding modulation data sample value of each sky frequency modulation time domain discrete processed carry out conjugate operation processing and the cascade interweaved coding modulation data sample value of the empty frequency modulation time domain discrete processed sub-block that obtains;
7) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network inserts using Cyclic Prefix as protection interval and falls the cascade interweaved coding modulation data sample value of the empty frequency modulation time domain discrete processed of peak-to-average power ratio piece, the discrete cascade interweaving encoding of the empty frequency modulation time domain cyclic prefix processed of peak-to-average power ratio modulating data sample value piece falls in formation, as frame, the length of Cyclic Prefix is C, and the length of falling the discrete cascade interweaving encoding of the empty frequency modulation time domain cyclic prefix processed of peak-to-average power ratio modulating data sample value piece is C+K;
8) the real part sequence of the anti-fading movable signal transmitter of each digital broadcasting in single frequency network using training sequence as sequence of plural training, the imaginary part sequence using the set operational indicator sequence of operational indicator sequence setting unit as sequence of plural training, in time domain, form the discrete sample block of sequence of plural training, the length of the discrete sample block of training sequence, operational indicator sequence, sequence of plural training is all X, and operational indicator sequence is comprising and unique each system parameters and business model information of expressing the anti-fading movable signal transmitter of digital broadcasting; X gets in 512,1024,2048; When X gets 512, K gets 2048, C and gets 1/4 of K size, and the frequency interval of the cascade interweaved coding modulation data piece of empty frequency modulation FFT processed subcarrier is got 4KHz; When X gets 1024, K gets 4096, C and gets 1/8 of K size, and the frequency interval of the cascade interweaved coding modulation data piece of empty frequency modulation FFT processed subcarrier is got 2KHz; When X gets 2048, K gets 8192, C and gets 1/16 of K size, and the frequency interval of the cascade interweaved coding modulation data piece of empty frequency modulation FFT processed subcarrier is got 1KHz;
9) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network repeats the sequence of plural training discrete sample block forming in time domain continuously to form time domain repetition training series of discrete sample value piece for 2 times in time domain, as frame head;
10) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network is that frame head is inserted into that to fall the discrete cascade interweaving encoding of the empty frequency modulation time domain cyclic prefix processed of peak-to-average power ratio modulating data sample value piece be frame by time domain repetition training series of discrete sample value piece, to form signal frame;
11) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network adopts square root raised cosine filter to be shaped to the signal pulse of signal frame;
12) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network forms emission of radio frequency signals to on-air radio channel by baseband signal up-conversion to carrier wave;
13) radiofrequency signal that the anti-fading movable signal transmitter of each digital broadcasting in the anti-fading movable signal receiver detection of the digital broadcasting in single frequency network reception single frequency network sends also forms baseband signal by its down-conversion, utilizes the Cyclic Prefix characteristic of signal frame and the architectural characteristic of signal frame to carry out baseband signal reception & disposal.
According to signal frame in signals transmission between the transmitter and receiver of anti-fading mobile signal transmission method for digital broadcast single-frequency network of the present invention, form the embodiment of (suppose in single frequency network have N transmitter), as shown in Figure 2,
Specifically be implemented as follows:
The centre data manager of single frequency network converts the multi-medium data media data processor of flowing through to bit stream, and the scrambler sequence of utilizing feedback shift register to produce is carried out scrambling processing to form input data bit flow.
The network data management device of single frequency network forms the cascade interweaved coding modulation data piece of FFT by flow through RS coding, convolutional interleave, LDPC coding, the code element modulation of input data bit with code element rotation, symbol interleave on frequency domain; The encoding rate of LDPC coding is in 1/4,1/2,5/8,3/4 and 7/8; Code element is modulated to a kind of in QPSK, 16 QAM, 64QAM and 256QAM, and symbol constellations figure mapping mode adopts Gray code mapping; Code element rotation is by rotating to an angle and realize symbol constellations figure, the symbol constellations figure anglec of rotation of QPSK is 22.5 degree, the symbol constellations figure anglec of rotation of 16QAM is 11.25 degree, the symbol constellations figure anglec of rotation of 64QAM is 5.626 degree, and the symbol constellations figure anglec of rotation of 256QAM is 2.8125 degree; Symbol interleave adopts random interleaving mode; Adopt the space-frequency coding device that code check is 1 that the cascade interweaved coding modulation data piece of the FFT forming on frequency domain is modulated in the anti-fading movable signal transmitter branches of each digital broadcasting in single frequency network and forms the cascade interweaved coding modulation data piece of empty frequency modulation FFT processed, and the time synchronized of adjusting the anti-fading movable signal transmitter branches of each digital broadcasting is all processed at one time to the cascade interweaved coding modulation data piece of empty frequency modulation FFT processed with all transmitters in assurance network; Through IFFT, be transformed to the cascade interweaved coding modulation data sample value of sky frequency modulation time domain discrete processed piece again, by peak-to-average power ratio adjustment unit, generate and choose the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed of the peak-to-average power ratio piece that falls wherein with minimum peak-to-average power ratio and the generate pattern information of institute's correspondence employing is sent to operational indicator sequence setting unit simultaneously.
The anti-fading movable signal transmitter of each digital broadcasting in single frequency network inserts Cyclic Prefix to fall the cascade interweaved coding modulation data sample value of peak-to-average power ratio time domain discrete piece as protection interval; the discrete cascade interweaving encoding of peak-to-average power ratio time domain cyclic prefix modulating data sample value piece falls in formation; as frame, the length of Cyclic Prefix is C.The real part sequence of the anti-fading movable signal transmitter of each digital broadcasting in single frequency network using training sequence as sequence of plural training, the imaginary part sequence using the set operational indicator sequence of operational indicator sequence setting unit as sequence of plural training, in time domain, form the discrete sample block of sequence of plural training, the length of the discrete sample block of training sequence, operational indicator sequence, sequence of plural training is all X, and operational indicator sequence is comprising and unique each system parameters and business model information of expressing the anti-fading movable signal transmitter of digital broadcasting.The anti-fading movable signal transmitter of each digital broadcasting in single frequency network repeats the discrete sample block of the sequence of plural training forming in time domain continuously to form time domain repetition training series of discrete sample value piece for 2 times in time domain, as frame head.The anti-fading movable signal transmitter of each digital broadcasting in single frequency network is that frame head is inserted into that to fall the discrete cascade interweaving encoding of peak-to-average power ratio time domain cyclic prefix modulating data sample value piece be frame by time domain repetition training series of discrete sample value piece, to form signal frame.The anti-fading movable signal transmitter of each digital broadcasting in single frequency network adopts square root raised cosine filter to be shaped to the signal pulse of signal frame.The anti-fading movable signal transmitter of each digital broadcasting in single frequency network by baseband signal up-conversion to carrier wave.
The X of the anti-fading movable signal transmitter of each digital broadcasting in single frequency network gets in 512,1024,2048; When X gets 512, K gets 2048, C and gets 1/4 of K size, and the frequency interval of the cascade interweaved coding modulation data piece of empty frequency modulation FFT processed subcarrier is got 4KHz; When X gets 1024, K gets 4096, C and gets 1/8 of K size, and the frequency interval of the cascade interweaved coding modulation data piece of empty frequency modulation FFT processed subcarrier is got 2KHz; When X gets 2048, K gets 8192, C and gets 1/16 of K size, and the frequency interval of the cascade interweaved coding modulation data piece of empty frequency modulation FFT processed subcarrier is got 1KHz; Training sequence, operational indicator sequence as the anti-fading movable signal transmitter of each digital broadcasting in single frequency network form by a series of 1 or-1, have pseudo-random characteristics, and training sequence, operational indicator sequence have orthogonality each other; The training sequence that meets above-mentioned feature can and be realized as walsh sequence, the Hadamard sequences of orthogonal sequence or the orthogonal sequence being produced by other modes by one group of Phase shift m sequence of a kind of specific type as pseudo-random number sequence.Each different operational indicator sequence is comprising and unique each system parameters and business model information of expressing the anti-fading movable signal transmitter of each digital broadcasting in single frequency network.When X gets 512, the corresponding rolloff-factor that the signal of signal frame is carried out to the square root raised cosine filter of pulse shaping gets 0.1; When X gets 1024, the corresponding rolloff-factor that the signal of signal frame is carried out to the square root raised cosine filter of pulse shaping gets 0.05; When X gets 2048, the corresponding rolloff-factor that the signal of signal frame is carried out to the square root raised cosine filter of pulse shaping gets 0.025.
The anti-fading movable signal transmitter of each digital broadcasting in single frequency network forms emission of radio frequency signals to on-air radio channel by baseband signal up-conversion to carrier wave.
The radiofrequency signal that the anti-fading movable signal transmitter of each digital broadcasting in the anti-fading movable signal receiver detection of digital broadcasting reception single frequency network in single frequency network sends also forms baseband signal by its down-conversion, utilize the Cyclic Prefix characteristic of signal frame and the architectural characteristic of signal frame to carry out baseband signal reception & disposal, comprising the time domain and frequency domain combined alternate analysis to signal frame head and signal frame body, process.
By reference to the accompanying drawings specific embodiments of the invention are had been described in detail above, but the present invention is not limited to above-described embodiment, in the spirit and scope situation of claim that does not depart from the application, those skilled in the art can make various modifications or remodeling.
Claims (6)
1. an anti-fading mobile signal transmission method for digital broadcast single-frequency network, is characterized in that it comprises the following steps:
1) the centre data manager of single frequency network converts the multi-medium data media data processor of flowing through to bit stream, and the scrambler sequence of utilizing feedback shift register to produce is carried out scrambling processing to form input data bit flow;
2) the network data management device of single frequency network forms the cascade interweaved coding modulation data piece of FFT by flow through RS coding, convolutional interleave, LDPC coding, the code element modulation of input data bit with code element rotation, symbol interleave on frequency domain, RS represents Reed-Solomon, LDPC represents Low Density Parity Check, and the length of the cascade interweaved coding modulation data piece of FFT is K;
3) the network data management device of single frequency network adopts the space-frequency coding device that code check is 1 that the cascade interweaved coding modulation data piece of the FFT forming on frequency domain is modulated in the anti-fading movable signal transmitter branches of each digital broadcasting in single frequency network and forms the cascade interweaved coding modulation data piece of empty frequency modulation FFT processed, and the time synchronized of adjusting the anti-fading movable signal transmitter branches of each digital broadcasting is all processed the cascade interweaved coding modulation data piece of empty frequency modulation FFT processed at one time with all transmitters in assurance network;
4) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network adopts IFFT that the cascade interweaved coding modulation data piece of empty frequency modulation FFT processed is transformed to the cascade interweaved coding modulation data sample value of sky frequency modulation time domain discrete processed piece D
total;
5) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network is divided equally into two by the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed piece in order, the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed sub-block D
1with the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed sub-block D
2, D
total=[D
1, D
2];
6) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network passes through peak-to-average power ratio adjustment unit to the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed sub-block D
1, the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed sub-block D
2carry out that signal adds, subtracts, the operation independent of conjugation is processed or combinatorial operation is processed and the synthetic new cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed piece D again
new, the new cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed piece D
newadopt following generate pattern to obtain, generate pattern 1 is D
new=[D
1, D
2], generate pattern 2 is
generate pattern 3 is
Generate pattern 4 is
Generate pattern 5 is
, generate pattern 6 is
Generate pattern 7 is D
new=[D
* 1, D
2], generate pattern 8 is
generate pattern 9 is
Generate pattern 10 is
Generate pattern 11 is
generate pattern 12 is
Compare the synthetic cascade interweaved coding modulation data sample value of the empty frequency modulation time domain discrete processed piece D of 12 kinds of generate patterns
new, choose wherein there is minimum peak-to-average power ratio the cascade interweaved coding modulation data sample value of the empty frequency modulation time domain discrete processed of peak-to-average power ratio piece falls
and the cascade interweaved coding modulation data sample value of the empty frequency modulation time domain discrete processed of peak-to-average power ratio piece will fall
the corresponding generate pattern information adopting send to operational indicator sequence setting unit, wherein, D
* 1expression is to the cascade interweaved coding modulation data sample value of empty frequency modulation time domain discrete processed sub-block D
1the cascade interweaved coding modulation data sample value of each sky frequency modulation time domain discrete processed carry out conjugate operation processing and the cascade interweaved coding modulation data sample value of the empty frequency modulation time domain discrete processed sub-block that obtains;
7) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network inserts using Cyclic Prefix as protection interval and falls the cascade interweaved coding modulation data sample value of the empty frequency modulation time domain discrete processed of peak-to-average power ratio piece, the discrete cascade interweaving encoding of the empty frequency modulation time domain cyclic prefix processed of peak-to-average power ratio modulating data sample value piece falls in formation, as frame, the length of Cyclic Prefix is C, and the length of falling the discrete cascade interweaving encoding of the empty frequency modulation time domain cyclic prefix processed of peak-to-average power ratio modulating data sample value piece is C+K;
8) the real part sequence of the anti-fading movable signal transmitter of each digital broadcasting in single frequency network using training sequence as sequence of plural training, the imaginary part sequence using the set operational indicator sequence of operational indicator sequence setting unit as sequence of plural training, in time domain, form the discrete sample block of sequence of plural training, the length of the discrete sample block of training sequence, operational indicator sequence, sequence of plural training is all X, and operational indicator sequence is comprising and unique each system parameters and business model information of expressing the anti-fading movable signal transmitter of digital broadcasting; X gets in 512,1024,2048; When X gets 512, K gets 2048, C and gets 1/4 of K size; When X gets 1024, K gets 4096, C and gets 1/8 of K size; When X gets 2048, K gets 8192, C and gets 1/16 of K size;
9) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network repeats the discrete sample block of the sequence of plural training forming in time domain continuously to form time domain repetition training series of discrete sample value piece for 2 times in time domain, as frame head;
10) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network is that frame head is inserted into that to fall the discrete cascade interweaving encoding of the empty frequency modulation time domain cyclic prefix processed of peak-to-average power ratio modulating data sample value piece be frame by time domain repetition training series of discrete sample value piece, to form signal frame;
11) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network adopts square root raised cosine filter to be shaped to the signal pulse of signal frame;
12) the anti-fading movable signal transmitter of each digital broadcasting in single frequency network forms emission of radio frequency signals to on-air radio channel by baseband signal up-conversion to carrier wave;
13) radiofrequency signal that the anti-fading movable signal transmitter of each digital broadcasting in the anti-fading movable signal receiver detection of the digital broadcasting in single frequency network reception single frequency network sends also forms baseband signal by its down-conversion, utilizes the Cyclic Prefix characteristic of signal frame and the architectural characteristic of signal frame to carry out baseband signal reception & disposal.
2. by the anti-fading mobile signal transmission method for digital broadcast single-frequency network of claim 1, it is characterized in that: described training sequence, operational indicator sequence form by a series of 1 or-1, have pseudo-random characteristics.
3. by the anti-fading mobile signal transmission method for digital broadcast single-frequency network of claim 1, it is characterized in that: described training sequence, operational indicator sequence have orthogonality each other.
4. by the anti-fading mobile signal transmission method for digital broadcast single-frequency network of claim 1, it is characterized in that: the encoding rate of described LDPC coding is in 1/4,1/2,5/8,3/4 and 7/8; Code element is modulated to a kind of in QPSK, 16QAM, 64QAM and 256QAM, and symbol constellations figure mapping mode adopts Gray code mapping; Code element rotation is by rotating to an angle and realize symbol constellations figure, the symbol constellations figure anglec of rotation of QPSK is 22.5 degree, the symbol constellations figure anglec of rotation of 16QAM is 11.25 degree, the symbol constellations figure anglec of rotation of 64QAM is 5.626 degree, and the symbol constellations figure anglec of rotation of 256QAM is 2.8125 degree; Symbol interleave adopts random interleaving mode.
5. by the anti-fading mobile signal transmission method for digital broadcast single-frequency network of claim 1, it is characterized in that: the cascade interweaved coding modulation data piece of described empty frequency modulation FFT processed is comprised of subcarrier; When X gets 512, the frequency interval of subcarrier is got 4KHz; When X gets 1024, the frequency interval of subcarrier is got 2KHz; When X gets 2048, the frequency interval of subcarrier is got 1KHz.
6. by the anti-fading mobile signal transmission method for digital broadcast single-frequency network of claim 1, it is characterized in that: the baseband signal reception & disposal that the anti-fading movable signal receiver of described digital broadcast single-frequency network carries out, one of them step is that the time domain and frequency domain combined alternate analysis of signal frame head and signal frame body is processed.
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101420408A (en) * | 2008-10-27 | 2009-04-29 | 宁波大学 | Interference resistant modulation method for digital television terrestrial broadcast transmitter |
| CN101778084A (en) * | 2010-03-03 | 2010-07-14 | 宁波大学 | Method for transmitting anti-fading wireless multi-media broadcast signal in single frequency network |
| CN101778073A (en) * | 2010-03-03 | 2010-07-14 | 宁波大学 | Multimedia broadcast wireless signal single-frequency network anti-fading transmission method |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101420408A (en) * | 2008-10-27 | 2009-04-29 | 宁波大学 | Interference resistant modulation method for digital television terrestrial broadcast transmitter |
| CN101778084A (en) * | 2010-03-03 | 2010-07-14 | 宁波大学 | Method for transmitting anti-fading wireless multi-media broadcast signal in single frequency network |
| CN101778073A (en) * | 2010-03-03 | 2010-07-14 | 宁波大学 | Multimedia broadcast wireless signal single-frequency network anti-fading transmission method |
Non-Patent Citations (4)
| Title |
|---|
| 《OFDM系统中降低峰均比技术研究》;吴新春;《中国博士学位论文全文数据库》;20110706;第21-33页 * |
| 《利用子块二维优化组合降低MIMO-OFDM系统峰均比》;王立波等;《西北工业大学学报》;20091231;第27卷(第6期);第833-837页 * |
| 吴新春.《OFDM系统中降低峰均比技术研究》.《中国博士学位论文全文数据库》.2011,第21-33页. |
| 王立波等.《利用子块二维优化组合降低MIMO-OFDM系统峰均比》.《西北工业大学学报》.2009,第27卷(第6期),第833-837页. |
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