CN103763244A - Framing modulation method for multimedia wireless broadcast signals - Google Patents
Framing modulation method for multimedia wireless broadcast signals Download PDFInfo
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Abstract
The invention discloses a framing modulation method for multimedia wireless broadcast signals, and relates to a mixed framing modulation scheme of the time domain and the frequency domain. According to the training sequence optimization design, the signal generating scheme and the signal selecting method of the framing modulation method for the multimedia wireless broadcast signals, OFDM signals can be processed and recovered at a receiver end easily to obtain original signals of the OFDM signals. The framing modulation method for the multimedia wireless broadcast signals has the advantages of being low in peak-to-average power ratio, short in synchronization time, resistant to channel fading, multiple in controllable service and the like.
Description
Technical field
The invention belongs to wireless communication field, relate more specifically to a kind of method for modulating framing of multimedia wireless broadcast signals.
Background technology
At present, television broadcasting is from simulating gradually to digitlization future development.Digital TV multimedia radio transmission system, as the important component part of digital TV multimedia radio broadcasting, the development of its correlation technique, closely bound up with people's quality of life, and be therefore subject to people's extensive concern especially.Digital TV multimedia radio broadcasting correlation technique and related industry thereof are that in Communications And Computer field, development is very fast, the industry of good market prospect.In digital TV multimedia radio broadcasting correlation technique, the emphasis that various countries pay close attention to is at present that the digital TV multimedia radio broadcasting how to pass under environment for complex wave provides the implementation of reliable high-speed mobile cheaply.Multi-media radio broadcast signal transmission machine framing modulation technique is the key technology of digital TV multimedia wireless broadcast system, for whole system performance, plays conclusive effect, is the object of everybody primary study.
Due to the develop rapidly of Digital Signal Processing and integrated circuit technique, the system of OFDM (OFDM) technology realizes and becomes more and more easier.Because OFDM Multicarrier Transmission Technology has simple in structure, the availability of frequency spectrum is high, the plurality of advantages such as in the time of can resisting frequency selectivity and channel, becomes and extremely everybody concern obtain deep research and the extensive use in the numerous areas such as Xds1, wide-band mobile communication, wideband wireless local area network, digital TV multimedia radio broadcasting.
The peak-to-average power ratio that ofdm signal is higher (PAPR) has very high requirement to the range of linearity of amplifier and digital to analog converter, if system linearity scope can not meet the variation of signal, can cause signal distortion, signal spectrum is changed, thereby cause the orthogonality between subchannel to be destroyed, produce phase mutual interference, make system performance degradation.Therefore 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.
In practical communication environment, digital TV multimedia wireless broadcast communication systematic function is subject to the impact of the factors such as lock in time, clock jitter, channel fading, channel disturbance.Multi-media radio broadcast signal transmission machine framing modulator approach is to realize the key technology of reliable digit television multimedia radio broadcasting.
Utilizing digital TV multimedia radio 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 multimedia radio transmission system satisfies social needs.
Based on above background, the present invention is directed to practical communication environment and propose a kind of method for modulating framing of multimedia wireless broadcast signals just, can meet the needs that high coded data rate can be controlled multi-service digital TV multimedia radio 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?wireless?multimedia?communications”.Boston：Artech?House.2000.
Y.Wu，S.Hirakawa，U.H.Reimers，and?J.Whitaker.“Overview?of?digital?television?deve?l?opment，”Proceedings?ofthe?IEEE?Special?Issue?on?Global?Digital?Television.：Technology?andEmergingServices,pp.8-21，Jan.2006.
M.S.Richer，G.Reitmeier，T.Gurley，G.A.Jones，J.Whitaker，and?R.Rast.“The?ATSC?digital?television?system，”Proceedings?ofthe?IEEESpecial?Issue?on?Global?Digi?tal?Television.：Technology?and?Emerging?Services，pp.37-43，Jan.2006.
U.Ladebusch?and?C.A.Li?ss.“Terrestrial?DVB(DVB-T)：A?broadcast?technology?for?stationary?portable?and?mobi?le?use，”Proceedings?of?the?IEEE,Special?Issue?on?Global?Digi?tal?Tele?vision.：Technology?and?Emerging?Services，pp.183-194，Jan.2006.
M.Takada?and?M.Saito.“Transmission?systems?for?ISDB-T，”Proceedings?of?the?IEEE?Special?Issue?on?Global?Digi?tal?Tele?vision.：Technology?and?Emerging?Services，pp.251-256，Jan.2006.
Summary of the invention
The present invention is directed to high coded data rate and can control multi-service digital TV multimedia radio broadcasting problem, proposed a kind of method for modulating framing of multimedia wireless broadcast signals.
A kind of method for modulating framing of multimedia wireless broadcast signals that the present invention proposes, is characterized in that it comprises the following steps:
1) multi-media radio broadcast signal transmission machine is deleted the input data bit of oneself the serially concatenated multi code Rate of Chinese character of flowing through remaining convolutional encoding and on frequency domain, is formed FFT coded data block, and the length of FFT coded data block is K, and the numerical value of K is got even number;
2) multi-media radio broadcast signal transmission machine adopts IFFT that FFT coded data block is transformed to time domain discrete coded data sample value piece D
total=[d
0, d
1..., d
k-2, d
k-1];
3) multi-media radio broadcast signal transmission machine is by time domain discrete coded data sample value piece demultiplexing and according to the sequencing odd even of each the time domain discrete coded data sample value successively separated strange sub-block D of time domain discrete coded data sample value that generates
very=[d
0, d
2..., d
k-4, d
k-2] and the even sub-block D of time domain discrete coded data sample value
even=[d
1, d
3..., d
k-3, d
k-1];
4) multi-media radio broadcast signal transmission machine passes through peak-to-average power ratio adjustment unit to the strange sub-block D of time domain discrete coded data sample value
very, the even sub-block D of time domain discrete coded data sample value
evencarry out signal power adjustment and corresponding signal and process also synthetic new time domain discrete coded data sample value piece D again
new, new time domain discrete coded data sample value piece D
newadopt following generate pattern to obtain, generate pattern 1 is D
new=[D
very, D
even], 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
* very, D
even], generate pattern 8 is
generate pattern 9 is
generate pattern 10 is
generate pattern 11 is
generate pattern 12 is
generate pattern 13 is D
new=[D
very, D
* even], generate pattern 14 is
generate pattern 15 is
generate pattern 16 is
generate pattern 17 is
generate pattern 18 is
compare 18 kinds of time domain discrete coded data sample value piece D that generate pattern is synthetic
new, choose wherein there is minimum peak-to-average power ratio peak-to-average power ratio time domain discrete coded data sample value piece falls
and peak-to-average power ratio time domain discrete coded data sample value piece will fall
the corresponding generate pattern information adopting send to operational indicator sequence setting unit, wherein, D
* veryexpression is to the strange sub-block D of time domain discrete coded data sample value
veryeach time domain discrete coded data sample value carry out conjugate operation processing and the time domain discrete coded data sample value sub-block that obtains; D
* evenexpression is to the even sub-block D of time domain discrete coded data sample value
eveneach time domain discrete coded data sample value carry out conjugate operation processing and the time domain discrete coded data sample value sub-block that obtains;
5) multi-media radio broadcast signal transmission machine Insert service index series after training sequence forms time domain embedding training sequence discrete sample block in time domain, and operational indicator sequence is comprising and unique each system parameters and business model information of expressing multi-media radio broadcast signal transmission machine; Time domain embeds the length and the length numerically equal of falling peak-to-average power ratio time domain discrete coded data sample value piece of training sequence discrete sample block;
6) multi-media radio broadcast signal transmission machine will fall peak-to-average power ratio time domain discrete coded data sample value piece, time domain and embed training sequence discrete sample block and directly superpose and form time domain and embed training sequence and fall peak-to-average power ratio time domain discrete coded data sample value piece, as frame;
7) multi-media radio broadcast signal transmission machine is that frame head inserts time domain and embeds training sequence to fall peak-to-average power ratio time domain discrete coded data sample value piece be frame using Cyclic Prefix as protection interval, and to form signal frame, the length of Cyclic Prefix is C;
8) multi-media radio broadcast signal transmission machine adopts square root raised cosine filter to be shaped to the signal pulse of signal frame;
9) multi-media radio broadcast signal transmission machine by baseband signal up-conversion to carrier wave.
Method for modulating framing of multimedia wireless broadcast signals according to above-mentioned, is characterized in that: multi-media radio broadcast signal transmission machine peak-to-average power ratio time domain discrete coded data sample value piece falls by time domain discrete coded data sample value piece demultiplexing and carry out signal power adjustment and corresponding signal according to the sequencing odd even of each the time domain discrete coded data sample value successively separated strange sub-block of time domain discrete coded data sample value generating and the even sub-block of time domain discrete coded data sample value and process and pass through 18 kinds of generate patterns of particular design and again synthesize; The training sequence of multi-media radio broadcast signal transmission machine is comprised of the first training sequence and the second training sequence; The first training sequence alternately inserts the new sequence of generation by each symbol of permanent envelope zero auto-correlation CAZAC sequence B and pseudorandom PN sequence A and Cyclic Prefix that length is G forms; The second training sequence is by permanent envelope zero auto-correlation CAZAC sequence-B
*with pseudorandom PN sequence A
*each symbol alternately insert the Cyclic Prefix that the new sequence that produces and length thereof are G and form; B
*expression is carried out conjugate operation processing, A to each symbol of B
*expression is carried out conjugate operation processing to each symbol of A, and B has identical symbol lengths L with A; The circulating prefix-length G of the first training sequence and the second training sequence be the first training sequence and the second training sequence symbol lengths L 1/8; The circulating prefix-length C of multi-media radio broadcast signal transmission machine signal frame is 1/16 of FFT coded data block length K; The operational indicator sequence of multi-media radio broadcast signal transmission machine has pseudo-random characteristics, by one group of Phase shift m sequence, is realized; Each different operational indicator sequence of multi-media radio broadcast signal transmission machine is comprising and unique each system parameters and business model information of expressing multi-media radio broadcast signal transmission machine; The FFT coded data block of multi-media radio broadcast signal transmission machine is comprised of subcarrier, and the frequency interval of subcarrier is got a kind of in 2KHz, 4KHz, 1KHz; Serially concatenated multi code Rate of Chinese character is deleted remaining convolutional encoding and is formed more than being deleted by random interleaving serially concatenated by two convolutional encodings, and the encoding rate that serially concatenated multi code Rate of Chinese character is deleted remaining convolutional encoding is in 1/4,4/9,3/8,7/16 and 5/9.
Feature of the present invention:
The present invention is the framing modulation scheme that a kind of time-domain and frequency-domain mixes.Time domain discrete coded data sample value piece demultiplexing of the present invention also generates the time domain discrete strange sub-block of coded data sample value and the even sub-block of time domain discrete coded data sample value and the corresponding signal power adjustment of carrying out and signal processing according to the sequencing odd even of each time domain discrete coded data sample value successively separation, what by particular design 18 kinds fell the generate pattern of peak-to-average power ratio time domain discrete coded data sample value piece and had a minimum peak-to-average power ratio falls peak-to-average power ratio time domain discrete coded data sample value piece choosing method, 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 power regularity of distribution that the characteristic that the real part of the ofdm signal when number of sub carrier wave is larger (or imaginary part) is multiple Gaussian random process and whose amplitude obeys Rayleigh distribution and then low complex degree ground effectively change over frame signal reaches the object that reduces peak-to-average power ratio, 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.Training sequence in the signal frame of multi-media radio broadcast signal transmission machine is obtained through certain optimisation design by permanent envelope zero auto-correlation CAZAC sequence and pseudorandom PN sequence, it is by falling peak-to-average power ratio time domain discrete coded data sample value piece that peak-to-average power ratio time domain discrete coded data sample value piece falls in the time domain embedding training sequence of multi-media radio broadcast signal transmission machine, time domain embeds training sequence discrete sample block and directly superposes and form, these have guaranteed that multi-media radio broadcast signal receiver 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 time domain embedding training sequence and fall peak-to-average power ratio time domain discrete coded data sample value piece to form signal frame, can reduce the interference effect between adjacent signals frame.Adopting serial multi code Rate of Chinese character to delete remaining convolutional encoding carries out chnnel coding to input data the error-correcting performance that approaches shannon limit is provided.Each different operational indicator sequence of multi-media radio broadcast signal transmission machine is comprising and unique each system parameters and business model information of expressing multi-media radio broadcast signal transmission machine, can, so that digital TV multimedia radio 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.Framing modulator approach 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 coded data rate can control the plurality of advantages such as multi-service digital TV multimedia radio transmission.
Accompanying drawing explanation
Fig. 1 is the embodiment schematic diagram according to certain transmitter of method for modulating framing of multimedia wireless broadcast signals of the present invention.
Fig. 2 is according to the embodiment schematic diagram of certain transmitter signal framing modulation of method for modulating framing of multimedia wireless broadcast signals of the present invention.
Embodiment
Below in conjunction with accompanying drawing, specific embodiments of the invention are described in detail.
The embodiment of certain transmitter of the method for modulating framing of multimedia wireless broadcast signals proposing according to the present invention, as shown in Figure 1, follows these steps to carry out:
1) this certain multi-media radio broadcast signal transmission machine is deleted the input data bit of oneself the serially concatenated multi code Rate of Chinese character of flowing through remaining convolutional encoding and on frequency domain, is formed FFT coded data block, and the length of FFT coded data block is K, and the numerical value of K is got even number; Serially concatenated multi code Rate of Chinese character is deleted remaining convolutional encoding and is formed more than being deleted by random interleaving serially concatenated by two convolutional encodings, and the encoding rate that serially concatenated multi code Rate of Chinese character is deleted remaining convolutional encoding is in 1/4,4/9,3/8,7/16 and 5/9;
2) this certain multi-media radio broadcast signal transmission machine adopts IFFT that FFT coded data block is transformed to time domain discrete coded data sample value piece D
total=[d
0, d
1..., d
k-2, d
k-1];
3) this certain multi-media radio broadcast signal transmission machine is by time domain discrete coded data sample value piece demultiplexing and according to the sequencing odd even of each the time domain discrete coded data sample value successively separated strange sub-block D of time domain discrete coded data sample value that generates
very=[d
0, d
2..., d
k-4, d
k-2] and the even sub-block D of time domain discrete coded data sample value
even=[d
1, d
3..., d
k-3, d
k-1];
4) this certain multi-media radio broadcast signal transmission machine passes through peak-to-average power ratio adjustment unit to the strange sub-block D of time domain discrete coded data sample value
very, the even sub-block D of time domain discrete coded data sample value
evencarry out signal power adjustment and corresponding signal and process also synthetic new time domain discrete coded data sample value piece D again
new, new time domain discrete coded data sample value piece D
newadopt following generate pattern to obtain, generate pattern 1 is D
new=[D
very, D
even], 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
* very, D
even], generate pattern 8 is
generate pattern 9 is
generate pattern 10 is
generate pattern 11 is
generate pattern 12 is
generate pattern 13 is D
new=[D
very, D
* even], generate pattern 14 is
generate pattern 15 is
generate pattern 16 is
generate pattern 17 is
generate pattern 18 is
compare 18 kinds of time domain discrete coded data sample value piece D that generate pattern is synthetic
new, choose wherein there is minimum peak-to-average power ratio peak-to-average power ratio time domain discrete coded data sample value piece falls
and peak-to-average power ratio time domain discrete coded data sample value piece will fall
the corresponding generate pattern information adopting send to operational indicator sequence setting unit, wherein, D
* veryexpression is to the strange sub-block D of time domain discrete coded data sample value
veryeach time domain discrete coded data sample value carry out conjugate operation processing and the time domain discrete coded data sample value sub-block that obtains; D
* evenexpression is to the even sub-block D of time domain discrete coded data sample value
eveneach time domain discrete coded data sample value carry out conjugate operation processing and the time domain discrete coded data sample value sub-block that obtains;
5) this certain multi-media radio broadcast signal transmission machine Insert service index series after training sequence forms time domain embedding training sequence discrete sample block in time domain, and operational indicator sequence is comprising and unique each system parameters and business model information of expressing multi-media radio broadcast signal transmission machine; Time domain embeds the length and the length numerically equal of falling peak-to-average power ratio time domain discrete coded data sample value piece of training sequence discrete sample block;
6) this certain multi-media radio broadcast signal transmission machine will fall peak-to-average power ratio time domain discrete coded data sample value piece, time domain and embed training sequence discrete sample block and directly superpose and form time domain and embed training sequence and fall peak-to-average power ratio time domain discrete coded data sample value piece, as frame;
7) this certain multi-media radio broadcast signal transmission machine is that frame head inserts time domain and embeds training sequence to fall peak-to-average power ratio time domain discrete coded data sample value piece be frame using Cyclic Prefix as protection interval, and to form signal frame, the length of Cyclic Prefix is C;
8) this certain multi-media radio broadcast signal transmission machine adopts square root raised cosine filter to be shaped to the signal pulse of signal frame;
9) this certain multi-media radio broadcast signal transmission machine by baseband signal up-conversion to carrier wave.
Embodiment according to certain transmitter signal framing modulation of method for modulating framing of multimedia wireless broadcast signals of the present invention, as shown in Figure 2, is specifically implemented as follows:
This certain multi-media radio broadcast signal transmission machine is deleted the input data bit of oneself the serially concatenated multi code Rate of Chinese character of flowing through remaining convolutional encoding and on frequency domain, is formed FFT coded data block, through IFFT, be transformed to again the discrete coded data sample value piece of time domain, by peak-to-average power ratio adjustment unit, generate and to choose the peak-to-average power ratio time domain discrete coded data sample value piece that falls wherein with minimum peak-to-average power ratio and the generate pattern information of the corresponding employing of institute is sent to operational indicator sequence setting unit simultaneously.
The FFT coded data block of this certain multi-media radio broadcast signal transmission machine is comprised of subcarrier, and the frequency interval of subcarrier is got a kind of in 2KHz, 4KHz, 1KHz; The serially concatenated multi code Rate of Chinese character of this certain multi-media radio broadcast signal transmission machine is deleted remaining convolutional encoding and is formed more than being deleted by random interleaving serially concatenated by two convolutional encodings, and the encoding rate that serially concatenated multi code Rate of Chinese character is deleted remaining convolutional encoding is in 1/4,4/9,3/8,7/16 and 5/9.
The training sequence of this certain multi-media radio broadcast signal transmission machine is comprised of the first training sequence and the second training sequence; The first training sequence alternately inserts the new sequence of generation by each symbol of permanent envelope zero auto-correlation CAZAC sequence B and pseudorandom PN sequence A and Cyclic Prefix that length is G forms; The second training sequence is by permanent envelope zero auto-correlation CAZAC sequence-B
*with pseudorandom PN sequence A
*each symbol alternately insert the Cyclic Prefix that the new sequence that produces and length thereof are G and form; B
*expression is carried out conjugate operation processing, A to each symbol of B
*expression is carried out conjugate operation processing to each symbol of A, and B has identical symbol lengths L with A; The circulating prefix-length G of the first training sequence and the second training sequence be the first training sequence and the second training sequence symbol lengths L 1/8.
This certain multi-media radio broadcast signal transmission machine Insert service index series after training sequence forms time domain and embeds training sequence discrete sample block in time domain.
The operational indicator sequence of this certain multi-media radio broadcast signal transmission machine has pseudo-random characteristics, by one group of Phase shift m sequence, is realized; Each different operational indicator sequence of this certain multi-media radio broadcast signal transmission machine is comprising and unique each system parameters and business model information of expressing multi-media radio broadcast signal transmission machine.
The time domain of this certain multi-media radio broadcast signal transmission machine embeds the length and the length numerically equal of falling peak-to-average power ratio time domain discrete coded data sample value piece of training sequence discrete sample block; This certain multi-media radio broadcast signal transmission machine will fall peak-to-average power ratio time domain discrete coded data sample value piece, time domain and embed training sequence discrete sample block and directly superpose and form time domain and embed training sequence and fall peak-to-average power ratio time domain discrete coded data sample value piece, as frame; This certain multi-media radio broadcast signal transmission machine is that frame head inserts time domain and embeds training sequence to fall peak-to-average power ratio time domain discrete coded data sample value piece be frame using Cyclic Prefix as protection interval, and to form signal frame, the length of Cyclic Prefix is C; The circulating prefix-length C of this certain multi-media radio broadcast signal transmission machine signal frame is 1/16 of FFT coded data block length K.
This certain multi-media radio broadcast signal transmission machine adopts square root raised cosine filter to carry out pulse shaping to the signal of signal frame.
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. a method for modulating framing of multimedia wireless broadcast signals, is characterized in that it comprises the following steps:
1) multi-media radio broadcast signal transmission machine is deleted the input data bit of oneself the serially concatenated multi code Rate of Chinese character of flowing through remaining convolutional encoding and on frequency domain, is formed FFT coded data block, and the length of FFT coded data block is K, and the numerical value of K is got even number;
2) multi-media radio broadcast signal transmission machine adopts IFFT that FFT coded data block is transformed to time domain discrete coded data sample value piece D
total=[d
0, d
1..., d
k-2, d
k-1];
3) multi-media radio broadcast signal transmission machine is by time domain discrete coded data sample value piece demultiplexing and according to the sequencing odd even of each the time domain discrete coded data sample value successively separated strange sub-block D of time domain discrete coded data sample value that generates
very=[d
0, d
2..., d
k-4, d
k-2] and the even sub-block D of time domain discrete coded data sample value
even=[d
1, d
3..., d
k-3, d
k-1];
4) multi-media radio broadcast signal transmission machine passes through peak-to-average power ratio adjustment unit to the strange sub-block D of time domain discrete coded data sample value
very, the even sub-block D of time domain discrete coded data sample value
evencarry out signal power adjustment and corresponding signal and process also synthetic new time domain discrete coded data sample value piece D again
new, new time domain discrete coded data sample value piece D
newadopt following generate pattern to obtain, generate pattern 1 is D
new=[D
very, D
even], 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
* very, D
even], generate pattern 8 is
generate pattern 9 is
generate pattern 10 is
generate pattern 11 is
generate pattern 12 is
generate pattern 13 is D
new=[D
very, D
* even], generate pattern 14 is
generate pattern 15 is
generate pattern 16 is
generate pattern 17 is
generate pattern 18 is
compare 18 kinds of time domain discrete coded data sample value piece D that generate pattern is synthetic
new, choose wherein there is minimum peak-to-average power ratio peak-to-average power ratio time domain discrete coded data sample value piece falls
and peak-to-average power ratio time domain discrete coded data sample value piece will fall
, the corresponding generate pattern information adopting send to operational indicator sequence setting unit, wherein, D
* veryexpression is to the strange sub-block D of time domain discrete coded data sample value
veryeach time domain discrete coded data sample value carry out conjugate operation processing and the time domain discrete coded data sample value sub-block that obtains; D
* evenexpression is to the even sub-block D of time domain discrete coded data sample value
eveneach time domain discrete coded data sample value carry out conjugate operation processing and the time domain discrete coded data sample value sub-block that obtains;
5) multi-media radio broadcast signal transmission machine Insert service index series after training sequence forms time domain embedding training sequence discrete sample block in time domain, and operational indicator sequence is comprising and unique each system parameters and business model information of expressing multi-media radio broadcast signal transmission machine; Time domain embeds the length and the length numerically equal of falling peak-to-average power ratio time domain discrete coded data sample value piece of training sequence discrete sample block;
6) multi-media radio broadcast signal transmission machine will fall peak-to-average power ratio time domain discrete coded data sample value piece, time domain and embed training sequence discrete sample block and directly superpose and form time domain and embed training sequence and fall peak-to-average power ratio time domain discrete coded data sample value piece, as frame;
7) multi-media radio broadcast signal transmission machine is that frame head inserts time domain and embeds training sequence to fall peak-to-average power ratio time domain discrete coded data sample value piece be frame using Cyclic Prefix as protection interval, and to form signal frame, the length of Cyclic Prefix is C;
8) multi-media radio broadcast signal transmission machine adopts square root raised cosine filter to be shaped to the signal pulse of signal frame;
9) multi-media radio broadcast signal transmission machine by baseband signal up-conversion to carrier wave.
2. by the method for modulating framing of multimedia wireless broadcast signals of claim 1, it is characterized in that: described training sequence is comprised of the first training sequence and the second training sequence; The first training sequence alternately inserts the new sequence of generation by each symbol of permanent envelope zero auto-correlation CAZAC sequence B and pseudorandom PN sequence A and Cyclic Prefix that length is G forms; The second training sequence is by permanent envelope zero auto-correlation CAZAC sequence-B
*with pseudorandom PN sequence A
*each symbol alternately insert the Cyclic Prefix that the new sequence that produces and length thereof are G and form; B
*expression is carried out conjugate operation processing, A to each symbol of B
*expression is carried out conjugate operation processing to each symbol of A, and B has identical symbol lengths L with A.
3. by the method for modulating framing of multimedia wireless broadcast signals of claim 1, it is characterized in that: described C gets 1/16 of K; Described serially concatenated multi code Rate of Chinese character is deleted remaining convolutional encoding and is formed more than being deleted by random interleaving serially concatenated by two convolutional encodings, and the encoding rate that serially concatenated multi code Rate of Chinese character is deleted remaining convolutional encoding is in 1/4,4/9,3/8,7/16 and 5/9.
4. by the method for modulating framing of multimedia wireless broadcast signals of claim 1, it is characterized in that: described operational indicator sequence has pseudo-random characteristics, by one group of Phase shift m sequence, realized.
5. by the method for modulating framing of multimedia wireless broadcast signals of claim 1, it is characterized in that: described FFT coded data block is comprised of subcarrier, the frequency interval of subcarrier is got a kind of in 2KHz, 4KHz, 1KHz.
6. by the method for modulating framing of multimedia wireless broadcast signals of claim 1, it is characterized in that: described G gets 1/8 of L.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1885846A (en) * | 2006-05-22 | 2006-12-27 | 北京北方烽火科技有限公司 | Orthogonal frequency-division multiplexing system and selective mapping transmitting and receiving method |
| CN1968237A (en) * | 2005-11-18 | 2007-05-23 | 华为技术有限公司 | Apparatus and method for reducing mean peak power rate in orthogonal frequency-division multiplexing system |
| US20090003478A1 (en) * | 2006-01-13 | 2009-01-01 | Electronics And Telecommunications Research | Method and Apparatus for Generating and Receiving Ofdm Symbol |
| CN102263761A (en) * | 2011-08-22 | 2011-11-30 | 宁波大学 | Method for modulating framing of multimedia wireless broadcast signals |
| CN102882670A (en) * | 2012-09-13 | 2013-01-16 | 电子科技大学 | Synchronous processing method based on CMMB signals |
| CN103326985A (en) * | 2013-07-15 | 2013-09-25 | 浙江师范大学 | Method for reducing peak-to-mean ratio in OFDM (Orthogonal Frequency Division Multiplexing) |
-
2014
- 2014-01-13 CN CN201410021339.XA patent/CN103763244A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1968237A (en) * | 2005-11-18 | 2007-05-23 | 华为技术有限公司 | Apparatus and method for reducing mean peak power rate in orthogonal frequency-division multiplexing system |
| US20090003478A1 (en) * | 2006-01-13 | 2009-01-01 | Electronics And Telecommunications Research | Method and Apparatus for Generating and Receiving Ofdm Symbol |
| CN1885846A (en) * | 2006-05-22 | 2006-12-27 | 北京北方烽火科技有限公司 | Orthogonal frequency-division multiplexing system and selective mapping transmitting and receiving method |
| CN102263761A (en) * | 2011-08-22 | 2011-11-30 | 宁波大学 | Method for modulating framing of multimedia wireless broadcast signals |
| CN102882670A (en) * | 2012-09-13 | 2013-01-16 | 电子科技大学 | Synchronous processing method based on CMMB signals |
| CN103326985A (en) * | 2013-07-15 | 2013-09-25 | 浙江师范大学 | Method for reducing peak-to-mean ratio in OFDM (Orthogonal Frequency Division Multiplexing) |
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