CN103152309B - Reduce the frequency domain autocorrelation matching system and method for the peak-to-average power ratio of ofdm system - Google Patents

Reduce the frequency domain autocorrelation matching system and method for the peak-to-average power ratio of ofdm system Download PDF

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CN103152309B
CN103152309B CN201310081169.XA CN201310081169A CN103152309B CN 103152309 B CN103152309 B CN 103152309B CN 201310081169 A CN201310081169 A CN 201310081169A CN 103152309 B CN103152309 B CN 103152309B
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frequency domain
autocorrelation
signal
sequence
rotatable phase
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CN103152309A (en
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杨霖
贾莹莹
王田
胡武君
李少谦
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University of Electronic Science and Technology of China
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Abstract

The invention discloses a kind of frequency domain autocorrelation matching system and method reducing the peak-to-average power ratio of ofdm system, generate the autocorrelation signal of frequency domain sequence, then SLM method is traditionally carried out processing to frequency domain autocorrelation signal and is transmitted, M rotatable phase sequence in Received signal strength and transmitter rotatable phase sequencer is done point multiplication operation and is obtained M and output signal by receiver, respectively auto-correlation computation is carried out to this M output signal, signal maximum for wherein autocorrelation value is recovered frequency domain sequence through autocorrelation signal generator inverse transform module, just original serial data stream can be recovered again through demodulation and parallel/serial conversion.The present invention is by the middle of the Information Embedding of rotatable phase sequence to the autocorrelation of frequency domain autocorrelation signal, and the autocorrelation of the output signal utilizing Received signal strength and rotatable phase sequence dot product gained to arrive recovers primary signal, without the need to the transmission of the secondary information of sideband.

Description

Reduce the frequency domain autocorrelation matching system and method for the peak-to-average power ratio of ofdm system
Technical field
The invention belongs to wireless communication technology field, more specifically say, relate to a kind of frequency domain autocorrelation matching system and method reducing the peak-to-average power ratio of ofdm system.
Background technology
In the existing communication technology, OFDM(Orthogonal Frequency Division Multiplexing, OFDM) technology with its very high availability of frequency spectrum, good anti-multipath fading and interference free performance, become one of major candidate of following mobile multimedia communication.A typical ofdm signal can be expressed as follows:
x ( t ) = 1 N Σ n = 0 N - 1 X ( n ) exp ( j 2 π f n t ) , 0 ≤ t ≤ T
Wherein, N is the number of subcarrier, and X (n) is the frequency domain data symbol that the n-th subcarrier transmits, f nbe the frequency of the n-th subcarrier, T is the duration of an OFDM symbol.
One of major defect of ofdm system is PAPR(Peak to Average Power Ratio, papr) higher.OFDM symbol is independently formed by stacking through the sub-carrier signal of ovennodulation by multiple, may produce larger peak power, and brings larger PAPR thus.The PAPR of ofdm signal is defined as:
PAPR = max { | x ( t ) | 2 } E { | x ( t ) | 2 }
A kind of main stream approach of current reduction ofdm system peak-to-average power ratio PAPR is SLM(SelectedMapping, selected mapping method) method.The general principle of SLM method is: the rotatable phase sequence that the ofdm signal of input and U modulus value are 1 is multiplied, and obtains the output signal that U represents identical information.Then this U signal is carried out IFFT conversion respectively, and that signal therefrom selecting PAPR minimum sends.In order to correctly demodulation can be carried out to received signal at receiving terminal, the secondary information of transmitted sideband must represent that concrete which rotatable phase sequence what send be at transmitting terminal.
Fig. 1 is the communication system frame diagram adopting traditional SLM method to reduce the peak-to-average power ratio of ofdm system.As shown in Figure 1, communication system based on traditional SLM method comprises rotatable phase sequencer 101 and transmitter, receiver three parts, wherein transmitter comprises: serial/parallel conversion module 102, digital modulation module 103, IFFT(Inverse Fast Fourier Transform, invert fast fourier transformation) module 104, best PAPR selector 105, D/A(Digital/Analog, digital-to-analog) modular converter 106, radiofrequency emitting module 107; Receiver section comprises: Receiver Module 108, A/D(Analog/Digital, analog/digital) modular converter 109, FFT(Fast Fourier Transform, fast fourier transform) module 110, digital demodulation blocks 111, parallel/serial converting unit 112.
The defect of tradition SLM method is: in order to obtain good PAPR rejection, usually need to carry out IFFT conversion to multiple alternative signal, and therefrom select one to be used for transmitting, the computation complexity of algorithm sharply increases; And in order to make system can recover primary signal at receiving terminal, need to transmit the secondary information of certain sideband, the transmission of the secondary information of sideband reduces the spectrum utilization efficiency of system.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, a kind of frequency domain autocorrelation matching system and method reducing the peak-to-average power ratio of ofdm system is provided, by frequency domain sequence being converted to autocorrelation signal the Information Embedding of rotatable phase sequence in the autocorrelation of frequency domain autocorrelation signal, just primary signal can be recovered without the need to transmitting the secondary information of sideband, improving spectrum utilization efficiency.
For achieving the above object, the present invention reduces the frequency domain autocorrelation matching system of the peak-to-average power ratio of ofdm system, it is characterized in that comprising:
Rotatable phase sequencer is the rotatable phase sequence P of N for generation of M length m, m=1,2 ..., M, and send this M rotatable phase sequence to the multiplier of transmitter and the multiplier of receiver;
Serial/parallel conversion module, for being changed to original serial data circulation the parallel data stream comprising N number of subcarrier;
Digital modulation module, for carrying out digital modulation to parallel data stream, obtains frequency domain sequence S;
Autocorrelation signal generator, for carrying out auto-correlation computation to frequency domain sequence S, produces frequency domain autocorrelation signal X;
Multiplier, for by frequency domain autocorrelation signal X respectively with M rotatable phase sequence P mcarry out dot product, obtain M alternate transmission frequency domain sequence X m;
IFFT module, for by M alternate transmission frequency domain sequence X mconvert alternate transmission time domain sequences x to m;
Best PAPR selector, for from M alternate transmission time domain sequences x min select the minimum time domain sequences of PAPR
D/A modular converter, for by time domain sequences convert analog signal to;
Radiofrequency emitting module, transmits for analog signal is emitted to channel;
Receiver Module, for receiving the analog signal of coming from transmission;
A/D modular converter, for converting the analog signal of reception to time domain sequences y;
FFT module, for converting time domain sequences y to frequency domain sequence Y;
Multiplier, for calculating M the rotatable phase sequence P that rotatable phase sequencer in frequency domain sequence Y and transmitter sends mdot product output signal Y m;
Autocorrelation signal adaptation, for calculating M output signal Y mautocorrelation, select the output signal that autocorrelation value is maximum
Autocorrelation signal generator inverse transform module, for output signal carry out auto-correlation inverse transformation, recover frequency domain sequence;
Digital demodulation blocks, obtains parallel data stream for carrying out demodulation to the frequency domain sequence recovered;
Parallel/serial modular converter, for converting parallel data stream to serial data signal.
Wherein, digital modulation module is QAM(Quadrature Amplitude Modulation, quadrature amplitude modulation) modulation module, digital demodulation blocks is QAM demodulation module.
Wherein, digital modulation module is PSK(Phase Shift Keying, phase-modulation) modulation module, digital demodulation blocks is PSK demodulation module.
Wherein, K dimension transfer function G (z) of autocorrelation signal generator is:
G(z)＝a 0+a 1z -1+...+a K-1z -(K-1)
Wherein, a k, 0≤k≤K-1 represents that the kth of autocorrelation signal generator maintains number, z -krepresent transfer operation backward.
For achieving the above object, the present invention reduces the frequency domain autocorrelation matching method of the peak-to-average power ratio of ofdm system, it is characterized in that comprising the following steps:
(1), when transmitter and receiver are initially installed, rotatable phase sequencer is adopted to generate M rotatable phase sequence P m=[P m1, P m2..., P mN], m=1,2 ..., M, M are arranged by user, and this M rotatable phase sequence transmission are stored to transmitter and receiver;
(2), original serial data signal obtains parallel data stream through serial/parallel conversion by transmitter, and parallel data stream comprises N number of subcarrier, carries out digital modulation obtain frequency domain sequence S=[S to parallel data stream 1, S 2..., S n];
(3) the frequency domain autocorrelation signal X=[X of frequency domain sequence S, is generated 1, X 2..., X n];
(4) frequency domain autocorrelation signal X and M rotatable phase sequence P, is calculated respectively mdot product, obtain M alternate transmission frequency domain sequence X m:
X m＝X⊙P m＝[X 1P m1,X 2P m2,…,X NP mN]
By M alternate transmission frequency domain sequence X malternate transmission frequency domain sequence x is obtained by IFFT conversion m:
x m＝IFFT(X m)＝IFFT(X⊙P m)；
(5), the PAPR of M alternate transmission frequency domain sequence is calculated, the frequency domain sequence that selection PAPR is minimum be converted into analog signal and transmit through radio-frequency channel;
(6), receiver receives the signal that transmits of channel and is converted into digital signal y:
y = x m * + n ;
Wherein, n is interchannel noise;
FFT conversion is carried out to digital signal y, obtains frequency domain sequence Y:
Y = FFT ( y ) = X m * + FFT ( n ) ;
(7), a frequency domain sequence Y and M rotatable phase sequence P is calculated respectively mdot product, obtain M output signal Y m:
Y m＝Y⊙P m
Calculate each output signal Y mautocorrelation value, what wherein autocorrelation value was maximum be needs the frequency domain autocorrelation signal X that recovers;
(8), by the frequency domain autocorrelation signal X recovered carry out autocorrelation signal inverse transformation, obtain frequency domain sequence S;
(9), digital demodulation is carried out to the frequency domain sequence S recovered obtain parallel data stream, parallel data stream is carried out parallel/serial conversion and recovers original serial data stream.
Wherein, the digital modulation in step (2) is QAM modulation, and the digital demodulation in step (9) is QAM demodulation.
Wherein, the digital modulation in step (2) is PSK modulation, and the digital demodulation in step (9) is PSK demodulation.
Wherein, step (3) frequency domain autocorrelation signal produces generation employing K dimension transfer function G (z)=a of X 0+ a 1z -1+ ...+a k-1z -(K-1), wherein, a k, 0≤k≤K-1 represents that the kth of autocorrelation signal generator maintains number, z -krepresent transfer operation backward.
Goal of the invention of the present invention is achieved in that
The present invention reduces the frequency domain autocorrelation matching system and method for the peak-to-average power ratio of ofdm system, transmitter generates the autocorrelation signal of frequency domain sequence, then SLM method is traditionally carried out processing to frequency domain autocorrelation signal and is transmitted, M rotatable phase sequence in Received signal strength and transmitter rotatable phase sequencer is done point multiplication operation and is obtained M and output signal by receiver, respectively auto-correlation computation is carried out to this M output signal, signal maximum for wherein autocorrelation value is recovered frequency domain sequence through autocorrelation signal generator inverse transform module, just original serial data stream can be recovered again through demodulation and parallel/serial conversion.
The present invention by the middle of the Information Embedding of rotatable phase sequence to the autocorrelation of frequency domain autocorrelation signal, utilize Received signal strength and rotatable phase sequence dot product gained to the autocorrelation of output signal to recover primary signal, without the need to the transmission of the secondary information of sideband.
Accompanying drawing explanation
Fig. 1 is the communication system frame diagram of the peak-to-average power ratio reducing ofdm system based on traditional SLM method;
Fig. 2 is a kind of embodiment system framework of frequency domain autocorrelation matching system figure that the present invention reduces the peak-to-average power ratio of ofdm system.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described, so that those skilled in the art understands the present invention better.Requiring particular attention is that, in the following description, when perhaps the detailed description of known function and design can desalinate main contents of the present invention, these are described in and will be left in the basket here.
Embodiment
Fig. 2 is a kind of embodiment system framework of frequency domain autocorrelation matching system figure that the present invention reduces the peak-to-average power ratio of ofdm system.As shown in Figure 2, the frequency domain autocorrelation matching system that the present invention reduces the peak-to-average power ratio of ofdm system comprises rotatable phase sequencer, transmitter and receiver three part, wherein:
Rotatable phase sequencer 201 is the rotatable phase sequence P of N for generation of M length m, m=1,2 ..., M, and this M rotatable phase sequence is sent to multiplier 205 and multiplier 213.
Transmitter comprises:
Serial/parallel conversion module 202, for being changed to original serial data circulation the parallel data stream comprising N number of subcarrier.
Digital modulation module 203, for carrying out digital modulation to parallel data stream, obtains frequency domain sequence S=[S 1, S 2..., S n].
Autocorrelation signal generator 204, for carrying out auto-correlation computation to frequency domain sequence S, produces frequency domain autocorrelation signal X=[X 1, X 2..., X n].
Multiplier 205, for by frequency domain autocorrelation signal X respectively with M rotatable phase sequence P mcarry out dot product, obtain M alternate transmission frequency domain sequence X m.
IFFT module 206, for by M alternate transmission frequency domain sequence X mconvert alternate transmission time domain sequences x to m.
Best PAPR selector 207, for from M alternate transmission time domain sequences x min select the minimum time domain sequences of PAPR
D/A modular converter 208, for by time domain sequences convert analog signal to.
Radiofrequency emitting module 209, transmits for analog signal is emitted to channel.
Receiver comprises:
Receiver Module 210, for receiving the analog signal of coming from transmission.
A/D modular converter 211, for converting the analog signal of reception to time domain sequences y.
FFT module 212, for converting time domain sequences y to frequency domain sequence Y.
Multiplier 213, for calculating M the rotatable phase sequence P that rotatable phase sequencer 204 in frequency domain sequence Y and transmitter sends mdot product output signal Y m.
Autocorrelation signal adaptation 214, for calculating M output signal Y mautocorrelation, select the output signal that autocorrelation value is maximum
The K of autocorrelation signal generator ties up transfer function G (z) and can be expressed as:
G(z)＝a 0+a 1z -1+...+a K-1z -(K-1)
Wherein, a k, 0≤k≤K-1 represents that the kth of autocorrelation signal generator maintains number, z -krepresent transfer operation backward.
Autocorrelation signal generator inverse transform module 215, for output signal carry out auto-correlation inverse transformation, recover frequency domain sequence.
Digital demodulation blocks 216, obtains parallel data stream for carrying out demodulation to the frequency domain sequence recovered.
Parallel/serial modular converter 217, for converting parallel data stream to serial data signal.
In actual applications, digital modulation module can select QAM modulation module, PSK modulation module, and correspondingly, digital demodulation blocks is QAM demodulation module, PSK demodulation module.
The frequency domain autocorrelation matching system that the present invention reduces the peak-to-average power ratio of ofdm system comprises the following steps:
Step 1: adopt rotatable phase sequencer to generate M rotatable phase sequence P m=[P m1, P m2..., P mN], m=1,2 ..., M, M are arranged by user, and this M rotatable phase sequence transmission are stored to transmitter and receiver;
The generation of rotatable phase sequence is only carried out when transmitter and receiver is initially installed, and transmitter and receiver are by M time-domain-random-sequence q istore, directly use when normal signal launching and receiving.
Step 2: original serial data signal is obtained parallel data stream through serial/parallel conversion by transmitter, parallel data stream comprises N number of subcarrier.
Step 3: digital modulation is carried out to parallel data stream and obtains frequency domain sequence S=[S 1, S 2..., S n].
Step 4: the frequency domain autocorrelation signal X=[X generating frequency domain sequence S 1, X 2..., X n].
Step 5: calculate frequency domain autocorrelation signal X and M rotatable phase sequence P respectively mdot product, obtain M alternate transmission frequency domain sequence X m:
X m＝X⊙P m＝[X 1P m1,X 2P m2,…,X NP mN]
M alternate transmission frequency domain sequence X min the signal message that comprises identical.
Step 6: by M alternate transmission frequency domain sequence X malternate transmission frequency domain sequence x is obtained by IFFT conversion m:
x m＝IFFT(X m)＝IFFT(X⊙P m)。
Step 7: calculate M alternate transmission time domain sequences x mpAPR, select the time domain sequences that PAPR is minimum
Step 8: by time domain sequences be converted to analog signal and transmit through radio-frequency channel.
Step 9: the signal that receiver reception channel transmits also is converted to digital signal y:
y = x m * + n ;
Wherein, n is interchannel noise.
Step 10: carry out FFT conversion to digital signal y, obtains frequency domain sequence Y:
Y = FFT ( y ) = X m * + FFT ( n ) .
Step 11: calculate a frequency domain sequence Y and M rotatable phase sequence P respectively mdot product, obtain M output signal Y m:
To output signal Y mcarry out autocorrelation analysis:
Because interchannel noise n has randomness, FFT conversion belongs to linear transformation, and the autocorrelation of n'=FFT (n) meets:
r n ′ ( τ ) = 1 , τ = 0 0 , τ ≠ 0
Wherein, τ represents the time of delay of signal;
The K of autocorrelation signal generator ties up transfer function G (z) and can be expressed as:
G(z)＝a 0+a 1z -1+...+a K-1z -(K-1)
Wherein, a k, 0≤k≤K-1 represents that the kth of autocorrelation signal generator maintains number, z -krepresent transfer operation backward, such as: z -1s (t)=s (t-1).
Due to rotatable phase sequence P mthere is pseudo-randomness, therefore X m=X ⊙ P mautocorrelation peak can not be very large, its autocorrelation value meets in theory:
Wherein, K represents the dimension of autocorrelation signal generator, a krepresent that the K of autocorrelation signal generator maintains number.
Receiver can according to the frequency-region signal received the size of autocorrelation value judge and recover autocorrelation signal X.If the autocorrelation value of the frequency-region signal Y received is 0, its correspondence known be not the autocorrelation signal X of transmitting terminal.In practical situations both, because data length can not be endless, the autocorrelation peak of Received signal strength has certain deviation.But still can be judged and recover the autocorrelation signal X of transmitting terminal by the autocorrelation peak of Received signal strength.
Calculate a frequency domain sequence Y and M rotatable phase sequence P mdot product output signal Y m:
Known and if only if send signal corresponding phase sequence with output signal Y mmiddle taken advantage of phase sequence P mtime identical, Y mcan in τ=0,1 ..., during K, obtain maximum autocorrelation value.
Step 12: calculate M output signal Y mautocorrelation value, what wherein autocorrelation value was maximum be needs the frequency domain autocorrelation signal X that recovers.
Step 13: the frequency domain autocorrelation signal X recovered is carried out autocorrelation signal inverse transformation, obtains frequency domain sequence S.
Step 14: digital demodulation is carried out to the frequency domain sequence S recovered and obtains parallel data stream.
Step 15: the parallel data stream recovered is carried out parallel/serial conversion, recovers original serial data stream.
In actual applications, digital modulation can select QAM modulation, PSK to modulate, and correspondingly, digital demodulation adopts QAM demodulation, PSK demodulation.
The present invention reduces the frequency domain autocorrelation matching system and method for the peak-to-average power ratio of ofdm system, in the middle of the Information Embedding of rotatable phase sequence to the autocorrelation of frequency domain autocorrelation signal, according to Received signal strength and rotatable phase sequence of points multiplied to the peak value of autocorrelation value of output signal determine the autocorrelation signal that need recover, thus carry out signal recuperation, the transmission of the secondary information of sideband is carried out without the need to taking additional band.
Although be described the illustrative embodiment of the present invention above; so that those skilled in the art understand the present invention; but should be clear; the invention is not restricted to the scope of embodiment; to those skilled in the art; as long as various change to limit and in the spirit and scope of the present invention determined, these changes are apparent, and all innovation and creation utilizing the present invention to conceive are all at the row of protection in appended claim.

Claims (8)

1. reduce a frequency domain autocorrelation matching system for the peak-to-average power ratio of ofdm system, it is characterized in that comprising:
Rotatable phase sequencer (201) is the rotatable phase sequence P of N for generation of M length m, m=1,2 ..., M, and this M rotatable phase sequence is sent respectively to the first multiplier (205) and the second multiplier (213);
Serial/parallel conversion module (202), for being changed to parallel data stream by original serial data circulation;
Digital modulation module (203), for carrying out digital modulation to parallel data stream, obtains frequency domain sequence S;
Autocorrelation signal generator (204), for carrying out auto-correlation computation to frequency domain sequence S, produces frequency domain autocorrelation signal X;
First multiplier (205), for by frequency domain autocorrelation signal X respectively with M rotatable phase sequence P mcarry out dot product, obtain M alternate transmission frequency domain sequence X m;
IFFT module (206), for by M alternate transmission frequency domain sequence X mconvert alternate transmission time domain sequences x to m;
Best PAPR selector (207), for from M alternate transmission time domain sequences x min select the minimum time domain sequences of PAPR
D/A modular converter (208), for by time domain sequences convert analog signal to;
Radiofrequency emitting module (209), transmits for analog signal is emitted to channel;
Receiver Module (210), for receiving the analog signal of coming from transmission;
A/D modular converter (211), for converting the analog signal of reception to time domain sequences y;
FFT module (212), for converting time domain sequences y to frequency domain sequence Y;
Second multiplier (213), for calculating M the rotatable phase sequence P that frequency domain sequence Y and rotatable phase sequencer (201) send mdot product output signal Y m;
Autocorrelation signal adaptation (214), for calculating M output signal Y mautocorrelation, select the output signal that autocorrelation value is maximum
Autocorrelation signal generator inverse transform module (215), for output signal carry out auto-correlation inverse transformation, recover frequency domain sequence;
Digital demodulation blocks (216), obtains parallel data stream for carrying out demodulation to the frequency domain sequence recovered;
Parallel/serial modular converter (217), for converting parallel data stream to serial data signal.
2. the frequency domain autocorrelation matching system of the peak-to-average power ratio of reduction ofdm system according to claim 1, is characterized in that, described digital modulation module is QAM modulation module, and described digital demodulation blocks is QAM demodulation module.
3. the frequency domain autocorrelation matching system of the peak-to-average power ratio of reduction ofdm system according to claim 1, is characterized in that, described digital modulation module is PSK modulation module, and described digital demodulation blocks is PSK demodulation module.
4. the frequency domain autocorrelation matching system of the peak-to-average power ratio of reduction ofdm system according to claim 1, is characterized in that the K of described autocorrelation signal generator ties up transfer function G (z) and is: G (z)=a 0+ a 1z -1+ ...+a k-1z -(K-1), wherein, a k, 0≤k≤K-1, represents that the kth of autocorrelation signal generator maintains number, z -krepresent transfer operation backward.
5. reduce a frequency domain autocorrelation matching method for the peak-to-average power ratio of ofdm system, it is characterized in that, comprise the following steps:
(1), when transmitter and receiver are initially installed, rotatable phase sequencer is adopted to generate M rotatable phase sequence P m=[P m1, P m2..., P mN], m=1,2 ..., M, M are arranged by user, and this M rotatable phase sequence transmission are stored to transmitter and receiver;
(2), original serial data signal obtains parallel data stream through serial/parallel conversion by transmitter, and parallel data stream comprises N number of subcarrier, carries out digital modulation obtain frequency domain sequence S=[S to parallel data stream 1, S 2..., S n];
(3) the frequency domain autocorrelation signal X=[X of frequency domain sequence S, is generated 1, X 2..., X n];
(4) frequency domain autocorrelation signal X and M rotatable phase sequence P, is calculated respectively mdot product, obtain M alternate transmission frequency domain sequence X m:
X m＝X⊙P m＝[X 1P m1,X 2P m2,…,X NP mN]
By M alternate transmission frequency domain sequence X malternate transmission frequency domain sequence x is obtained by IFFT conversion m:
x m＝IFFT(X m)＝IFFT(X⊙P m)；
(5), the PAPR of M alternate transmission frequency domain sequence is calculated, the frequency domain sequence that selection PAPR is minimum be converted into analog signal and transmit through radio-frequency channel;
(6), receiver receives the signal that transmits of channel and is converted into digital signal y:
Wherein, n is interchannel noise;
FFT conversion is carried out to digital signal y, obtains frequency domain sequence Y:
(7), a frequency domain sequence Y and M rotatable phase sequence P is calculated respectively mdot product, obtain M output signal Y m:
Y m＝Y⊙P m；
Calculate each output signal Y mautocorrelation value, what wherein autocorrelation value was maximum be needs the frequency domain autocorrelation signal X that recovers;
(8), by the frequency domain autocorrelation signal X recovered carry out autocorrelation signal inverse transformation, obtain frequency domain sequence S;
(9), digital demodulation is carried out to the frequency domain sequence S recovered obtain parallel data stream, parallel data stream is carried out parallel/serial conversion and recovers original serial data stream.
6. the frequency domain autocorrelation matching method of the peak-to-average power ratio of reduction ofdm system according to claim 5, it is characterized in that, digital modulation in described step (2) is QAM modulation, and the digital demodulation in described step (9) is QAM demodulation.
7. the frequency domain autocorrelation matching method of the peak-to-average power ratio of reduction ofdm system according to claim 5, it is characterized in that, digital modulation in described step (2) is PSK modulation, and the digital demodulation in described step (9) is PSK demodulation.
8. the frequency domain autocorrelation matching method of the peak-to-average power ratio of reduction ofdm system according to claim 5, is characterized in that described frequency domain autocorrelation signal produces generation employing K dimension transfer function G (z)=a of X 0+ a 1z -1+ ...+a k-1z -(K-1), wherein, a k, 0≤k≤K-1, represents that the kth of autocorrelation signal generator maintains number, z -krepresent transfer operation backward.
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020150036A1 (en) * 2001-02-16 2002-10-17 Vijitha Weerackody Peak-to-average power reduction in an Orthogonal Frequency Division Multiplexing system
CN1666452A (en) * 2002-07-08 2005-09-07 三星电子株式会社 Apparatus and method for transmitting and receiving side information about selective mapping in an orthogonal frequency division multiplexing communication system
CN101848184A (en) * 2010-06-03 2010-09-29 山东大学 Selective mapping scrambling method for reducing peak-to-average power ratio of orthogonal frequency division multiplexing system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20020150036A1 (en) * 2001-02-16 2002-10-17 Vijitha Weerackody Peak-to-average power reduction in an Orthogonal Frequency Division Multiplexing system
CN1666452A (en) * 2002-07-08 2005-09-07 三星电子株式会社 Apparatus and method for transmitting and receiving side information about selective mapping in an orthogonal frequency division multiplexing communication system
CN101848184A (en) * 2010-06-03 2010-09-29 山东大学 Selective mapping scrambling method for reducing peak-to-average power ratio of orthogonal frequency division multiplexing system

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
降低OFDM峰均功率比技术综述;郭岭，郭振民;《现代电子技术》;20021130(第142期);59-61 *

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