CN108055225A - OFDM system peak power optimization method based on block interleaving and transmission system thereof - Google Patents

OFDM system peak power optimization method based on block interleaving and transmission system thereof Download PDF

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CN108055225A
CN108055225A CN201711295040.3A CN201711295040A CN108055225A CN 108055225 A CN108055225 A CN 108055225A CN 201711295040 A CN201711295040 A CN 201711295040A CN 108055225 A CN108055225 A CN 108055225A
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candidate
module
mapping
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CN108055225B (en
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王灵垠
李念强
赵越
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济南大学
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems
    • H04L27/26Systems using multi-frequency codes
    • H04L27/2601Multicarrier modulation systems
    • H04L27/2614Peak power aspects

Abstract

The invention discloses an OFDM system peak power optimization method based on block interleaving and a transmission system thereof. The OFDM system peak power optimization method comprises the stepsof: generating a binary sequence by utilizing a binary random sequence generator module, and mapping the binary sequence into a base band frequency domain signal sequence SA and a base band frequencydomain signal sequence SB respectively by utilizing a mapping A module and a mapping B module; respectively carrying out blocking processing on the base band frequency domain signal sequences SA and SB to obtain sequences XA and XB after blocking processing; carrying out repeated block interleaving on the XA and the XB which are obtained after blocking processing to obtain a plurality of differentsequences Ai and Bj; respectively carrying out IFFT (Inverse Fast Fourier Transform) on the plurality of different sequences Ai and Bj to obtain a plurality of different candidate signals ai and bj,i.e., a first part of candidate signals; carrying out adding and amplitude weighting processing on a plurality of different candidate signals ai and bj in the first part of candidate signals to obtaina plurality of new candidate signals, i.e., a second part of candidate signals; and from all the candidate signals, selecting a candidate signal with the minimum PAPR value to carry out transmission.

Description

基于块交织的OFDM系统峰值功率优化方法及其发射系统 Based on the peak power optimization block interleaving method and system of the OFDM transmission system

技术领域 FIELD

[0001] 本发明涉及数字通信技术领域,具体涉及一种基于块交织的OFDM系统峰值功率优化方法及其发射系统。 [0001] The present invention relates to the technical field of digital communications, particularly to a peak power of an OFDM system and the transmission system optimization method based on block interleaving.

背景技术 Background technique

[0002] 正交频分复用作为多载波调制技术的代表,由于其具有高速的数据传输率,并能对抗频率选择性衰落,已被应用到无线通信的很多领域。 [0002] Orthogonal frequency division multiplexing as a representative multi-carrier modulation technique, due to its high data transmission rate, and can combat frequency selective fading, has been applied to many fields of wireless communications. 虽然OFDM技术具有很多优势,但也存在明显不足,峰值功率问题一直是该技术的主要缺陷之一。 While OFDM technology has many advantages, but there are obviously insufficient, the peak power problem has been one of the major flaws of the technology. 过高的峰值功率会导致OFDM 信号发生畸变,进而导致系统性能恶化。 It can cause high peak power of the OFDM signal is distorted, leading to deterioration of system performance. 因此,峰值功率问题一直是OFDM技术实用化的最大障碍之一。 Therefore, the peak power problem has been one of the biggest obstacles OFDM technology practical.

[0003] 对于OFDM系统,输入的二进制比特序列需要先进行映射,映射的方式主要有相移键控(Phase Shift Keying,PSK)或者正交幅度调制(Quadrature Amplitude Modulation, QAM),经串并转换后,将所获得的并行传输信号分别调制到相互正交的子载波上,最后将这些经过调制的子载波信号叠加起来生成OFDM信号。 [0003] For an OFDM system, the input sequence of binary bits need to be mapped, mainly mapped phase shift keying (Phase Shift Keying, PSK) or quadrature amplitude modulation (Quadrature Amplitude Modulation, QAM), via serial-parallel converter after the parallel transmission signals obtained are modulated onto subcarriers orthogonal to each other, the last of these modulated sub-carrier signals are superimposed to generate an OFDM signal.

[0004] 对于一个具有N个子载波的OFDM系统,在一个信号周期内,其基带信号可表示为 [0004] For an OFDM system having N subcarriers, a signal period in which the baseband signal can be expressed as

[0005] [0005]

Figure CN108055225AD00041

[0006] 其中,Xk,k = 0,l,…,NI是,由输入的二进制序列经PSK或QAM后得到的信号,χη,η =0,1,…,N-1表示经OFDM调制后的输出信号。 [0006] wherein, Xk, k = 0, l, ..., NI, the input signal from the binary sequence after PSK or QAM obtained, χη, η = 0,1, ..., N-1 represents the OFDM modulated the output signals.

[0007] OFDM系统的输出信号是由若干个子载波信号叠加而成的,当多个子载波信号的相位相似时,所得的OFDM输出信号将具有非常大的峰值功率;尤其是当子载波数量较大时,峰值功率问题会更加严重。 The output signal of [0007] OFDM system is the superposition of several sub-carrier signal obtained by, when the phase of a plurality of similar sub-carrier signals, the resultant OFDM signals having a very high output peak power; especially when a large number of subcarriers when peak power problem will become more serious.

[0008] 关于OFDM系统的峰值功率问题,通常用峰均功率比(Peak-to-Average Power Ratio,PAPR)来加以描述,该参量可描述OFDM信号峰值功率的变化情况,其定义为在一个OFDM信号周期内,该信号的峰值功率与其平均功率的比值,可表示为 [0008] The peak power issue OFDM system, usually PAPR (Peak-to-Average Power Ratio, PAPR) to be described, the parameter may describe the change of the OFDM signal peak power, which is defined as an OFDM signal period and its average power ratio of the peak power of the signal can be expressed as

[0009] [0009]

Figure CN108055225AD00042

[0010] 其中,E{ · }表示数学期望运算,X= [Χ0,Χ1,···,ΧΝ-1]Τ。 [0010] wherein, E {·} denotes the mathematical expectation operator, X = [Χ0, Χ1, ···, ΧΝ-1] Τ.

[0011] 关于OFDM系统的PAPR性能,通常用互补累积分布函数(Complementary Cumulative Distribution Function,C(DF)来加以描述,其含义是用超过某一确定PAPR值的概率来表示该随机变量的统计分布特性,即该系统的PAPR性能,其表达式为 [0011] PAPR performance with respect to the OFDM system, typically with a complementary cumulative distribution function (Complementary Cumulative Distribution Function, C (DF) to be described, which means that the probability exceeds a PAPR value is determined to represent a statistical distribution of the random variable properties, i.e., PAPR performance of the system, its expression is

[0012] [0012]

Figure CN108055225AD00043

[0013] 其中,N为子载波数,PAPRo表示某一确定的PAPR值。 [0013] where, N is a number of subcarriers, PAPRo represents a PAPR value is determined.

[0014] 近年来,如何有效地优化OFDM系统的峰值功率问题一直是研究的热点问题。 [0014] In recent years, how to effectively optimize the OFDM system peak power issue has been a hot issue. 一些较有参考价值的峰值功率优化方法被提出,如限幅、编码、压缩扩张和多信号表示方法等。 Some optimization methods peak power than a reference value is presented, such as clipping, coding, compression and expansion of multiple signal representation methods. 但是,这些方法都存在着不同程度的缺陷。 However, these methods have different degrees of impairment. 限幅方法会使信号产生失真,并且频谱带外失真较大。 The method of clipping distortion causes signal, and the larger the spectral band distortion. 编码方法降低PAPR的效果非常好,但可供使用的编码图样数量非常少,特别是当子载波数量较大时,编码效率非常低。 PAPR reduction coding method is very good, but the number of available code pattern is very small, particularly when a large number of subcarriers, the coding efficiency is very low. 多信号表示方法,即在发送端,通过采用不同的线性处理方式,用多个候选信号表示同一输入序列,并根据一定的选优原则从中选择PAPR值最小的候选信号进行传输;同时,发送端还需要发送附加信息到接收端,帮助其恢复原始输入数据;这类方法的缺点便是计算复杂度大和需要附加信息。 Multiple signal representation, i.e., at the transmitting end, by using different linear approach, with the same input signal represents a plurality of candidate sequences, and select the value of the minimum PAPR candidate signal transmitted according to certain principles preferably selected from the group; the same time, the transmitting end also you need to send additional information to the receiving end, to help restore the original input data; disadvantage of such methods is computational complexity Japanese additional information is required.

[0015] 块交织就是一种简单而有效的多信号表示类方法,其基本原理是映射后的数据序列进行分块处理,然后将各个子块进行重新排列并进行OFDM调制获得候选信号,最后从全部的候选信号中选择PAPR值最小的信号进行传输。 [0015] Block interleaving is a simple and effective method for the multi-signal indicates the class, which is the basic principle of the mapping data sequence into blocks, and then each subblock are rearranged and OFDM modulation signal obtained candidate, from the last selecting a minimum PAPR values ​​of all candidate signal transmitted signal. 由于每产生一个候选信号都需要一次快速傅立叶反变换(Inverse Fast Fourier Transform,IFFT)来实现OFDM调制,计算复杂度非常大,这也成为实现该方法的最大障碍之一。 Since each candidate signal a need to produce a Fast Fourier Transform (Inverse Fast Fourier Transform, IFFT) to realize the OFDM modulation, the computational complexity is very large, this has become one of the biggest obstacles to the realization of the method.

[0016] 综上所述,现有技术中对于采用二进制相移键控(Binary PSK,BPSK)映射方式的OFDM系统,针对现有块交织方法计算复杂度非常大的问题,尚缺乏有效的解决方案。 [0016] In summary, the prior art for the use of binary phase shift keying (Binary PSK, BPSK) mapping manner OFDM systems, the computational complexity very big problem for the conventional block interleaving method, no effective solution to Program.

发明内容 SUMMARY

[0017] 为了克服上述现有技术的不足,本发明提供了一种基于块交织的OFDM系统峰值功率优化方法及其发射系统,具有计算复杂度较低、PAPR性能较好且能满足实际应用要求等优点。 [0017] In order to overcome the disadvantages of the prior art, the present invention provides a peak power optimization method and system OFDM transmission system based on block interleaving, with a lower computational complexity, better PAPR performance can meet the requirements of practical application Etc. .

[0018] 本发明所采用的技术方案是: [0018] The technical proposal of the present invention is:

[0019] —种基于块交织的OFDM系统峰值功率优化方法,包括以下步骤: [0019] - species peak power optimization based on block interleaving OFDM system, comprising the steps of:

[0020] 利用二进制随机序列发生器模块产生二进制序列,并分别利用映射A模块和映射B 模块将二进制序列映射为基带频域信号序列Sa和基带频域信号序列Sb; [0020] using a random binary sequence generator module generates a binary sequence, using the map A respectively B module and a mapping module maps the binary sequence to a baseband frequency-domain signal sequences Sa and baseband frequency-domain signal sequences Sb;

[0021] 将基带频域信号序列Sa和基带频域信号序列Sb分别进行分块处理,得到分块处理后的序列Xa和Xb; [0021] The frequency-domain baseband signal sequences Sa and baseband signal frequency-domain sequence into blocks Sb respectively, to obtain the sequence of Xa and Xb into blocks;

[0022] 将分块处理后得到的序列Xa和序列Xb进行多次块交织,得到若干个不同的序列A1 和序列Bj; [0022] After process block sequence obtained Xa and Xb multiple block interleaving sequence to obtain a plurality of different sequence A1 and a sequence of Bj;

[0023] 对若干个不同的序列A1和序列分别进行快速傅里叶反变换IFFT,得到多个不同的候选信号ai和候选信号bj,即第一部分候选信号; [0023] The number of different sequence A1 and sequence respectively inverse fast Fourier transform IFFT, to obtain a plurality of candidate signals of different candidate signal ai and bj, i.e., a first portion of the candidate signal;

[0024] 将第一部分候选信号中的候选信号ai和候选信号bj进行相加和幅度加权处理,得到多个新的候选信号,即第二部分候选信号; [0024] The first portion of the candidate signal of the candidate signal and the candidate signals ai and bj amplitude weighting processing for adding, to obtain a new plurality of candidate signal, i.e., the second part of the candidate signal;

[0025] 从全部的候选信号中,选择PAPR值最小的候选信号进行传输。 [0025] From all of the candidate signal, the value of the minimum PAPR is selected for transmission candidate signal.

[0026] 进一步的,所述利用二进制随机序列发生器模块产生二进制序列,包括: [0026] Further, the use of random binary sequence generator module generates a binary sequence, comprising:

[0027] 确定OFDM系统和优化方法的相关参数,相关参数包括子载波数N、BPSK映射方式、 分块数W及相位加权因子集合; [0027] The determination and optimization of the OFDM system parameters, the parameters including the number of subcarriers N, BPSK mapping manner, phase and block number of the weighting factor W set;

[0028] 根据子载波数N和所采用的BPSK映射方式,利用二进制随机序列发生器模块产生二进制序列,将该二进制序列同时送入映射A模块和映射B模块。 [0028] The sub-carrier number N and the BPSK mapping scheme employed, the binary random sequence generator module generates a binary sequence, the binary sequence while feeding A mapping module and a mapping module B.

[0029] 进一步的,所述分别利用映射A模块和映射B模块将二进制序列映射为基带频域信号序列Sa和基带频域信号序列SB,包括: [0029] Further, the use of the map A respectively B module and a mapping module maps the binary sequence to a baseband signal frequency-domain sequence and a frequency-domain signal Sa SB baseband sequence, comprising:

[0030] 映射A模块采用BPSK映射星座图A将二进制序列映射为基带频域信号序列Sa; [0030] A mapping module uses BPSK constellation mapping A binary sequence is mapped to a baseband frequency-domain signal sequences Sa;

[0031] 映射B模块采用BPSK映射星座图B将二进制序列映射为基带频域信号序列Sb; [0031] mapping module B B using BPSK constellation mapping binary sequence is mapped to a baseband frequency-domain signal sequences Sb;

[0032] 其中,BPSK映射星座图A的映射原则是比特0映射为1,比特1映射为-I ;BPSK映射星座图B的映射原则是比特0映射成i,比特1映射为-i。 [0032] wherein mapping principles BPSK constellation mapping A 0 bit is mapped to 1, bit 1 is mapped -I; mapping principles BPSK constellation mapping B is mapped into bit 0 i, is mapped to bit 1 -i.

[0033] 进一步的,所述将基带频域信号序列Sa和基带频域信号序列Sb分别进行分块处理, 得到分块处理后的序列Xa和Xb,包括: [0033] Further, the baseband signal frequency-domain sequence with a frequency-domain base Sa and Sb are signal sequences into blocks, to obtain the sequence into blocks Xa and Xb, comprising:

[0034] 采用相邻分割的方式将基带频域信号序列Sa和基带频域信号序列Sb分别进行分块处理,得到分块处理后的序列Xa和序列Xb。 [0034] The adjacent division manner baseband frequency-domain signal sequences Sa and baseband signal frequency-domain sequence into blocks Sb respectively, to obtain sequence Xa and Xb sequence after the block process.

[0035] 进一步的,所述将分块处理后得到的序列Xa和Xb进行多次块交织,得到若干个不同的序列Ai和序列Bj,包括: [0035] Further, after the obtained sequences into blocks Xa and Xb multiple block interleaving, to obtain a plurality of different sequences of Bj Ai and sequence, comprising:

[0036] 将分块处理后得到的序列Xa和序列Xb中的各个子块进行重新排序,得到新排序的若干个不同的序列A1和序列叫。 [0036] The sequences of each subblock sequences Xa and Xb obtained post-processing block in the reordering obtain several different sequences A1 and sequence-ordered call.

[0037] 进一步的,所述将第一部分候选信号中的候选信号ai和候选信号bj进行相加和幅度加权处理,得到多个新的候选信号,即第二部分候选信号,包括: [0037] Further, the candidate signals ai and bj candidate signal in a first part of the candidate signal and amplitude weighting are summed to give a new plurality of candidate signals, i.e., the second part of the candidate signals, comprising:

[0038] 将第一部分候选信号中的候选信号ai和候选信号bj进行相加; [0038] The first portion of the candidate signal of the candidate signal ai and bj for adding the candidate signal;

[0039] 对相加后的信号进行幅度加权处理,得到多个新的候选信号,即第二部分候选信号。 [0039] The summed signal is amplitude-weighted to give more new candidate signal, i.e., the second part of the candidate signals.

[0040] 进一步的,所述第二部分候选信号的表达式可表示为: [0040] Further, expression of the second part of the candidate signals may be expressed as:

[0041] [0041]

Figure CN108055225AD00061

[0042] 其中,Ai,i = 1,2,…,G和Bj,j = 1,2,…,H分别表示对分块处理后的序列Xa和序列Xb进行块交织后的序列;ai和匕为对分块处理后的序列Xa和Xb进行多次块交织并分别进行IFFT后得到的候选信号;G和H分别表不候选信号ai和候选信号bj的数量。 [0042] wherein, Ai, i = 1,2, ..., G and Bj, j = 1,2, ..., H represent the sequence of the sequence Xa and Xb sequence processing block after block interleaving; and AI dagger Xa and Xb for the sequence of the block and the processing block interleaving multiple candidate signal after IFFT were obtained; G and H respectively denote the number of candidate signals are not ai and bj of the candidate signals.

[0043] —种基于块交织的OFDM系统峰值功率优化方法的发射系统,包括: [0043] - Optimization of species peak power transmission system based on OFDM system block interleaving method, comprising:

[0044] 二进制随机序列发生器模块,用于产生二进制序列,并将其同时送入映射A模块和映射B模块; [0044] random binary sequence generator means for generating a binary sequence, and while the map A into B module and a mapping module;

[0045] 映射A模块,用于将二进制序列映射为基带频域信号序列SA,并将映射后的基带频域信号序列Sa送入分块模块; [0045] A mapping module, for mapping the binary sequence to a baseband signal frequency domain sequence SA, and the mapped frequency-domain baseband signal Sa into the sequence block module;

[0046] 映射B模块,用于将二进制序列映射为基带频域信号序列SB,并将映射后的基带频域信号序列Sb送入分块模块; [0046] B mapping module, for mapping the binary sequence to a baseband frequency-domain signal sequence SB, and the frequency-domain signal Sb mapped sequence into a baseband block module;

[0047] 分块模块,与多个块交织模块相连接,用于将映射后的基带频域信号序列Sa和Sb分为若干个子块序列,并发送至块交织模块; [0047] The partitioning module, a plurality of blocks and interleaving module is connected to the frequency-domain signal sequence mapped baseband Sa and Sb is divided into several sub-block sequence, and transmitted to the block interleaving module;

[0048] 块交织模块,用于将分块后得到的各个子块序列进行重新排列,并将重新排列后的序列送入IFFT模块; [0048] Block interleaving module, for each subblock obtained block sequence rearranged and rearranged into the sequence of IFFT modules;

[0049] IFFT模块,用于对重新排列后的子块序列进行快速傅里叶反变换IFFT,得到多个不同的候选信号&和候选信号匕,即第一部分候选信号,并将第一部分候选信号传输至候选信号处理模块和最优候选信号选择模块; [0049] IFFT module for sub-block sequence rearranged the IFFT inverse fast Fourier transform, to obtain a plurality of different candidate signal & amp; dagger and a candidate signal, i.e., a first candidate signal portion and a first portion of the candidate signal to the signal processing module and the candidate signal best candidate selection module;

[0050] 候选信号处理模块,用于将第一部分候选信号中的候选信号ai与候选信号h进行相加和幅度加权处理,产生多个新的候选信号,即第二部分候选信号; [0050] The signal processing module candidate, the candidate for the first signal part of the candidate signal h ai with candidate signal processing for amplitude weighting and adding, a plurality of new candidate signal, i.e., the second part of the candidate signal;

[0051] 最优候选信号选择模块,用于从所产生的全部候选信号中选出PAPR值最小的候选信号。 [0051] The best candidate signal selecting means for selecting a candidate value of the minimum PAPR signals from all the generated candidate signal.

[0052] 进一步的,所述映射A模块采用BPSK映射星座图A将二进制序列映射为基带频域信号序列Sa;所述映射B模块采用BPSK映射星座图B将二进制序列映射为基带频域信号序列SB。 [0052] Further, the mapping A module is BPSK-mapped constellation A binary sequence is mapped to a frequency domain signal sequence Sa baseband; the mapping B module is BPSK-mapped constellation B binary sequence is mapped to a baseband frequency-domain signal sequence SB.

[0053] 进一步的,所述IFFT模块的输出端分别与候选信号处理模块、最优候选信号选择模块相连接。 [0053] Further, the output of the IFFT module candidate signal processing module, respectively, the optimal selection module connected to the candidate signal.

[0054] 与现有技术相比,本发明的有益效果是: [0054] Compared with the prior art, the beneficial effects of the present invention are:

[0055] (1)本发明在信号映射阶段,采用两种不同的BPSK映射星座图对输入的二进制序列进行映射,为后续利用相加和幅度加权处理生成新的候选信号奠定基础;在对映射后的序列进行分块处理后,通过块交织模块进行多次块交织后,才进行IFFT变换,将分块后获得的各个子块进行重新排列,以获得不同的候选信号,即第一部分候选信号,提高了OFDM系统峰值功率优化精度; [0055] (1) In the present invention, a signal mapping stage, using two different binary BPSK constellation mapping of the input sequence are mapped, to generate a new basis for the subsequent use of the addition candidate signal and an amplitude weighting processing; in the mapping after the sequence into blocks, multiple block interleaved by block interleaver module only performs IFFT conversion, each subblock obtained after block are rearranged to obtain different candidate signal, i.e., a first portion of the candidate signal , an OFDM system to improve the accuracy of the peak power optimization;

[0056] (2)本发明根据IFFT的线性性质,利用已生成的候选信号,通过将采用BPSK星座图A所得的候选信号和采用BPSK星座图B所得的候选信号进行相加和幅度加权处理,获得新的候选信号,即第二部分候选信号,从而避免了大量的IFFT计算,大幅度地降低了计算复杂度。 [0056] (2) According to the present invention, the linear nature of the IFFT, using the generated candidate signal, and for adding the amplitude weighting process by using a resultant BPSK constellation A candidate signal and BPSK constellation using the obtained signal B candidate, obtaining new candidate signal, i.e., the second part of the candidate signals, thereby avoiding a large number of IFFT calculation, significantly reducing the computational complexity.

附图说明 BRIEF DESCRIPTION

[0057] 构成本申请的一部分的说明书附图用来提供对本申请的进一步理解,本申请的示意性实施例及其说明用于解释本申请,并不构成对本申请的不当限定。 [0057] constitute a part of this application specification accompanying drawings provide a further understanding of the present disclosure, exemplary embodiments of the present disclosure used to explain the embodiment of the present application, without unduly limiting the present disclosure.

[0058] 图1是本发明实施例公开的基于块交织的OFDM系统峰值功率优化方法流程图; [0058] FIG. 1 is a flowchart showing an OFDM system the peak power optimization method based on block interleaving embodiments disclosed embodiment of the present invention;

[0059] 图2a是本发明实施例公开的BPSK映射星座图A结构图; [0059] FIG 2a is a BPSK constellation mapping A configuration diagram of the embodiment of the disclosed embodiment of the present invention;

[0060] 图2b是本发明实施例公开的BPSK映射星座图B结构图; [0060] FIG 2b is a BPSK constellation mapping of FIG Example B-disclosed embodiment of the present invention;

[0061] 图3是本发明实施例公开的基于块交织的OFDM系统峰值功率优化方法的发射系统结构框图; [0061] FIG. 3 is a block diagram transmit system based on an OFDM system the peak power optimization block interleaving method according to the disclosed embodiment of the present invention;

[0062] 图4是本发明实施例公开的基于块交织的OFDM系统峰值功率优化方法的发射系统所获得的PAPR性能,并与传统块交织方法进行比较。 [0062] FIG. 4 is a PAPR performance OFDM system the peak power transmitting system optimization method based on block interleaving obtained in Example disclosed embodiments of the present invention, and compared with a conventional block interleaving method.

具体实施方式 Detailed ways

[0063] 应该指出,以下详细说明都是示例性的,旨在对本申请提供进一步的说明。 [0063] It should be noted that the following detailed description are exemplary and intended to provide further explanation of the application. 除非另有指明,本文使用的所有技术和科学术语具有与本申请所属技术领域的普通技术人员通常理解的相同含义。 Unless otherwise indicated, all technical and scientific terms used herein have the same meaning of ordinary skill in the relevant technical field application generally understood.

[0064] 需要注意的是,这里所使用的术语仅是为了描述具体实施方式,而非意图限制根据本申请的示例性实施方式。 [0064] It is noted that the terminology used herein is for the purpose of describing particular embodiments only, not intended to limit the exemplary embodiments in accordance with the present disclosure. 如在这里所使用的,除非上下文另外明确指出,否则单数形式也意图包括复数形式,此外,还应当理解的是,当在本说明书中使用术语“包含”和/或“包括”时,其指明存在特征、步骤、操作、器件、组件和/或它们的组合。 As used herein, unless the context clearly dictates otherwise, the singular forms are intended to include plural forms as well, in addition, also to be understood that, when used in the present specification "comprises" and / or "comprising", which indicates presence of stated features, steps, operations, devices, components, and / or combinations thereof.

[0065] 正如背景技术所介绍的,现有技术中存在由于每产生一个候选信号都需要一次快速傅立叶反变换IFFT来实现OFDM调制,计算复杂度非常大的不足,为了解决如上的技术问题,本申请提出了一种基于块交织的OFDM系统峰值功率优化方法及其发射系统。 [0065] As described in the background art, since each of the prior art are required to generate a candidate signal a inverse fast Fourier transform IFFT OFDM modulation is achieved, a very large calculation complexity is insufficient, in order to solve the above technical problem, the present application proposes a system peak power OFDM transmission system based on optimization method and block interleaving.

[0066] 实施例一 [0066] Example a

[0067] 本申请的一种典型的实施方式中,如图1所示,提供了一种基于块交织的OFDM系统峰值功率优化方法,包括以下步骤: [0067] A typical embodiment of the present application, as shown in FIG. 1, a peak power optimization method based on block interleaving in OFDM system, comprising the steps of:

[0068] 步骤101:利用二进制随机序列发生器模块产生二进制序列,并分别利用映射A模块和映射B模块将二进制序列映射为基带频域信号序列Sa和基带频域信号序列Sb; [0068] Step 101: the binary random sequence generator module generates a binary sequence, using the map A respectively B module and a mapping module maps the binary sequence to a baseband frequency-domain signal sequences Sa and baseband frequency-domain signal sequences Sb;

[0069] 步骤102:将基带频域信号序列Sa和基带频域信号序列Sb分别进行分块处理,得到分块处理后的序列Xa和Xb; [0069] Step 102: the base sequence with the frequency-domain signals Sa and the baseband signal frequency-domain sequence into blocks Sb respectively, to obtain the sequence of Xa and Xb into blocks;

[0070] 步骤103:将分块处理后得到的序列Xa和序列Xb进行多次块交织,得到若干个不同的序列Ai和序列Bj; [0070] Step 103: After treating the resulting block sequence Xa and Xb multiple block interleaving sequence to obtain a plurality of different sequences and sequences of Bj Ai;

[0071] 步骤104:对若干个不同的序列Ai和序列Bj分别进行快速傅里叶反变换IFFT,得到多个不同的候选信号ai和候选信号bj,即第一部分候选信号; [0071] Step 104: a sequence of several different sequences Ai and Bj respectively inverse fast Fourier transform IFFT, to obtain a plurality of candidate signals of different candidate signal ai and bj, i.e., a first portion of the candidate signal;

[0072] 步骤105:将第一部分候选信号中的候选信号ai和候选信号bj进行相加和幅度加权处理,得到多个新的候选信号,即第二部分候选信号; [0072] Step 105: the first portion of the candidate signal of the candidate signal and the candidate signals ai and bj amplitude weighting processing for adding, to obtain a new plurality of candidate signal, i.e., the second part of the candidate signal;

[0073] 步骤106:从全部的候选信号中,选择PAPR值最小的候选信号进行传输。 [0073] Step 106: From all candidate signal, the value of the minimum PAPR is selected for transmission candidate signal.

[0074] 本发明实施例提出的基于块交织的OFDM系统峰值功率优化方法,通过映射A模块和映射B模块分别采用两种不同的BPSK映射星座图对二进制序列进行映射处理,可为后续采用相加和幅度加权处理产生新的候选信号奠定基础,将映射后的基带频域信号序列进行分块处理,接着将分块后的各个序列进行多次块交织,并分别进行IFFT变换,从而获得多个不同的候选信号,即第一部分候选信号;然后根据IFFT变换的线性性质,将第一部分候选信号中采用BPSK星座图A所获得的候选信号与采用BPSK星座图B所获得的候选信号进行相加和幅度加权处理,以获得新的候选信号,即第二部分候选信号;最后,从所产生的全部候选信号中,选择PAPR值最小的候选信号进行传输,降低了计算复杂度,峰均功率比性能较好, 且能满足实际应用要求。 [0074] Example embodiments of the present invention proposes to optimize the peak power of OFDM systems based on block interleaving method, by mapping B A module and a mapping module are mapped using two different BPSK constellation mapping processing of the binary sequence, may be employed for the subsequent phase was added and amplitude weighting to generate a new candidate signal basis, the frequency domain signal sequence baseband mapped into blocks, then the respective sequences after the block multiple block interleaving, and respectively IFFT transformation to obtain a plurality different candidate signal, i.e., a first portion of the candidate signal; then, according to the linear nature of the IFFT, the BPSK constellation a candidate signal obtained using the first part of the candidate signal employing BPSK constellation candidate signal obtained by summing B and amplitude weighting to obtain a new candidate signal, i.e., the second part of the candidate signal; Finally, from all the generated candidate signal, the selected value of the minimum PAPR for transmission candidate signal to reduce the computational complexity, PAPR better performance, and can meet the requirements of practical application.

[0075] 为了使本领域的技术人员更好的了解本发明,下面列举一个更为详细的实施例, 本发明实施例提出了一种基于块交织的OFDM系统峰值功率优化方法,包括以下步骤: [0075] In order to enable those skilled in the art a better understanding of the present invention, include the following a more detailed embodiment, an embodiment of an OFDM system the peak power optimization based on block interleaving in the present invention, comprising the steps of:

[0076] 步骤201:利用二进制随机序列发生器模块产生二进制序列,并分别利用映射A模块和映射B模块将二进制序列映射为基带频域信号序列Sa和基带频域信号序列Sb。 [0076] Step 201: the binary random sequence generator module generates a binary sequence, using the map A respectively B module and a mapping module maps the binary sequence to a baseband frequency-domain signal sequences Sa and baseband frequency-domain signal sequences Sb.

[0077] 此处,步骤201可以采用如下方式: [0077] Here, step 201 can be used in the following manner:

[0078] 步骤2011:确定OFDM系统和优化方法的相关参数,相关参数包括子载波数N、BPSK 映射方式、分块数W及相位加权因子集合; [0078] Step 2011: determining optimized parameters OFDM systems and methods, the parameters including the number of subcarriers N, BPSK mapping manner, phase and block number of the weighting factor W set;

[0079] 步骤2012:根据子载波数N和所采用的BPSK映射方式,利用二进制随机序列发生器模块产生二进制序列,将该二进制序列同时送入映射A模块和映射B模块; [0079] Step 2012: according to the number of subcarriers N and the BPSK mapping scheme employed, the binary random sequence generator module generates a binary sequence, the binary sequence while feeding A mapping module and a mapping module B;

[0080] 步骤2013:映射A模块采用BPSK映射星座图A将二进制序列映射为基带频域信号序列SA,其中,BPSK映射星座图A的映射原则是比特0映射为1,比特1映射为-1; [0080] Step 2013: the map A module is BPSK-mapped constellation A binary sequence is mapped to a frequency domain signal sequence SA baseband, wherein the mapping principles BPSK-mapped constellation A is a bit 0 is mapped to 1, bit 1 is mapped to -1 ;

[0081] 步骤2014:映射B模块采用BPSK映射星座图B将二进制序列映射为基带频域信号序列Sb;BPSK映射星座图B的映射原则是比特0映射成i,比特1映射为-i ; [0081] Step 2014: the mapping module B B using BPSK constellation mapping binary sequence is mapped to a baseband frequency-domain signal sequences Sb; mapping principles BPSK constellation mapping B is mapped into bit 0 i, is mapped to bit 1 -i;

[0082] 步骤2015:映射A模块和映射B模块分别采用两种不同的BPSK映射星座图将二进制序列映射为基带频域信号序列后,将映射后的基带频域信号序列送入分块模块。 [0082] Step 2015: the map A module and a mapping B modules respectively two different BPSK-mapped constellation binary sequence is mapped to a baseband back-domain signal sequence in frequency, the frequency domain signal sequence baseband mapped into the block module.

[0083] 这里,BPSK映射星座图A和BPSK映射星座图B如图2a和图2b所示,通过映射A模块和映射B模块分别采用这两种不同的BPSK映射星座图将二进制序列映射为基带频域信号序列,可为后续利用相加和幅度加权处理产生新的候选信号奠定基础。 [0083] Here, BPSK constellation map A and B BPSK constellation mapping of FIG. 2a and 2b, by mapping the A module and a mapping module B respectively of the two different binary BPSK constellation mapping sequence is mapped to a baseband frequency-domain signal sequences, the addition and subsequent utilization may be amplitude weighted signals to produce a new candidate basis.

[0084] 步骤202:将基带频域信号序列Sa和基带频域信号序列Sb分别进行分块处理,得到分块处理后的序列Xa和Xb。 [0084] Step 202: the base sequence with the frequency-domain signals Sa and the baseband signal frequency-domain sequence into blocks Sb respectively, to obtain the sequence of Xa and Xb into blocks.

[0085] 采用相邻分割的方式将基带频域信号序列Sa和基带频域信号序列Sb分别进行分块处理,得到分块处理后的序列Xa和序列Xb,并将序列Xa和序列Xb发送至块交织模块,进行后续的多次块交织。 [0085] by way of the adjacent divided frequency-domain signal sequence of frequency-domain signal sequences baseband Sa and baseband Sb respectively into blocks, the sequence Xa and the sequence Xb obtained block after treatment, and the sequence Xa and the sequence Xb sent to block interleaving module, a plurality of times subsequent block interleaving.

[0086] 其中,分块处理后的序列Xa和序列Xb可表示为Xa= [ΧΑα,Χ/^, — ,ΧΑ,ΐΟΊ^ΡΧΒ = [Χβ,1,Χβ,2,…,Xb,w] τ〇 [0086] wherein the sequence Xa and the sequence Xb after the block processing can be expressed as Xa = [ΧΑα, Χ / ^, -, ΧΑ, ΐΟΊ ^ ΡΧΒ = [Χβ, 1, Χβ, 2, ..., Xb, w] τ〇

[0087] 步骤203:将分块处理后得到的序列Xa和序列Xb进行多次块交织,得到若干个不同的序列Ai和序列Bj。 [0087] Step 203: After treating the resulting block sequence Xa and Xb multiple block interleaving sequence to obtain a plurality of sequences of different sequences Ai and Bj.

[0088] 通过块交织模块对分块处理后得到的序列Xa和序列Xb进行多次块交织,即对分块处理后得到的序列Xa和序列Xb中的各个子块进行重新排序,得到新排序的若干个不同的序列Ai和序列Bj。 [0088] sequence by a block interleaver module Xa and Xb sequence into blocks obtained after multiple block interleaving, i.e., for each sub-block sequence Xa and Xb sequence obtained after processing in block reordering, to give a new sort several different sequences sequences Ai and Bj.

[0089] 步骤204:对若干个不同的序列Ai和序列Bj分别进行快速傅里叶反变换IFFT,得到多个不同的候选信号ai和候选信号bj,即第一部分候选信号; [0089] Step 204: a sequence of several different sequences Ai and Bj respectively inverse fast Fourier transform IFFT, to obtain a plurality of candidate signals of different candidate signal ai and bj, i.e., a first portion of the candidate signal;

[0090] 对分块处理后的序列Xa和序列Xb分别进行多次块交织,并分别进行快速傅里叶反变换IFFT,完成OFDM调制,以获得多个不同的候选信号,即第一部分候选信号,这里假设ai, i = 1,2,…,G和bj,j = 1,2,…,H分别表示对序列Xa和序列Xb进行多次块交织并完成OFDM调制后所获得的候选信号,G和H分别表示采用星座图A和星座图B所获得的候选信号ai和候选信号h的数量。 [0090] sequence sequence Xb Xa and after treatment were multiple block interleaving block, respectively, and the IFFT inverse fast Fourier transform, the OFDM modulation is completed, to obtain a plurality of different candidate signals, i.e., a first candidate signal portion here is assumed that ai, i = 1,2, ..., G and bj, j = 1,2, ..., H, respectively, a sequence of Xa and Xb sequence and complete multiple candidate block interleaving OFDM modulation signal obtained, G and H represent the number of candidate constellation using the constellation Panels a and B of the obtained signals ai and candidate signal h.

[0091] 步骤205:将第一部分候选信号中的候选信号ai和候选信号bj进行相加和幅度加权处理,得到多个新的候选信号,即第二部分候选信号。 [0091] Step 205: the first portion of the candidate signal of the candidate signal and the candidate signals ai and bj amplitude weighting processing for adding, to obtain a new plurality of candidate signal, i.e., the second part of the candidate signals.

[0092] 根据快速傅里叶反变换IFFT的线性性质,将第一部分候选信号中采用BPSK星座图A所获得的候选信号ai与采用BPSK星座图B所获得的候选信号匕进行相加和幅度加权处理, 以获得新的候选信号,即第二部分候选信号,可表示为 [0092] The linear behavior of the Inverse Fast Fourier Transform IFFT, a first portion of the candidate signal using BPSK constellation AI candidate signal A obtained employing BPSK constellation dagger candidate signal B obtained by summing and weighting the amplitude treatment, to obtain a new candidate signal, i.e., the second part of the candidate signals may be expressed as

Figure CN108055225AD00091

[0094] 其中,Ai,i = 1,2,…,G和Bj,j = 1,2,…,H分别表示对分块后的序列Xa和序列Xb进行块交织后的序列;ai和匕为对分块处理后的序列Xa和Xb进行多次块交织并分别进行IFFT 后得到的候选信号,即第一候选信号;G和H分别表示采用星座图A和星座图B所获得的候选信号ai和候选信号匕的数量。 [0094] wherein, Ai, i = 1,2, ..., G and Bj, j = 1,2, ..., H, respectively, a sequence of Xa and Xb sequence after block after block interleaving sequence; AI and dagger candidate signal sequences interleaved Xa and Xb for the post processing block and multiple blocks IFFT were obtained, i.e., a first candidate signal; G and H respectively represent the signal constellation employed candidate constellation a and B obtained ai and the number of candidate signal dagger.

[0095]由于米用星座图A映射后得到的序列Ai和米用星座图B映射后得到的序列Bj的兀素集合分别为U,_1}和U,_i},则序列A1和序列叫相加之后的元素集合可表示为{1+i,ι-i,-1 +i,-li}。 [0095] Since the sequence Ai after rice using constellation A mapping obtained and Wu prime sequence of sets of Bj after rice using constellation B obtained by mapping respectively U, _1} and U, _i}, the A1 and sequence called phase after the element is added it can be expressed as a set of {1 + i, ι-i, -1 + i, -li}. 因此,与构成序列A1和序列的元素相比较,序列A1和序列相加之后的序列相当于在序列Ai和序列Bj的基础上乘以相位加权因子exp (jJi/4)或exp (-jJi/4)。 Thus, compared to a sequence A1 and a sequence of elements constituting the sequence A1 and sequence after the addition in the base sequence corresponding to the sequence Ai and Bj phase weighting factor is multiplied by exp (jJi / 4) or exp (-jJi / 4 ). 此外,由于序列仏和序列叫相加之后的序列中各元素幅度不再为1,为了保证相加后序列和映射后序列中元素的幅度一致性,则需要用 Further, since the sequence after the sequence and the sequence called Fo addition of the elements is no longer an amplitude 1, in order to ensure the consistency of the amplitude after the addition sequence and map elements in the sequence, the need to use

Figure CN108055225AD00101

对相加后的序列进行幅度加权处理。 After the addition sequence amplitude weighting. 根据第一部分所产生的候选信号数量,可得第二部分所能产生的最大候选信号数量为GXH,则全部的候选信号可表不为 The number of candidate signal generated by the first portion, the maximum number of candidate signals may be available for the second portion can generate GXH, then all of the candidate signal list may not

[0096] [0096]

Figure CN108055225AD00102

[0097] 步骤206:从全部的候选信号中,选择PAPR值最小的候选信号进行传输。 [0097] Step 206: From all candidate signal, the value of the minimum PAPR is selected for transmission candidate signal.

[0098] 即从第一部分候选信号和第二部分候选信号中,选择PAPR值最小的候选信号进行传输。 [0098] i.e., from the first portion and the second portion of the candidate signal candidate signal, the value of the minimum PAPR is selected for transmission candidate signal.

[0099] 本发明实施例提出的基于块交织的OFDM系统峰值功率优化方法,通过映射A模块和映射B模块分别采用两种不同的BPSK映射星座图对二进制序列进行映射处理,可为后续采用相加和幅度加权处理产生新的候选信号奠定基础,将映射后的基带频域信号序列进行分块处理,接着将分块后的各个序列进行多次块交织,并分别进行IFFT变换,从而获得多个不同的候选信号,即第一部分候选信号;然后根据IFFT变换的线性性质,将第一部分候选信号中采用BPSK星座图A所获得的候选信号与采用BPSK星座图B所获得的候选信号进行相加和幅度加权处理,以获得多个新的候选信号,即第二部分候选信号;最后,从所产生的全部候选信号中,选择PAPR值最小的候选信号进行传输,降低了计算复杂度,峰均功率比性能较好,且能满足实际应用要求。 [0099] Example embodiments of the present invention proposes to optimize the peak power of OFDM systems based on block interleaving method, by mapping B A module and a mapping module are mapped using two different BPSK constellation mapping processing of the binary sequence, may be employed for the subsequent phase was added and amplitude weighting to generate a new candidate signal basis, the frequency domain signal sequence baseband mapped into blocks, then the respective sequences after the block multiple block interleaving, and respectively IFFT transformation to obtain a plurality different candidate signal, i.e., a first portion of the candidate signal; then, according to the linear nature of the IFFT, the BPSK constellation a candidate signal obtained using the first part of the candidate signal employing BPSK constellation candidate signal obtained by summing B and amplitude weighting to obtain a plurality of candidates for a new signal, i.e., the second part of the candidate signal; Finally, from all the generated candidate signal, the selected value of the minimum PAPR for transmission candidate signal to reduce the computational complexity, the peak to average power is better than the performance, and can meet the requirements of practical application.

[0100] 实施例二 [0100] Second Embodiment

[0101] 本申请的另一种典型实施方式,如图3所示,提供了一种基于块交织的OFDM系统峰值功率优化方法的发射系统,该系统包括二进制随机序列发生器模块、映射A模块、映射B模块、分块模块、块交织模块、IFFT模块、候选信号处理模块和最优候选信号选择模块,所述二进制随机序列发生器模块分别与映射A模块、映射B模块相连接,所述映射A模块和映射B模块分别与对应的分块模块的输入端相连接,所述分块模块的输出端与多个块交织模块连接,每个块交织模块分别与对应的IFFT模块相连接,全部的IFFT模块输出端分别与候选信号处理模块和最优候选信号选择模块相连接,所述候选信号处理模块的输出端也与最优候选信号选择模块相连接。 [0101] Another application of the present exemplary embodiment, shown in Figure 3, a peak power transmitting system optimization method based on a block interleaving in OFDM system, the system comprising a binary random sequence generator module, a mapping module A , B mapping module, a module block, block interleaving module, the IFFT module, and a signal processing module candidate signal best candidate selection module, said random binary sequence generator module respectively mapping module A, module B is connected to the mapping, the a mapping module and a mapping module is connected to the B input terminal of the corresponding block module, the output of sub-blocks and the plurality of block interleaving module connected modules, each module block interleaving are respectively connected to the corresponding IFFT module, IFFT block all output terminals are connected to the signal processing module and the candidate signal best candidate selection module, the output of said candidate signal processing module is also connected to the best candidate signal selection module.

[0102] 其中,二进制随机序列发生器模块,用于产生二进制序列,并将其同时送入映射A 模块和映射B模块; [0102] wherein, the binary random sequence generator means for generating a binary sequence, and while the map A into B module and a mapping module;

[0103] 映射A模块,用于将二进制序列映射为基带频域信号序列SA,并将映射后的基带频域信号序列Sa送入分块模块; [0103] A mapping module, for mapping the binary sequence to a baseband signal frequency domain sequence SA, and the mapped frequency-domain baseband signal Sa into the sequence block module;

[0104] 映射B模块,用于将二进制序列映射为基带频域信号序列SB,并将映射后的基带频域信号序列Sb送入分块模块; [0104] B mapping module, for mapping the binary sequence to a baseband frequency-domain signal sequence SB, and the frequency-domain signal Sb mapped sequence into a baseband block module;

[0105] 分块模块,用于将映射后的基带频域信号序列Sa和Sb分为若干个子块序列,并发送至块交织模块; [0105] partitioning module, for mapping the frequency-domain baseband signal sequences Sa and Sb is divided into several sub-block sequence, and transmitted to the block interleaving module;

[0106] 块交织模块,用于将分块后获得的各个子块序列进行重新排列,并将重新排列后的序列送入IFFT模块; [0106] Block interleaving module, for each subblock obtained block sequence rearranged and rearranged into the sequence of IFFT modules;

[0107] IFFT模块,用于对重新排列后的子块序列进行快速傅里叶反变换IFFT,得到多个不同的候选信号ai和候选信号bj,即第一部分候选信号,并将多个不同的候选信号ai和候选信号h传输至候选信号处理模块和最优候选信号选择模块; [0107] IFFT module for sub-block sequence rearranged the IFFT inverse fast Fourier transform, to obtain a plurality of different candidate signals ai and BJ candidate signal, i.e., a first part of the candidate signals, and a plurality of different ai and candidate signal candidate signal h is transmitted to the candidate signal best candidate signal processing module and a selection module;

[0108] 候选信号处理模块,用于将第一部分候选信号中的候选信号ai与候选信号h进行相加和幅度加权处理,产生新的候选信号,即第二部分候选信号; [0108] candidate signal processing module, a first portion of the candidate for the candidate signal signal signal h ai candidate for amplitude weighting and adding process, a new candidate signal, i.e., the second part of the candidate signal;

[0109] 最优候选信号选择模块,用于接收IFFT模块发送的第一部分候选信号和候选信号处理模块发送的第二部分候选信号,从全部候选信号中选出PAPR值最小的候选信号。 [0109] The optimum candidate signal selection module, a second portion of the first portion of the candidate signal candidate and candidate signal processing means for receiving the signal transmitted from the transmitter IFFT module, and the minimum value of the selected candidate signal PAPR from all the candidate signal.

[0110] 在本实施例中,所述映射A模块和映射B模块分别采用两种不同的BPSK映射星座图将二进制序列映射为基带频域信号序列,并将映射后的基带频域信号序列送入分块模块; 这里两种不同的BPSK映射星座图分别用BPSK映射星座图A和BPSK映射星座图B来表示,即映射A模块采用BPSK映射星座图A,映射B模块采用BPSK映射星座图B,两种不同的BPSK星座图如图2a和图2b所示,可为后续利用相加和幅度加权处理产生新的候选信号奠定基础。 [0110] In the present embodiment, the mapping module A and B modules are mapped using two different binary BPSK constellation mapping sequence is mapped to a baseband frequency-domain signal sequences, and maps the frequency-domain base-band transmission signal sequence the partitioning module; where two different BPSK constellation mapping are represented, i.e. a mapping module mapping using BPSK BPSK constellation mapping constellation a with a and B BPSK constellation mapping, the mapping module B using BPSK constellation mapping B two different BPSK constellation shown in Figures 2a and 2b, the basis for subsequent use amplitude weighting and adding new candidate signal generation.

[0111] 本实施例提出的基于块交织的OFDM系统峰值功率优化方法的发射系统的工作原理为: [0111] The working principle of the transmission system based on the proposed method for optimizing the peak power of the OFDM system block interleaving to the present embodiment:

[0112] 将待传输的二进制序列分别采用图2a和图2b中所示的BPSK映射的星座图A和星座图B进行映射,分别经过分块处理后送入多个不同的块交织模块对各个子块进行重新排列, 并将块交织处理后的各个序列分别进行IFFT变换完成OFDM调制,获得第一部分候选信号; 接着,将第一部分候选信号中采用星座图A所获得的候选信号与采用星座图B所获得的候选信号进行相加和幅度加权处理,以获得多个新的候选信号,即第二部分候选信号;最后,从全部的候选信号中选择PAPR值最小的候选信号进行传输。 [0112] binary sequence to be transmitted constellation respectively A and B BPSK constellation diagram shown in Figures 2a and 2b are mapped map, respectively, after the processing block into a plurality of different modules for each block interleaver subblock rearrangement, and each block interleaving sequence after the IFFT processing are performed to complete the OFDM modulated signal to obtain a first portion of the candidate; Next, candidate a signal constellation will be obtained using the first part of the candidate signal constellation employing B candidate signal obtained by summing and weighting the amplitude to obtain a plurality of candidates for a new signal, i.e., the second part of the candidate signal; finally, select the smallest PAPR value candidate signal transmission from all of the candidate signals.

[0113] 关于在接收端如何正确解调传输序列的问题,可以直接采用现存的块交织接收机,这里不再赘述。 [0113] On the receiving end how to properly demodulate the transmission sequence, can be employed directly in existing receiver block interleaving, it is not repeated here.

[0114] 下面列举一个具体的计算实例来验证本发明所述获得的效果。 [0114] Next, to verify the effect of the present invention obtained by a specific calculation examples recited.

[0115] 如图4所示,给出了采用本发明实施例提出的基于块交织的OFDM系统峰值功率优化方法的发射系统在不同参数下所获得的PAPR性能。 [0115] 4, the embodiment of the present invention is given using the PAPR performance of OFDM system the peak power transmission system based optimization block interleaving embodiments presented different parameters obtained.

[0116] 仿真条件:采用MATLAB仿真平台,随机产生IO5个OFDM信号,BPSK调制,子载波数为128,采用4倍过采样。 [0116] Simulation conditions: using MATLAB simulation platform, IO5 a randomly generated OFDM signal, the BPSK modulation, subcarrier number 128, using 4-times oversampling.

[0117] 为了便于比较,在仿真过程中,基于块交织的OFDM系统峰值功率优化方法和传统块交织产生相同数量的候选信号。 [0117] For comparison, during the simulation, optimization method based on the peak power of the OFDM system, a block interleaving and block interleaving traditional produce the same number of candidate signals. 关于计算复杂度,表1给出了在候选信号数量相同的情况下,与传统块交织相比,本发明实施例提出的基于块交织的OFDM系统峰值功率优化方法所获得的计算复杂度降低程度。 On computational complexity, Table 1 shows the number of candidate signal in the same case, as compared with a conventional block interleaver, the degree of computational complexity is reduced peak power optimization method based on block interleaving OFDM system proposed according to the embodiment of the present invention obtained in .

[0118] 表1与传统块交织相比,基于块交织的OFDM系统峰值功率优化方法所获得的计算复杂度降低程度 [0118] Table 1 in comparison with a conventional block interleaver, the computational complexity of the optimization OFDM system the peak power block interleaving method based on the obtained degree of reduction

[0119] [0119]

Figure CN108055225AD00111

[0120] 从图4和表1可以看出,与传统块交织相比,本发明实施例提出的基于块交织的OFDM系统峰值功率优化方法在大幅度降低计算复杂度的基础上,可以获得相似的PAPR性能,完全可以满足OFDM系统对PAPR性能的要求。 [0120] As can be seen from Figure 4 and Table 1, as compared with a conventional block interleaver, embodiments of the present invention is to optimize the peak power of OFDM systems based on block interleaving method on the basis of a significant reduction in computational complexity, the proposed embodiments can be obtained similar the PAPR performance, fully meet the requirements of the PAPR OFDM system performance.

[0121] 上述虽然结合附图对本发明的具体实施方式进行了描述,但并非对本发明保护范围的限制,所属领域技术人员应该明白,在本发明的技术方案的基础上,本领域技术人员不需要付出创造性劳动即可做出的各种修改或变形仍在本发明的保护范围以内。 [0121] The combination with drawings of specific embodiments of the present invention have been described, but not limit the scope of the present invention, those skilled in the art should understand that, on the basis of the technical solution of the present invention, those skilled in the art without paying creative work to make various modifications or variations are still within the scope of the present invention.

Claims (10)

1. 一种基于块交织的OFDM系统峰值功率优化方法,其特征是,包括以下步骤: 利用二进制随机序列发生器模块产生二进制序列,并分别利用映射A模块和映射B模块将二进制序列映射为基带频域信号序列Sa和基带频域信号序列Sb; 将基带频域信号序列Sa和基带频域信号序列Sb分别进行分块处理,得到分块处理后的序列Xa和序列Xb; 将分块处理后得到的序列Xa和序列Xb进行多次块交织,得到若干个不同的序列A1和序列Bj; 对若干个不同的序列A1和序列分别进行快速傅里叶反变换IFFT,得到多个不同的候选信号ai和候选信号bj,即第一部分候选信号; 将第一部分候选信号中的候选信号ai和候选信号bj进行相加和幅度加权处理,得到多个新的候选信号,即第二部分候选信号; 从全部的候选信号中,选择PAPR值最小的候选信号进行传输。 An OFDM system the peak power optimization based on block interleaving method, wherein, comprising the steps of: using a random binary sequence generator module generates a binary sequence, using the map A respectively B module and a mapping module maps the binary sequence into a baseband after the block process; the frequency domain signal sequence of frequency-domain signal sequences baseband Sa and baseband Sb respectively into blocks, to obtain sequence Xa and the sequence Xb after blocking treatment; frequency-domain signal sequences Sa and baseband frequency-domain signal sequences Sb sequences obtained Xa and Xb multiple block interleaving sequence to obtain a plurality of different sequence A1 and a sequence of Bj; sequences of a number of different sequences A1 and inverse fast Fourier transform IFFT, respectively, to obtain a plurality of candidate signals of different ai and bj candidate signal, i.e., a first portion of the candidate signal; candidate signals ai and bj candidate signal in a first part of the candidate signal and amplitude weighting are summed to give a new plurality of candidate signals, i.e., the second part of the candidate signal; from all candidate signal, the value of the minimum PAPR is selected for transmission candidate signal.
2. 根据权利要求1所述的基于块交织的OFDM系统峰值功率优化方法,其特征是,所述利用二进制随机序列发生器模块产生二进制序列,包括: 确定OFDM系统和优化方法的相关参数,相关参数包括子载波数N、BPSK映射方式、分块数W及相位加权因子集合; 根据子载波数N和所采用的BPSK映射方式,利用二进制随机序列发生器模块产生二进制序列,将该二进制序列同时送入映射A模块和映射B模块。 According to claim peak power optimization method for OFDM systems based on block interleaving, which is characterized in claim 1, the use of random binary sequence generator module generates a binary sequence, comprising: determining relevant parameters optimization method and OFDM systems, the relevant parameter comprises a number of subcarriers N, BPSK mapping manner, the number of sub-blocks and W phase set of weighting factors; according to the number of subcarriers N and the BPSK mapping manner employed, the binary random sequence generator module generates a binary sequence, the binary sequence at the same time A mapping and a mapping module into module B.
3. 根据权利要求1所述的基于块交织的OFDM系统峰值功率优化方法,其特征是,所述分别利用映射A模块和映射B模块将二进制序列映射为基带频域信号序列Sa和基带频域信号序列Sb,包括: 映射A模块采用BPSK映射星座图A将二进制序列映射为基带频域信号序列Sa; 映射B模块采用BPSK映射星座图B将二进制序列映射为基带频域信号序列Sb; 其中,BPSK映射星座图A的映射原则是比特0映射为1,比特1映射为-I; BPSK映射星座图B的映射原则是比特0映射成i,比特1映射为_i。 According to claim OFDM system the peak power optimization method based on block interleaving, which is characterized in claim 1, the use of the map A respectively B module and a mapping module maps the binary sequence is a sequence of frequency-domain signals Sa and baseband frequency domain baseband signal sequences Sb, comprising: mapping A module is BPSK-mapped constellation A binary sequence is mapped to a baseband frequency-domain signal sequences Sa; mapping B module uses BPSK-mapped constellation B binary sequence is mapped to a baseband frequency-domain signal sequences Sb; wherein, mapping principles BPSK constellation mapping a 0 bit is mapped to 1, bit 1 is mapped -I; mapping principles BPSK constellation mapping B is mapped into bit 0 i, is mapped to bit 1 _i.
4. 根据权利要求1所述的基于块交织的OFDM系统峰值功率优化方法,其特征是,所述将基带频域信号序列Sa和基带频域信号序列Sb分别进行分块处理,得到分块处理后的序列Xa 和序列Xb,包括: 采用相邻分割的方式将基带频域信号序列Sa和基带频域信号序列Sb分别进行分块处理,得到分块处理后的序列Xa和序列Xb。 According to claim OFDM system the peak power optimization method based on block interleaving, which is characterized in claim 1, the frequency-domain signal sequence of frequency-domain baseband signal sequences Sa and Sb respectively baseband processing block, block processed to give after the sequence Xa and Xb sequence, comprising: segmentation by way of the adjacent baseband sequence Xa and Xb sequence after frequency domain baseband signal sequences Sa and Sb are frequency-domain signal sequence into blocks, to obtain processed sub-blocks.
5. 根据权利要求1所述的基于块交织的OFDM系统峰值功率优化方法,其特征是,所述将分块处理后得到的序列Xa和序列Xb进行多次块交织,得到若干个不同的序列A1和序列叫,包括: 将分块处理后得到的序列Xa和序列Xb中的各个子块进行重新排序,得到新排序的若干个不同的序列Ai和序列Bj。 The peak power of the optimization method based on a block interleaving OFDM system as claimed in claim, characterized in that, after the obtained sequences into blocks Xa and Xb multiple block interleaving sequence to obtain a plurality of different sequences A1 and call sequences, comprising: a sub-block sequence each Xa and Xb sequence obtained after processing in block reordering, to give a number of different sequences Ai and Bj-ordered sequence.
6. 根据权利要求1所述的基于块交织的OFDM系统峰值功率优化方法,其特征是,所述将第一部分候选信号中的候选信号和候选信号匕进行相加和幅度加权处理,得到多个新的候选信号,即第二部分候选信号,包括: 将第一部分候选信号中的候选信号m和候选信号h进行相加; 对相加后的信号进行幅度加权处理,得到多个新的候选信号,即第二部分候选信号。 The peak power of the optimization method based on a block interleaving OFDM system as claimed in claim, wherein said candidate signal of the candidate signal and a first portion of the candidate dagger signal and amplitude weighting are summed to give a plurality of the new candidate signal, i.e., the second part of the candidate signal, comprising: a first signal part of the candidate and the candidate signal m for adding the candidate signal h; after the addition of the signal amplitude weighting to obtain a new plurality of candidate signal that the second part of the candidate signals.
7. 根据权利要求1所述的基于块交织的OFDM系统峰值功率优化方法,其特征是,所述第二部分候选信号的表达式为: The peak power of the optimization method based on a block interleaving OFDM system as claimed in claim, characterized in that the second portion of the expression for the candidate signals:
Figure CN108055225AC00031
其中,Ai,i = 1,2,…,G和Bj,j = 1,2,…,H分别表示对分块后的序列Xa和序列Xb进行块交织后的序列;adPh为对分块处理后的序列Xa和Xb进行多次块交织并分别进行IFFT后得到的候选信号;G和H分别表不候选信号ai和候选信号bj的数量。 Wherein, Ai, i = 1,2, ..., G and Bj, j = 1,2, ..., H, respectively, a sequence of Xa and Xb sequence after block after block interleaving sequence; ADPH to processing block after multiple sequences of Xa and Xb respectively block interleaving and the candidate signal after IFFT obtained; G and H respectively denote the number of candidate signals are not ai and bj of the candidate signals.
8. —种基于块交织的OFDM系统峰值功率优化方法的发射系统,其特征是,包括: 二进制随机序列发生器模块,用于产生二进制序列,并将其同时送入映射A模块和映射B丰旲块; 映射A模块,用于将二进制序列映射为基带频域信号序列SA,并将映射后的基带频域信号序列Sa送入分块模块; 映射B模块,用于将二进制序列映射为基带频域信号序列SB,并将映射后的基带频域信号序列Sb送入分块模块; 分块模块,与多个块交织模块相连接,用于将映射后的基带频域信号序列Sa和基带频域信号序列Sb分为若干个子块序列,并发送至块交织模块; 块交织模块,用于将分块后得到的各个子块序列进行重新排列,并将重新排列后的序列送入IFFT模块; IFFT模块,用于对重新排列后的子块序列进行快速傅里叶反变换IFFT,得到多个不同的候选信号ai和候选信号bj,即第一部分 8. - Species OFDM system the peak power transmitting system optimization method based on block interleaving, characterized in that, comprising: a binary random sequence generator means for generating a binary sequence, and while the map A into the map B module and Fung Dae block; a mapping module, for mapping the binary sequence into a frequency domain sequence SA baseband signal, the baseband and the mapped frequency-domain signal block into the sequence module Sa; B mapping means for mapping the binary sequence into a baseband SB frequency-domain signal sequences, and the frequency-domain baseband signal Sb sequence mapped into block module; partitioning module, a plurality of blocks and interleaving module is connected, for mapping the frequency domain signal sequence and a baseband baseband Sa frequency-domain signal sequence is divided into a plurality of sub-blocks Sb sequence, and transmitted to the block interleaving module; block interleaving module, for each subblock obtained block sequence rearranged sequence and rearranged into the IFFT module ; the IFFT module, for sub-block sequence rearranged the IFFT inverse fast Fourier transform, to obtain a plurality of different candidate signals ai and BJ candidate signal, i.e., the first portion 选信号,并将第一部分候选信号传输至候选信号处理模块和最优候选信号选择模块; 候选信号处理模块,用于将第一部分候选信号中的候选信号ai与候选信号h进行相加和幅度加权处理,产生多个新的候选信号,即第二部分候选信号; 最优候选信号选择模块,用于从所产生的全部候选信号中选出PAPR值最小的候选信号。 Select signal, and a first portion of the candidate signal to the candidate signal best candidate signal processing module and a selection module; candidate signal processing module, a first portion of the candidate signal candidate signal ai candidate will be signal h for amplitude weighting and adding processed to produce a new plurality of candidate signal, i.e., the second part of the candidate signal; best candidate signal selecting means for selecting a minimum PAPR value candidate signals from all the generated candidate signal.
9. 根据权利要求8所述的基于块交织的OFDM系统峰值功率优化方法的发射系统,其特征是,所述映射A模块采用BPSK映射星座图A将二进制序列映射为基带频域信号序列Sa;所述映射B模块采用BPSK映射星座图B将二进制序列映射为基带频域信号序列SB。 9. The system of claim 8 based on the transmission peak power optimization block interleaving in OFDM systems, characterized in that said mapping module A uses BPSK constellation mapping A binary sequence is mapped to a baseband frequency-domain signal sequences Sa; the mapping module B B using BPSK constellation mapping binary sequence is mapped to a baseband frequency-domain signal sequence SB.
10. 根据权利要求8所述的基于块交织的OFDM系统峰值功率优化方法的发射系统,其特征是,所述IFFT模块的输出端分别与候选信号处理模块、最优候选信号选择模块相连接。 10. The transmission system according to claim OFDM system the peak power optimization method based on block interleaving, which is characterized in claim 8, the output of the IFFT module candidate signal processing module, respectively, the optimal selection module connected to the candidate signal.
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