CN101150357B - Method for eliminating peak power - Google Patents

Method for eliminating peak power Download PDF

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CN101150357B
CN101150357B CN2006101132501A CN200610113250A CN101150357B CN 101150357 B CN101150357 B CN 101150357B CN 2006101132501 A CN2006101132501 A CN 2006101132501A CN 200610113250 A CN200610113250 A CN 200610113250A CN 101150357 B CN101150357 B CN 101150357B
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clipping
power
sequence
data
peak
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CN101150357A (en
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熊军
段滔
刘先锋
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大唐移动通信设备有限公司
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THIR OWN ENERGY USE
    • Y02D70/00Techniques for reducing energy consumption in wireless communication networks
    • Y02D70/40According to the transmission technology
    • Y02D70/44Radio transmission systems, i.e. using radiation field

Abstract

一种削除峰值功率的方法,包括:(1)经调制扩频后的每一路信号进行内插滤波,变频成不同频点信号;(2)所有频点信号在时域上进行线性叠加;(3)依据幅度变化调节的削峰序列对叠加后需要削峰的信号进行对削。 A method deleted peak power, comprising: (1) by the modulated signal in each channel for spreading interpolation filtering, frequency signals into different frequency; (2) all linear frequency signal is superimposed in the time domain; ( 3) superimposed on the signal after the clipping is required to adjust the cut according to changes in amplitude clipping sequence. 在削除峰值时,可以分别自适应调节I路削峰序列和Q路削峰序列的幅度,以达到自适应削除峰值功率,同时还使得原始信号的相位信息损失最小的目的。 When peak deleted, may each adaptive amplitude I and Q sequences clipping path clipping sequence deleted in order to achieve an adaptive peak power, but also to minimize the loss of phase information of the original object signal.

Description

削除峰值功率的方法 Method deleted peak power

技术领域 FIELD

[0001] 本发明涉及通信领域,尤其涉及一种TDD (时分双工)多频点通信系统中削除峰值功率的方法及实现削除峰值功率的通信端。 [0001] The present invention relates to the field of communications, particularly to a TDD (Time Division Duplex) communication system, a method points deleted and a peak power of multi-frequency communication terminal deleted achieve peak power.

背景技术 Background technique

[0002] 在TDD通信系统(如TD-SCDMA时分同步码分多址通信系统及OFDM TDD正交频分复用时分双工通信系统)的小区中,由于需要发射的多频点信号在数字中频将进行合并,以便在后续的射频通道中共用一套发射机进行发射,因此在天线发射端就会出现由于峰峰迭加产生较强的信号峰均比PAPR(peak to average power raio,峰值功率与均值功率之比值)。 [0002] In a TDD communication system (e.g., TD-SCDMA time division synchronous code division multiple access communication systems and the OFDM orthogonal frequency-division multiplexing TDD time division duplex communication system) in the cell, since a multi-frequency signals transmitted in the digital IF will be combined so that the CCP with a transmitter to transmit a subsequent radio frequency channel, since there will therefore generate a strong peak signal superimposed PAPR PAPR (peak to average power raio, the peak power at the antenna transmitting end the average power ratio) and. 峰值功率太大,很容易使射频发射到非线性区,从而产生较强的ACLR (AdjacentChannel Leakage power Ratio, ACLR,发射机的邻信道泄露功率比),进而降低系统性能。 Peak power is too large, it is easy to make the radio frequency transmitter nonlinear region, thereby producing stronger the ACLR (Adjacent Channel AdjacentChannel Leakage power Ratio, ACLR, the transmitter leakage power ratio), thereby reducing the system performance. 如果不想造成非线性失真,发射信号的功率必须小于IdB压缩点,这就要求信号的平均功率降得很低,但是这种情况下,功放的效率就会降低,同时射频发送的信号功率不能达到物理层要求的dB数,从而使得基站的覆盖范围缩小,用户的信号功率受损。 If you do not want to cause nonlinear distortion, the power of the transmitted signal must be less than IdB compression point, which requires the average power of the signal drop very low, but in this case, the efficiency of the amplifier will be reduced, while the signal transmitted RF power can not be achieved physical layer requirements of several dB, so that the reduced coverage of the base station, signal power impaired user. 并且,高的峰均比会导致D/A转换器的动态范围变小,如果使用高阶数的D/A转换器,成本将会大大提高,如果使用阶数低的D/A变换器,量化噪声会加大。 And, a high PAPR leads to dynamic range of the D / A converter becomes small, if the number of high-order D / A converter, the cost will be greatly improved, if a low order of D / A converter, quantization noise will increase.

[0003] 现有技术中提出三种降低峰均比的方法:削波法、序列选择法和相位幅度变换法。 [0003] proposed in the prior art method of reducing the PAPR of three kinds: clipping method, the sequence selection methods amplitude and phase transformation. 在TDD多频点系统中,序列选择法实现起来复杂,通常不予采用。 In the multi-frequency TDD system, to implement complex sequence selection method, typically not employed. 削波法是对功率过高的峰值进行削除,容易产生非线性失真。 Clipping method is a high peak power be deleted, prone to nonlinear distortion. 其中有一种时域削峰频域滤波法,此种方法首先使用硬判法,将超过门限功率的数据进行硬切,然后使用滤波器削除硬切造成的非线性失真。 Wherein there is a frequency domain time domain clipping filter method, this method first hard decision method, the data exceeds the threshold power of hard cut, then using a filter deleted nonlinear distortion caused by a hard cut. 但是,这种方法非线性失真并不能完全削除,仍然会导致很大的频谱泄漏。 However, this approach does not fully nonlinear distortion deleted, still cause a lot of spectral leakage.

[0004] 相位幅度变换法虽然不产生非线性失真,但是如果要使得每一次旋转后峰均比最优,必须进行大量的计算并且需要传递边带信息,延时较大且处理复杂,传送边带信息还容易产生误码扩散。 Although the [0004] phase-amplitude transform method nonlinear distortion does not occur, but if you want that after each rotation of the optimal PAPR must be calculated and need to pass a large amount of side information, large and complex delay, transmission side band information is also prone to error propagation.

[0005] 为此,结合两种降低峰均比的方法,本申请人在2006年2月8日在申请号为200610007411. 9中公开了一种峰值功率的方法。 [0005] To this end, a method of combination of both methods to reduce PAPR, the present applicant discloses a peak power of 8 February 2006, application number of 200610007411.9. 在本方法中,申请人通过对峰值功率点前后各N/2个数据符号与相同长度的削峰序列进行削峰处理。 In the present method, Applicant by clipping each sequence of N / 2 data symbols before and after the peak power point of the same length clipping process is performed. 由于削峰操作仅仅是简单的加减运算,而没有使用乘法运算,因而削峰的处理速度快且容易实现。 Since the clipping operation is just a simple addition and subtraction, multiplication and fast without the use of, thus clipping processing speed and easy to implement. 通过本发明的削峰处理,降低了峰均比。 By clipping process according to the present invention, the reduced PAPR.

[0006] TDD系统由于采用了智能天线, 基站发送DL (下行链路)数据每一次需要发送多套数据,每一套数据使用一根天线发送,每一套数据都有不同的波束加权因子用于波束赋形,波束加权因子是对UL (上行链路)数据进行信道估计得到。 [0006] TDD system due to the use of smart antenna base station transmits a DL (downlink) data need to send multiple sets of each data, each set of data transmitted using one antenna, each set of data has a different weighting factors with the beam in beamforming, the beam weighting factor is UL (up link) data for channel estimation obtained. 削峰处理是独立每一路数据进行削峰,并且,现有技术普遍采用的是数字内插法,即在时域检测到的峰值数据与预设的削峰脉冲系数相加减,好比输入的数字信号插入一个削峰序列,由于现有的削峰序列是固定的,不能根据幅度的变化自适应的调节削峰序列,容易造成数据相位的失真。 Clipping processing is performed independently for each data path clipping, and the prior art is widely used digital interpolation, i.e., the peak time domain data of the detected pulse with the preset clipping coefficient addition and subtraction, like input clipping signal into a digital sequence, since the sequence of the conventional clipping is fixed and can not adaptively change in accordance with the amplitude adjustment sequence clipping, likely to cause distortion of the data phase. 如果削峰处理破坏了数据的相位,那么智能天线的波束赋形作用将遭受破坏。 If clipping treatment destroys the phase data, then the action of beamforming of smart antenna will be destroyed. 另外,就算使用单天线系统(例如TD-SCDMA的微基站),如果信号的相位关系遭到破坏,也会使得接收端解调造成比较大的误差。 Further, even if the use of a single antenna system (e.g., the micro base station TD-SCDMA), if the destruction of the phase relationship signals, so that the receiving end will result in larger errors demodulated.

[0007] 另外,尽管某些时刻峰均比比较大,但是信号的平均功率比较小,此时的峰值功率仍然低于功放的IdB压缩点,而现有方案通常还会进行削峰处理,这种削峰处理方式增加了整个信号发送处理过程的处理时间及处理难度,最重要的是对载波数据进行削峰处理,存在着信号失真的问题。 [0007] Further, although some time is relatively large peak to average ratio, the average power of the signal is relatively small, peak power at this time still below IdB compression point of the amplifier, and the existing solutions typically will peak cut process, which kind of clipping treatment increases the processing time and the difficulty of dealing with the whole process of signal transmission process, the most important is the peak cut carrier data processing, there is the problem of signal distortion. 也就是说,现有技术仅仅考虑载波数据的峰均比来决定削峰,不仅增加处理的难度而且也存在信息失真的问题。 In other words, the prior art only consider PAPR carrier data to determine clipping, not only increase the difficulty of treatment and there is the problem of information distortion.

[0008] 还有,现有技术在削峰处理时通常是将峰值功率调整到预先设定的门限功率。 [0008] In addition, the prior art is usually the peak power is adjusted to a predetermined threshold power at the clipping process. 在设定门限功率时,没有考虑到峰值出现的概率,使得峰值功率点设置过大或过小,进而引起数据更大的失真。 When setting the threshold power, without taking into account the probability of occurrence of the peak value, so that the peak power point set is too large or too small, thereby causing a larger data distortion. 比如,对于功放来说,如果某一种峰值功率出现的概率非常小,例如超过信号峰均比PAR (peak to average power raio :PAR = 15dB的概率只有万分之一,可以不考虑削峰。如果超过PAR = 15dB的概率达到百分之一,需要考虑削除。 For example, for the amplifier, the probability that if a certain kind of peak power appears very small, for example, than the signal PAR PAR (peak to average power raio: PAR = 15dB probability of only one ten thousandth, may not consider clipping. If more than PAR = 15dB up to one percent probability, need to be considered deleted.

发明内容 SUMMARY

[0009] 本发明的一目的在于提供一种TDD多频点通信系统中削除峰值功率的方法及实现削除峰值功率的通信端,以解决现有技术削峰序列固定,由此造成破坏数据相位的问题。 [0009] The object of the present invention is to provide a method of multi-deleted TDD frequency peak power and a communication system for communication terminal deleted peak power to solve the prior art clipping fixed sequence, thereby causing damage to data phase problem.

[0010] 为了达到本发明,本发明提供了一种削除峰值功率的方法,包括:(1)经调制扩频后的每一路信号进行内插滤波,变频成不同频点信号;(2)所有频点信号在时域上进行线性叠加;(3)依据幅度变化调节的削峰序列对叠加后需要削峰的信号进行对削,所述需要削峰的信号的峰均比dB数和均值功率dB数之和大于或大于等于预设的检测功率dB数,所述检测功率小于等于IdB压缩点输入功率值。 [0010] For purposes of this invention, the present invention provides a method of deleted peak power, comprising: (1) performing interpolation filter in each channel by spreading the modulated signal, frequency signals into different frequency; (2) all frequency signal in the time domain linear superposition; PAPR (3) of the superposed signal need to be cut according to the clipping amplitude variations clipping adjustment sequence, said desired signal and clipped the average power in dB dB greater than the sum of the number of detections is greater than or equal to a predetermined dB of power, the detected power is less than equal to the input power value IdB compression point.

[0011] 步骤(3) 中依据幅度变化调节削峰序列包括通过以下步骤计算本次I路削峰序列hi :al :利用公式 [0011] Step (3) in accordance with changes in the amplitude adjustment sequence comprises calculating the current clipping path clipping sequence hi I by the steps: al: using the formula

Figure CN101150357BD00051

„计算I路幅度调节的最大数值hiniax,其中,pow_max0为目标功率,Imaxjl是pow_maxQ对应的I路数 "Amplitude adjusting the I calculated maximum value hiniax, wherein, pow_max0 target power, Imaxjl is large ones corresponding I pow_maxQ

值, value,

Figure CN101150357BD00052

对应的Q 路数值;a 2:利用 Corresponding to the Q value; a 2: using

Figure CN101150357BD00053

scalmg—i 计算本次削峰的I路幅度调节因子walingj,其中&为预先设 scalmg-i I calculated this way clipping amplitude adjustment factor walingj, which is previously set &

定的I路削峰序列;a3:利用4 = 计算本次I路削峰序列么,其中及 I clipping path given sequence; a3: = 4 is calculated using the current clipping path sequence Mody I, and wherein

为预先设定的I路削峰序列。 Clipping the I sequence is set in advance.

[0012] 步骤(3)中依据幅度变化调节削峰序列包括通过以下步骤计算本次Q路削峰序列:bl :利用公式欠黯 [0012] Step (3) in accordance with changes in the amplitude adjustment sequence comprising this clipping path clipping sequence Q calculated by the following steps: bl: less dark using the formula

Figure CN101150357BD00054

计算Q路幅度调节的最大数值 Calculating the Q value of the maximum amplitude adjustment

hqmax ,其中,pow_max0 为目标功率,Qmaxjl 是pow_maxQ 对应的Q 路数值 hqmax, wherein, pow_max0 target power, Qmaxjl is the Q value corresponding to pow_maxQ

Figure CN101150357BD00055

为PowjIiaxc1对应的I路数值;b2 :利用 The I value for the corresponding PowjIiaxc1; b2: using

Figure CN101150357BD00056

计算本次削峰的Q路幅度调节因 The calculation of the clipping path amplitude adjustment factors Q

子scaling_q,其中k为预先设定的Q路削峰序列;b3:利用hfl=scaling_q 计算本次Q路削峰序列,其中il为预先设定的Q路削峰序列。 Sub scaling_q, the Q wherein k is a predetermined sequence of clipping; b3: hfl = scaling_q calculated using this sequence clipping path Q, where Q is the il clipping path predetermined sequence.

[0013] 步骤(3)中对削处理为:若峰值功率对应的I路数据大于零,则预先保存的本频点数据符号的I路数据与本次I路削峰序列ki对应位相减,否则预先保存的本频点数据符号的I路数据与本次I路削峰序列Iii对应位相加;若峰值功率对应到的Q路数据大于零,则预先保存的本频点数据符号的Q路数据与本次Q路削峰序列ha对应位相减,否则预先保存的本频点数据符号的Q路数据与本次Q路削峰序列对应位相加。 [0013] Step (3) in the handling of cut as: I I channel data if the data path corresponding to the peak power is greater than zero, the previously stored data according to the symbols and the frequency of this sequence ki corresponding to the I-path clipping reduction phase, otherwise, the I data stored in advance according to the frequency of data symbols in this sequence I Iii clipping path corresponding bit sum; If the peak power corresponds to the Q channel data is greater than zero, according to the pre-stored frequency data symbols Q Q channel data Q channel data with the current clipping path corresponding to the phase sequence Save ha, or pre-stored according to the frequency and the current data symbol sequence corresponding bit clipping path Q are added.

[0014] 预先保存的本频点数据符号为功率超过门限功率的数据符号。 [0014] This pre-stored frequency data symbol is a data symbol power exceeds the threshold power.

[0015] 步骤(3)中需要削峰的信号为:所述信号的峰均比dB数和均值功率dB数之和大于或大于等于预设的检测功率dB数,所述检测功率小于等于IdB压缩点输入功率值。 [0015] Step (3) clipped signals required: the number of dB peak to average ratio of the number and the average power is greater than or greater than the number of dB, and dB equal to the preset power detection signal, the detection power is less than or equal IdB input compression point power value.

[0016]所述检测功率Pin,_为:Pin,_=Pin,ldB-X 0彡X彡3dB,其中,Pinade为IdB压缩点输入功率值,X为IdB回退值。 [0016] The detected power Pin, _ is: Pin, _ = Pin, ldB-X 0 X San San 3dB, wherein, Pinade IdB compression point is the input power value, X is IdB backoff value. X为IdB回退值,X是根据系统要求的邻信道泄露功率比ACLR进行设置,系统要求的ACLR越高,X设置越大。 X is a backoff value IdB, X is a leakage power ratio ACLR is set according to system requirements, adjacent channel, ACLR higher system requirements, the larger the set X.

[0017] 步骤(3)之前还包括:根据对误码率要求设置本次业务对应的逆累计概率分布函数CCDF值,获得CCDF值对应的参数峰均比;步骤(3)中的所述需要削峰的信号还包括为峰均比大于等于所述参数峰均比的信号。 [0017] Before step (3) further comprising: the setting of this inverse cumulative probability distribution function CCDF service corresponding to the value corresponding to the value of the parameter obtained CCDF of PAPR error rate requirements; the (3) step requires further comprising a clipping signal peak to average ratio is greater than or equal to the parameter signal PAPR.

[0018] 一种实现削除峰值功率的通信端,包括:若干内插滤波器:用于将经过调制扩频后的一路数据进行L倍内插滤波;若干变频器:用于对内插后的数据变频至一对应频点数据;一叠加器:连接所有变频器,用于将变频后所有频点数据在时域上进行线性叠加,线性叠加后的信号分I路数据与Q路数据分别进行缓存;削峰判断单元:用于将峰均比与均值功率之和大于或大于等于预设的检测功率的信号才进行削峰处理,所述检测功率小于等于IdB压缩点输入功率值;内插削峰器包括:幅度调节最大值计算子单元:用于计算I路幅度调节的最大数值和Q路幅度调节的最大数值;幅度调节因子计算子单元:用于计算本次I路幅度调节因子和Q路幅度调节因子;本次削峰序列计算子单元:用于计算本次I路削峰序列和Q路削峰序列;加法器:用于将预先保存的本频点数据符 [0018] one implementation, the peak power of the deleted communication terminal, comprising: a plurality of interpolation filter: means for interpolation filtering for the L-times all the way through spread spectrum modulated data; a plurality of drive: for the interpolation after data conversion to a corresponding frequency data; a stacker: connecting all the drive, for all frequencies after the frequency conversion data is superimposed on a linear time domain signal components I channel data and Q channel data linear superposition respectively buffer; clipping judgment unit: the peak to average ratio for the sum of the mean power is greater than or equal to a preset detecting signal power is greater than before the peak cut process, the detected power is less than equal to the input power value IdB compression point; interpolation clipping comprises: adjusting the amplitude maximum value calculation subunit: means for calculating the amplitude adjusting the I and Q maximum value of the maximum amplitude adjustment value; amplitude adjustment factor calculation subunit: the calculation for amplitude adjustment factor and the I Q-path amplitude adjustment factor; the clipping calculation subunit sequence: this is used to calculate the I and Q sequences clipping clipping sequence; adder: the previously stored for the present frequency of the data symbols 号与本次削峰序列进行加减运算。 Adding or subtracting the number clipping this sequence.

[0019] 与现有技术相比,本发明在削峰过程中每次能够自适应调节削峰序列,减少相位失真和幅度失真。 [0019] Compared with the prior art, the present invention can adaptively adjust each clipping in the sequence clipping process to reduce phase distortion and amplitude distortion. 量化削峰对幅度和相位造成的损失主要看EVM。 Clipping quantify the loss of amplitude and phase due mainly to see the EVM. EVM (矢量幅度误差,Error Vector Magnitude)在TS 25. 101 V3. 2. 2中定义为:所测量的波形和调制波形的理论值之间的差别。 The EVM (error vector magnitude, Error Vector Magnitude) is defined in TS 25. 101 V3 2. 2 as: The difference between the theoretical value and the modulation waveform of the measured waveform. EVM是平均错误矢量的能量与平均参考信号能量的比率的平方根植,并以a%的形式给出。 EVM is the square root of the ratio of the average plant reference average signal energy of the error vector energy given in the form of a%. EVM是数字通信系统中一个重要的衡量调制质量指标。 EVM is a digital communication system is an important measure of the modulation quality indicators. 第三代移动通信系统(WCDMA,CDMA2000,TD-SCDMA)协议规定调制精度采用EVM来衡量。 Third generation mobile communication system (WCDMA, CDMA2000, TD-SCDMA) protocol using a predetermined modulation accuracy is measured EVM. 是设备入网测试的强制指标。 Mandatory indicators of network testing equipment. 本发明通过自适应调节削峰序列,能够使得EVM的恶化得到改善。 The present invention is adjusted by adaptively clipping sequence, so that the deterioration of the EVM can be improved.

[0020] 本发明只对峰均比dB数和均值功率dB数之和大于或大于等于预设的检测功率dB数的信号,才进行削峰处理,对不满足条件的信号,不进行削峰处理。 [0020] The present invention is only the sum of the number of dB peak to average ratio and the average power is greater than or equal to a preset dB and the power detection signal is greater than the number of dB only for peak clipping process on the signal condition is not satisfied, without clipping deal with. 通过本发明,减少信号发射端的处理量,降低处理难度,同时降低了信息的失真。 By the present invention, to reduce the amount of processing the signal transmitting end, the difficulty reduction process, while reducing the distortion information. 并且,根据系统对ACPR的要求来设置门限功率,设置更可理。 Further, according to the requirements of the system to set ACPR threshold power, it can be provided more processing.

[0021] 本发明针对不同业务对误码率的要求设置对应的(XDF,根据CXDF值获得对应的参数峰均比,当信号的峰均比大于等于所述参数峰均比时,才将其进行内插法削峰,减少信 [0021] The present invention is set corresponding to (XDF for different service requirements on the error rate, obtained according to the corresponding parameters CXDF PAPR value, when the PAPR signal is greater than or equal to the parameter PAR, which is only clipping the interpolation method to reduce the letter

号失真。 No distortion.

附图说明[0022] 图1为本发明削除峰值功率的方法的流程图; 1 is a flowchart of a method of the present invention is deleted of peak power [0022] FIG 1;

[0023] 图2为均值功率低且峰均比变换范围大的情况示意图; [0023] Figure 2 is low and a large peak-to-average power situation schematic of the conversion range;

[0024] 图3为均值功率高且峰均比变换范围小的情况示意图; [0024] FIG. 3 is a high peak-to-average power and less schematic situation of the conversion range;

[0025] 图4为高性能ACPR下检测功率小于IdB压缩点示意图; [0025] FIG. 4 is a high-performance detection power is less than ACPR schematic IdB compression point;

[0026] 图5为TDD的数据信号的CXDF分布图; [0026] FIG. 5 is a TDD CXDF profile of the data signal;

[0027] 图6为利用上述自适应调节的削峰序列进行削峰处理前后的功率对照图; [0027] FIG. 6 is performed before and after the peak cut power control process using the above-described sequence adaptive adjustment of clipping;

[0028] 图7为I路数据幅度削峰前后的比较示意图; [0028] FIG. 7 is a schematic diagram comparing the data before and after the I amplitude clipping;

[0029] 图8为Q路数据幅度削峰前后的·比较示意图; [0029] FIG. 8 is a schematic diagram comparing before and after the Q-channel data amplitude clipping;

[0030] 图9为本发明削除峰值功率的一实例图; [0030] FIG. 9 deleted an example of the present invention, FIG peak power;

[0031] 图10为测试自适应削峰序列方法的示意图; [0031] FIG. 10 is a schematic diagram of an adaptive clipping test sequence method;

[0032] 图11为不同削峰目标数值对EVM的影响示意图; [0032] FIG. 11 is a different effect on EVM schematic clipping target value;

[0033] 图12为固定总功率测试ACPR的改善情况的示意图; [0033] FIG. 12 is a schematic view of a fixed total power improvement of test ACPR;

[0034] 图13为固定输出信号的功率查看总消耗功率的改善情况的示意图。 [0034] FIG 13 a schematic view of the improvement of the total power consumption for a fixed power output signal.

具体实施方式 Detailed ways

[0035] 以下结合附图,具体说明本发明。 [0035] conjunction with the drawings, detailed description of the present invention.

[0036] 请参阅图1,其为本发明削除峰值功率的方法的流程图。 [0036] Referring to FIG. 1, a flowchart of a method of the present invention, the peak power deleted. 它包括: it includes:

[0037] SllO :经调制扩频后的每一路信号进行内插滤波,变频成不同频点信号。 [0037] SllO: performing interpolation filter in each channel by a spread spectrum modulated signal, frequency-converted to a different signal.

[0038] 在信号进行内插滤波之前,可以在经调制扩频后的每一路数据的每一时隙上插上训练序列码,不同频点的训练序列码进行相关的相位偏转。 [0038] In the signal prior to interpolation filter, you can plug the training sequence code of each time slot on each channel data after spreading the modulated training sequence code is different from a frequency related to a deflection phase.

[0039] 根据现有TDD多频点方案,对于同一小区支持的多个频点有如下约定:主频点和辅频点使用相同的扰码和基本midamble (训练序列)码,因此各个频点的基本midamble码位置是完全对齐的,同时每个频点的基本midamble码都为相同的二进制序列向量。 [0039] The conventional multi-frequency TDD scheme, the same frequency for a plurality of cells supported by the following rules: frequency and the secondary frequency point using the same scrambling code and the midamble basic (training sequence) code, so each frequency the basic midamble code position is aligned perfectly, while the basic midamble code for each frequency point are the same binary sequence vector. 在发射端基本midambIe码部分就会出现由于峰峰迭加而产生更大的峰值功率,远远大于时隙内的数据功率。 MidambIe basic code portion occurs due to the transmission side have a greater peak superposition of peak power, power is much larger than the data in the slot.

[0040] 如果不同频点的Midamble码进行相关的相位旋转则中间Midamble码的功率接近于时隙内数据的功率,这个时候在随后削峰时一个时隙的峰均比将降得更低,并且Midamble码受损少。 [0040] If the different frequencies of Midamble codes related to phase rotation power is close to the intermediate power Midamble code data time slot, this time slot in a subsequent clipping peak to average ratio will drop even lower, Midamble codes and less damage.

[0041] 为此,只需在不同频点的Midamble码进行不同的相位偏转:Midamble码数据乘ieXp(j*(nl)*Ji),j为虚数符号,n为载波编号,n:l〜TDD多载波通信系统中每个小区的载波总数。 [0041] For this reason, only in Midamble codes of different frequencies of different phase-shift: Midamble code data by ieXp (j * (nl) * Ji), j is an imaginary number of symbols, is n-carrier number, n: l~ total number of carriers per cell in a TDD multi-carrier communication system. 对应地,在接收端的每一频点只需将Midamble码数据乘上 Correspondingly, at the receiving end each frequency simply Midamble code multiplied data

exp (_j* (n_l) * )即可。 exp (_j * (n_l) *) can be.

[0042] 如,支持三频点的TDD通信系统,可以在第二个频点的Midamble码进行180度的偏转,而第一个频点和第三个频点的Midamble码进行0度和360度旋转,如同没有偏转,所以此种相位旋转方法最简单易行,并且效果明显。 [0042] e.g., tri-band TDD communication system of the point to be deflected 180 ° in the second frequency point Midamble code, Midamble code and a first frequency and the third frequency is 0 degree and 360 degrees of rotation, as there is no deflection, the most simple method of such phase rotation, and the effect is obvious.

[0043] 再比如,支持六频点的TDD通信系统,是第二个频点、第四个频点、第六个频点的Midamble码进行180度的偏转。 [0043] As another example, a communication system supporting TDD six frequency is the second frequency, a fourth frequency, the sixth frequency of Midamble codes deflection of 180 degrees.

[0044] 以此类推,对于多频点的TDD通信系统,编号为偶数频点的Midamble码数据进行180度的偏转,编号为奇数频点的Midamble码数据不进行旋转。 [0044] and so on, for the TDD communication system of multi-frequency, Midamble code data of even numbered frequency deflection of 180 degrees, the odd numbered frequencies Midamble code data is not rotated. 当然在接收端也要进行对应的处理。 Of course, also a corresponding process performed at the receiving end.

[0045] 不同频点的Midamble码进行不同的相位偏转的方法还有很多,在此就不再举例,由于继承了物理层使用相位偏转的方法使得后面的削峰处理可以更多的针对业务数据部分的功率,并且使得Midamble码的峰值起伏接近,在进行信道估计时能够更加准确,并且Midamble码受损小,使得信道估计更准确。 Method [0045] Midamble codes different from a frequency of the phase-difference of deflection, there are many, this example is no longer, since the inherited methods of using physical layer such that the phase-shifted behind clipping processing may be more traffic data portion of a power, and such that the peak of the undulations close Midamble codes, channel estimation can be performed more accurately when the code is damaged and Midamble small, so that more accurate channel estimation.

[0046] S120 :所有频点信号在时域上进行线性叠加。 [0046] S120: linear signals of all frequencies superimposed in the time domain.

[0047] TDD通信系统的物理层数据先经过调制,扩频加扰组成一帧数据,传输速率是1.28Mps。 [0047] The physical layer of the TDD communication system to a data modulated, spreading a composition scrambled data transfer rate is 1.28Mps. 在数字中频进行L倍内插(L内插倍数),使其成高速数据。 Interpolation (the interpolation factor L) within the digital IF L times, to make high-speed data. 比如L为60,内插后的速率达到76.8Mps。 L is for example 60, the interpolation rate reaches 76.8Mps. 同时对内插后多路物理层数据在频域进行频点搬移,在时域进行线性叠加。 Meanwhile the internal multiplex physical layer data frequency shift in the frequency domain after the interpolation, linear superposition in the time domain. 所以多频点通信系统信号在进入削峰之前的数学表达式为: Therefore, the mathematical expression multi-frequency communication system signal before entering the clipping is:

Figure CN101150357BD00081

[0050] 式中VM是频点m特有的扩频码:扩频码c(k)和小区扰码V的组合可以看作是一个用户和小区特有的扩频码,不同的频点使用不同的扰码: [0050] wherein VM is the frequency spreading code specific to m: a combination of a spreading code c (k) and V cell scrambling code can be seen as a cell and a user-specific spreading codes, different frequencies using different the scrambling:

Figure CN101150357BD00082

[0052] Q为归一化以后的扩频码长度,对于TD-SCDMA来说长度是16,N为信道编码调制以后的一个码道占用的符号量,归一化后的长度为22,Xk是幅度调节因子,是根据功率换算得到。 [0052] Q is normalized after a spreading code length of, for TD-SCDMA is the length is 16, N is the amount of code channel symbols occupied after channel coding and modulation, the normalized length is 22, Xk is the magnitude adjustment factor, is obtained according to the power converter. Crtl(t)是在t时刻余弦滤波器系数。 Crtl (t) is the raised cosine filter coefficients at time t. Oci是中频的中心频点,0^为每一个频点所占用的频带带宽。 Oci IF center frequency, frequency bandwidth ^ 0 for each frequency point occupied.

[0053] 此时定义了峰均比是在一段时间内峰值功率与其平均功率的比值,依照定义: [0053] In this case defines the ratio of the peak power is the peak-average power thereto over a period of time, by definition:

Figure CN101150357BD00083

[0055] Lm是midamble数据的长度为144chip,Nts是参与PAPR计算个时隙数,Nintoptjlate [0055] Lm is the length of the midamble data is 144chip, Nts involved PAPR calculated number of time slots, Nintoptjlate

是在中频进行内插的因子,本实施例中TDD通信系统在中频进行L(L=60)倍内插,所以N =T Is inserted in the middle frequency factor, the present embodiment for the TDD communication system fold interpolation L (L = 60) at an intermediate frequency, so N = T

”interpolate ° "Interpolate °

[0056] 从公式4-1可知,数据符号的峰值功率与调制方式、逻辑用户数、频点的个数都有关系,随着频点数和用户数的不断增多,峰均比将越大。 [0056] apparent from equation 4-1, the peak power of data symbols and the modulation scheme, the logical number of users, the number of frequency have a relationship, with the increasing number of frequencies and the number of users, the peak to average ratio increases.

[0057] S130:依据幅度变化调节的削峰序列对叠加后需要削峰的信号进行对削。 [0057] S130: After the superposed signal need to be clipped to the clipping amplitude variations based on the clipping adjustment sequence.

[0058] 需要削峰的信号可以是指峰均比dB数和均值功率dB数之和大于或大于等于预设检测功率dB数的信号,所述检测功率小于等于IdB压缩点输入功率值。 [0058] The signal may require clipping means the sum of peak to average ratio in dB, and dB and average power greater than greater than or equal to a preset number of dB power detection signal, the detection power less input power value IdB compression point.

[0059] 有时候尽管峰均比比较大,但是信号的平均功率比较小,若此时的峰值功率仍然低于预设的检测功率,比如,峰值功率低于功放的IdB压缩点,信号的峰值功率最好不要削除。 [0059] Although sometimes PAR is relatively large, but the average power of the signal is relatively small, at this time if the peak power is still lower than the preset power detection, for example, the peak power is lower than IdB compression point of the amplifier, peak signal power is best not deleted.

[0060] 请参阅图2,其为均值功率低且峰均比变换范围大的情况示意图。 [0060] Please refer to FIG. 2, which is a schematic diagram of a low peak-to-average power and the case where a large conversion range. 请参阅图3,其为均值功率高且峰均比变换范围小的情况示意图。 Refer to FIG. 3, which is a schematic view of high average power and peak-range situation transformations. 在某一时刻,对于功放来说,重要的是这一时刻的最大功率点(均值+峰均比=峰值),即不是均值功率也不是峰均比,只要峰值功率不大于预设的检测功率,信号失真就很小。 At some point, for the amplifier, it is important that the maximum power point of the moment (mean + PAR = peak), that is not the average power is not the PAR, as long as the peak power is not greater than the preset detection power , signal distortion is very small. 如果信号输入信号的功率已经超出功放的IdB压缩点,并且输入信号的功率继续增加,那么信号的ACPR会急剧恶化,例如输入信号超过IdB压缩点,如果信号继续增加,每增加ldB,那么系统中的ACPR的指标可能会恶化3dB。 If the power of the signal of the input signal is beyond IdB compression point of the amplifier, and input power continues to increase signal, then the ACPR will signal a sharp deterioration, such as the input signal exceeds IdB compression point, if the signal continues to increase each additional ldB, then the system the ACPR indicators may worsen 3dB. 由于输入信号到达IdB压缩点的时候信号就已经有IdB的失真。 Since the input signal reaches IdB compression point of time there were already IdB signal distortion. 这个时候ACPR已经开始恶化了,所以系统要求的ACPR指标很高的话,那么输入的信号还只能小于IdB压缩点,只有这样系统的ACPR才能达到很好的效果。 This time ACPR has started to deteriorate, so the system requires a high index of ACPR, then the input signal can only be less than IdB compression point, the only way the system ACPR in order to achieve good results.

[0061] 为此,本发明提出信号的峰均比PARP(dB)和均值功率之和大于或大于等于预设的检测功率Pin,_,才进行削峰处理。 [0061] For this reason, peak to average ratio PARP (dB) of the present invention provides a signal and average power greater than the sum is greater than or equal to a preset detected power Pin, _, only peak cut process. 即, which is,

[0062] PARP (dB) +IOlog10 pow—mean>Pin,max (4-4) [0062] PARP (dB) + IOlog10 pow-mean> Pin, max (4-4)

[0063]或 [0063] or

[0064] PARP (dB) +IOlog10 pow—mean > Pin,max (4-5) [0064] PARP (dB) + IOlog10 pow-mean> Pin, max (4-5)

[0065]检测功率Pin,■为 [0065] The detected power Pin, ■ is

[0066] Pin,fflax=Pin,ldB-X 0 彡X 彡3dB (4-6) [0066] Pin, fflax = Pin, ldB-X 0 X San San 3dB (4-6)

[0067] 其中,Pin,ldB为IdB压缩点输入功率值,X为IdB回退值。 [0067] wherein, Pin, ldB IdB compression point of the input power value, X is IdB backoff value. IdB回退值X是根据系统要求的邻信道泄露功率比ACLR进行设置,系统要求的ACLR越高,X设置越大。 IdB backoff value X is based on system requirements leak Adjacent channel power ratio setting ACLR, higher system requirements ACLR, X larger set.

[0068] 由于输入信号进入IdB压缩点时,已经不是线性增益,所以对于ACPR要求高的系统,工作在功放的线性区,将不会或者产生很小的失真,这时ACPR的性能就会好,因此检测功率应该小于等于IdB压缩点的输入功率。 [0068] When the input signal enters IdB compression point gain is not linear, so the requirements for high ACPR system works in the linear region of the amplifier, the distortion causes little or not, at this time will be better ACPR performance , the detection power should be less than or equal IdB compression point of the input power. 请参阅图4,其为高性能ACPR下检测功率小于IdB压缩点示意图。 Please refer to FIG. 4, which is less than IdB compression point is a schematic diagram of a power detector with high performance ACPR. 检测功率应该小于Pin,max,即: It should be less than the detected power Pin, max, namely:

[0069] PARP (dB) +IOlog10 pow_mean>Pin,max (4-7) [0069] PARP (dB) + IOlog10 pow_mean> Pin, max (4-7)

[0070]其中 pow_mean = mean{| x[m] 2} ,0 ^ m ^ (2NQ+LJ • Nts • Ninterpolate (4-8) [0070] wherein pow_mean = mean {| x [m] 2}, 0 ^ m ^ (2NQ + LJ • Nts • Ninterpolate (4-8)

[0071] 此时设置输入功放的信号最大功率为powjnaXd,根据公式4_7得到: [0071] At this time, the amplifier input signal is provided to maximum power powjnaXd, 4_7 obtained according to the formula:

[0072] pow_max0 (dB) =Pin, -=Pinatff1-X (4-9) [0072] pow_max0 (dB) = Pin, - = Pinatff1-X (4-9)

[0073] 如果X=OdB,那么最大输入功率就等于IdB压缩点的输入功率,并且X越大就表明系统要求的ACPR越高。 [0073] If X = OdB, then the maximum input power of the input power is equal to IdB compression point, and X indicates that the larger the higher system requirements on ACPR.

[0074] 输入功放的信号最大功率为powjnaxc!,通常输入功放的信号最大功率也称之为目标功率。 [0074] The maximum power of the amplifier input signal is typically powjnaxc !, maximum power input signal is also referred to as a target power amplifier. 在削峰处理过程中,需要将信号的功率削峰到目标功率以下。 In the clipping processing, the power signal to the target power need less clipping. 本发明再给出一个门限功率detectjhreshold,输入到削峰处理器中的都是一串联的数据符号,一个定时周期输入一个数据,如果采样时钟周期为76. 8MSPS,则输入数据符号的周期为1/76. 8微秒,为此只要判断输入的信号功率只要大于门限功率detectjhreshold,就需要将此信号的功率削除到powjnaXd以下,在许多情况下detect_threshold与Powjiiaxc1数值接近或者相等,本发明设定目标功率与门限功率相等。 The present invention is further a given threshold power detectjhreshold, data symbols are input to a series of clipping processor, a data input timing cycle, if the cycle of the sampling clock 76. 8MSPS, the input data symbols for the period 1 / 76.8 microseconds, is determined for this purpose as long as long as the input signal power exceeds a threshold power detectjhreshold, this would require a power signal to the deleted powjnaXd less, detect_threshold Powjiiaxc1 near or equal to the value in many cases, the present invention sets the target equal power and threshold power.

[0075] 本发明可以只对峰均比dB数和均值功率dB数之和大于或大于等于预设的检测功率dB数的信号,才进行削峰处理,对不满足条件的信号,不进行削峰处理。 [0075] The present invention may be only the sum of the number of dB peak to average ratio and the average power is greater than or equal to a preset dB and the power detection signal is greater than the number of dB only for peak clipping process on the signal condition is not satisfied, not cut peak processing. 通过本发明,减少信号发射端的处理量,降低处理难度,同时降低了信息的失真。 By the present invention, to reduce the amount of processing the signal transmitting end, the difficulty reduction process, while reducing the distortion information. 并且,根据系统对ACPR的要求来设置门限功率,设置更合理。 Further, according to the requirements of the system to set ACPR threshold power, provided more reasonable.

[0076] 由于观测时间的长短不同,所得到的峰值可能不同这个时候,因而单纯的考虑PAR已经没有太大的意义,更关心的是峰均比的统计信息,即需要从概率的角度来描述PAPR,通常用CCDF (Complementary cumulative distribution function)曲线可直观的表达TDD系统PAPR的分布。 [0076] Depending on the length of observation time, the resulting peak may be different this time, and therefore simply consider PAR has not much sense, more concerned with statistics PAR, that needs to be described from the viewpoint of probability PAPR, normally the expression profile curve intuitively TDD system with a PAPR CCDF (Complementary cumulative distribution function). 本发明中如果峰值出现的小于一定的概率(例如:万分之一),则不再考虑此峰值点。 If a peak appears in the present invention is less than a certain probability (for example: parts per million), this is no longer considered a peak point.

[0077] CCDF是一种概率分布,对于功放来说如果某一种峰值功率出现的概率非常小,例如超过PAR=40dB的概率只有万分之一,小概率的峰值功率点对于系统造成的失真、恶化很小,此时的峰值功率点就可以忽略或者不考虑,所以本专利设置一定概率下的峰值都需要考虑,而小于一定概率下的峰值可以忽略,这样就使得的门限功率的设置更合理。 [0077] CCDF is a probability distribution for the power amplifier is if the probability of occurrence of a certain kind of peak power is very small, for example, more than PAR = 40dB probability of only one ten thousandth, the small probability of the peak power point for the distortion caused by the system , the deterioration is small, peak power at this time point may or may not be considered negligible, so this patent provided a peak at a certain probability need to be considered, while the peak at less than a certain probability can be ignored, so that the power threshold setting more reasonable.

[0078] 设置门限峰均比PAPRtl为 [0078] set the threshold for the peak to average ratio PAPRtl

Figure CN101150357BD00101

[0080] 任意一是时刻的PAPR为: [0080] PAPR any time one is as follows:

Figure CN101150357BD00102

[0082] 那么逆累计概率分布函数(XDF: [0082] then the inverse cumulative probability distribution function (XDF:

[0083] CCDF=Prob[PAPR>PAPRJ (4-12) [0083] CCDF = Prob [PAPR> PAPRJ (4-12)

[0084] 依据CCDF分布函数,本发明提出根据实际需要选择一个合适的PARPtl作为发射功率的变化范围来代替理论上的最大PAPR,比如对于误码率要求较低的语音信号,可以选取CCDF=IO-3对应的那个PAPRtl的值作为对射频功放的要求,而对于误码率要求高的数据传输,可以选择更高的CCDF对应的PAPRtl来作为期望的放大器线性范围。 [0084] According distribution function CCDF, the present invention proposes to replace the theoretical maximum PAPR according to actual needs to select an appropriate PARPtl as the transmission power variation range, such as a lower error rate for the speech signal requirements, can be selected CCDF = IO -3 PAPRtl that value corresponding to a RF power amplifier requirements, and require a high error rate for data transmission may be selected corresponding to the higher CCDF PAPRtl as the desired linear range of the amplifier. 请参阅图5,其为TDD的数据信号的CXDF分布图。 Refer to FIG. 5, which CXDF map data for a TDD signal. 未削峰前最大的峰均比值PAR达到8. 59dB,到达此峰均比的信号的概率不足千分之一,在功放时可以忽略其影响的。 Not before clipping the largest peak to average ratio PAR reached 8. 59dB, the probability of this peak to average ratio of the signal reaches less than one-thousandth, when the amplifier can ignore its impact. 在CCDF=10_3这个点对应的PAR(PAR=PAPR0)是7. 98dB,此时的峰均比就必须予以考虑,所以削峰的目的很明确了,就是要把输入信号CCDF=10_3对应的峰值功率削除。 In the CCDF = 10_3 this point corresponding PAR (PAR = PAPR0) is 7. 98dB, at this time of the peak to average ratio must be taken into account, so the clipping of purpose is very clear, it is to take the input signal CCDF = 10_3 corresponding peak power deleted.

[0085] S卩,削峰前还包括:根据对误码率要求设置本次业务对应的逆累计概率分布函数CXDF值,获得CXDF值对应的参数峰均比; [0085] S Jie, before clipping further comprising: the setting of this inverse cumulative probability distribution function corresponding to the service CXDF value, corresponding to the value of the parameter obtained CXDF PAPR bit error rate requirement;

[0086] 削峰处理时包括:找到峰均比大于等于所述参数峰均比的信号,若所述峰值功率大于预设的门限功率,内插法削除峰值。 It includes [0086] clipping process: found greater than or equal to the peak to average ratio PAR parameter signal, if the peak power is greater than the preset threshold power, the peak interpolation deleted.

[0087] 还是请参阅图5,削峰前(XDF=10_3对应的PAR=7. 98,削峰以后(XDF=10_3对应的PAR=5. 8,则说明在千分之一概率点,峰均比改善了大概7. 98-5. 8=2. 18dB左右。 [0087] See also FIG. 5, the front clipping (XDF = 10_3 corresponding PAR = 7. 98, after clipping (XDF = 10_3 corresponding PAR = 5. 8, then the probability of one-thousandth point peak improved than about 7. 98-5. 8 = about 2. 18dB.

[0088] 为了削峰前后相位损失最小,在设置削峰序列中最需要考虑到相位对应,本发明根据以下步骤做到自适应地调整削峰序列。 [0088] In order to minimize the loss of phase before and after clipping, the clipping set most sequence corresponding to the phase needs to be considered, the present invention is to achieve adaptively adjusted according to the following sequence of steps clipping.

[0089] 输入信号中某一段时间内一个最大功率点的功率大于门限功率(峰值检测电路检测出峰值功率点): [0089] The input signal power maximum power point of a certain period of time greater than the threshold power (peak detection circuit detects a peak power point):

[0090] pow_maxm>detect_threshold (4-13) [0090] pow_maxm> detect_threshold (4-13)

[0091 ]其中pow_maxm:pow_maxm=max(powm) =Imax2+Qmax2 (4-14) [0091] wherein pow_maxm: pow_maxm = max (powm) = Imax2 + Qmax2 (4-14)

[0092] 则使用数字内插法进行数字削峰,削峰处理是I路数据和Q路数据分别减去内插滤波器系数,同时可以根据输入信号的Q路和I路得到峰值功率点的相位,注意此时输入削峰序列的信号都是复数,实部是I路,虚部是Q路,所以每输入一个复数符号就可以得到此复数符号的相位:[0093] [0092] The interpolation method using a digital digital clipping, clipping processing is the I data and the Q data interpolation filter coefficients are subtracted, the peak power can be obtained at the same time point based on the input signal and the Q channel I phase Note clipping when the input signal sequence are complex, the real part is the I, Q is the imaginary part of the road, so that each input complex symbol can be obtained in this phase of the complex symbols: [0093]

Figure CN101150357BD00111

[0094] 输入信号峰值点的相位也是I路和Q路削峰序列的相位,削峰序列最大功率点的相位与峰值功率点的信号相等。 [0094] The phase of the input signal peak point I and Q branches are clipping phase sequence, and phase of the signal is equal to the peak power point in the sequence clipping maximum power point. 同时每一路数据与各自的削峰序列对削后其峰值功率点必须等于目标功率点,所以可以推导出 While each data channel with the respective sequences clipping peak power must be equal to the target cut point after power point, it can be deduced

[0095] [0095]

Figure CN101150357BD00112

[0096] 可以得到每一路(I路、Q路)幅度调节的最大数值 [0096] can be obtained in each channel (I channel, Q channel) regulated maximum amplitude value

[0097] [0097]

[0098] [0098]

Figure CN101150357BD00113

[0099] 使用本发明可以使得相位损失最小,从下面的仿真结果可以得到证明。 [0099] The invention can minimize the loss of such a phase, the simulation results from the following can be proved. 由于削峰序列本质是一个线性相位的FIR滤波器系数,数值是固定的。 Since the clipping is essentially a sequence of linear phase FIR filter coefficients, the value is fixed. 但是输入信号的峰值功率点每一次都可能不同,因此每一次要削除掉的功率值不同,也就是每一次每一路削除掉的幅度不同,求得每一路需要削除的幅值后,就可以求得每一次的幅度调节因子: However, the peak power of the input signal each time point may be different, so each secondary cutting removal of different power values, i.e. different in each channel every time the amplitude of the removed cut, the need for each channel obtained amplitude deleted, can order each have an amplitude adjustment factor:

[0100] [0100]

[0101] [0101]

Figure CN101150357BD00114

[0102] 根据每一次得到的幅度调节因子就可以自适应的调节每一次削峰序列的幅度,在这其中包含着相位的对应关系。 [0102] The obtained amplitude adjustment every time adjustment factor can be adaptive amplitude clipping every sequence, in which the phase contains correspondence relationship.

[0103] [0103]

[0104] [0104]

Figure CN101150357BD00115

[0105]即, [0105] That is,

[0106] (I)依据幅度变化调节削峰序列包括通过以下步骤计算本次I路削峰序列il1: [0106] (I) according to the peak clipping amplitude adjustment sequence comprising a change in this sequence is calculated by the I clipping steps il1:

[0107] al:利用公式 [0107] al: using the formula

Figure CN101150357BD00116

计算I路幅度调节的最大数 Amplitude adjusting the I calculating the maximum number of

值himax,其中,pow_max0为目标功率,Imaxjl是pow_maxQ对应的I路数值 Value himax, wherein, pow_max0 target power, Imaxjl is pow_maxQ value corresponding to the I

Figure CN101150357BD00117

m m

Qmax_m为pow_maxQ对应的Q路数值; Qmax_m as the Q value corresponding to pow_maxQ;

[0108] a2:利用TCalingJ = 计算本次削峰的I路幅度调节因子scaling_i ; [0108] a2: calculated using the I TCalingJ = The peak clipping amplitude adjustment factor scaling_i;

[0109] a3:利用& = scaling_i *h计算本次I路削峰序列匕,其中b_为预先设定的I路削峰序列。 [0109] a3: & = scaling_i * h using this calculation sequence dagger clipping path I, where I is a predetermined b_ clipping path sequence.

[0110] (2)依据幅度变化调节削峰序列包括通过以下步骤计算本次Q路削峰序列: [0110] (2) adjustment based on change in amplitude clipping Q sequences comprises calculating the current path by the steps of clipping sequence:

[0111] bl:利用公式 [0111] bl: using the formula

Figure CN101150357BD00118

计算Q路幅度调节的最大数值hqmax,其中,pow—max。 The maximum value of the Q hqmax calculated amplitude adjustment, wherein, pow-max. 为目标功率,Qmax m 是pow—max。 Target power, Qmax m is pow-max. 对应的Q 路数值 Q path values ​​corresponding

Figure CN101150357BD00121

Imax_m为pow_maxQ对应的Q路数值; Imax_m as the Q value corresponding to pow_maxQ;

[0112] b2:利用 [0112] b2: using

Figure CN101150357BD00122

算本次削峰的Q路幅度调节因子scaling_q ; Q-path count for this clipping amplitude adjustment factor scaling_q;

[0113] b3:利用hfl=scaling_q *h计算本次Q路削峰序列,其中h为预先设定的Q路削峰序列。 [0113] b3: using hfl = scaling_q * h The Q calculation sequence clipping path, where h is the Q clipping predetermined sequence.

[0114] (3)步骤S130中对削处理为: [0114] (3) to cut the processing in step S130 is:

[0115] 若峰值功率对应的I路数据大于零,则预先保存的本频点数据符号的I路数据与本次I路削峰序列ki对应位相减,否则预先保存的本频点数据符号的I路数据与本次I路削峰序列Iii对应位相加;若峰值功率对应到的Q路数据大于零,则预先保存的本频点数据符号的Q路数据与本次Q路削峰序列对应位相减,否则预先保存的本频点数据符号的Q路数据与本次Q路削峰序列对应位相加。 [0115] If the I channel data corresponding to the peak power is greater than zero, then the I channel data according to pre-stored data symbols in frequency and this clipping path I phase corresponding to sequences ki Save, or pre-stored according to the frequency data symbols the I channel data I and the clipping path corresponding bit sequence summing Iii; if Q channel data corresponding to the peak power of the Q channel data is greater than zero, the previously stored data according to frequency and this Q symbol sequence clipping path Save the corresponding phase, or Q channel data according to pre-stored frequency point is added to the data symbols in the current clipping path Q corresponding bit sequence.

[0116] 预先保存的本频点数据符号为功率超过门限功率的数据符号。 [0116] This pre-stored frequency data symbol is a data symbol power exceeds the threshold power.

[0117] 根据上面一系列处理实现了削峰序列(内插滤波器系数)的幅度自适应调节的功能。 [0117] Clipping sequences to achieve a series of processes according to the above (interpolation filter coefficients) of amplitude adaptive function. 下面是对上述方法的仿真,当检测到一个峰值功率点,就把其功率削除到目标功率,同时周围波形起伏的趋势维持不变。 The following is a simulation of the above method, when a peak power point, the power put into the deleted target power, while the surrounding undulating waveform detected trend remain unchanged.

[0118] 请参阅图6,其为利用上述自适应调节的削峰序列进行削峰处理前后的功率对照图。 [0118] Referring to FIG 6, which is carried out using a clipping sequence of the above adaptive power control before and after the clipping processing. 从图上可知,从削峰处理前后功率对照来看满足了削峰前后的一致性。 Seen from the figure, the consistency before and after clipping to meet the power control before and after the clipping processing run. 请参阅图7,其为I路数据幅度削峰前后的比较示意图。 Please refer to FIG. 7, a schematic diagram comparing before and after the I channel data which is amplitude clipping. 请参照图8,其为Q路数据幅度削峰前后的比较示意图。 Referring to FIG 8, a schematic diagram comparing the data before and after the Q channel is clipping amplitude. 从图7和图8可知,每一种幅度也能够按照各自的比例进行自适应的调整。 , Each of the amplitude can be adaptively adjusted according to respective proportions from FIGS. 7 and 8 can be seen in FIG.

[0119]自适用调节削峰器不仅体现幅度的自适应调整,同时对输入信号的相位破坏最小。 [0119] Since clipping is applicable not only adaptive regulator adjustments, while minimal damage to the phase of the input signal. 假设此时I路数据的幅度比Q路数据的幅度大很多,若将I路数据和Q路数据削除相同的幅值,就算可以把峰值功率点正好削除到功率门限,那么输入信号的相位将会遭受很大的破坏,但如果采用上述自适应调节削峰序列的方法,I路和Q路数据的幅度按照削峰前的比例关系削除不同的幅度,削峰后相位破坏就相对少得多,由此进一步改善峰均比。 Many assuming that amplitude data of the I channel data Q is larger than the amplitude, if the I data and the Q data of the same magnitude deleted, even if the peak power point can be precisely deleted to power threshold, then the phase of the input signal suffer great damage, but if the above-described method of adaptive clipping sequences, amplitude I and Q channel data is deleted in the ratio of different magnitude before clipping, the clipping is much less relative phase corruption , thereby further improving PAR.

[0120] 通过改善峰均比,能够达到下述的技术效果: [0120] By improving PAR, can achieve the following technical effects:

[0121] I)提高多载波信号的发射功率,在总消耗功率基本不变的情况下也就提高了功放的效率;2)提高了功放的效率,当需要进行大功率输出时,就可以大大减少电源的供给功率,这样一方面节省了硬件成本,同时在一定程度上缓解了基站的散热问题,同时也节省运行维护的成本。 [0121] I) increase the transmission power of the multi-carrier signal, in the case of a substantially constant total power consumption will improve the efficiency of the power amplifier; 2) improve the efficiency of the power amplifier, when the required power output, can be substantially reducing the power supplied to the power source, so that to save on hardware costs, while alleviating the problem of heat dissipation of the base station to some extent, also the operation and maintenance cost.

[0122] 请参阅图9,其为本发明削除峰值方法的一实施示意图。 [0122] Please refer to FIG. 9, which is an embodiment of a method deleted peak schematic diagram of the invention. 线性叠加后的信号分I路数据与Q路数据分别进行缓存,获得峰值功率(S21 ),判断所述峰值功率是否大于等于检测门限(S22),若是,则自适应调整削峰序列,并对信号进行削峰处理得到削峰后的I路数据和Q路数据,否则,直接输出I路数据和Q路数据。 I channel signal component data and Q channel data of a linear superposition of buffers respectively, the peak power is obtained (S21), determines the peak power of not less than a detection threshold (S22), and if so, adjusting the adaptive clipping sequence, and clipping the signal processing data obtained clipping the I and Q data, or directly outputs the I data and the Q data. 本发明可以通过ACPR的要求来设置门限功率。 The present invention may be provided a threshold power required by the ACPR. 本发明还可以所述信号的峰均比dB数和均值功率dB数之和大于或大于等于预设的检测功率dB数判断是否进行削峰处理,或者本发明还可以进一步考虑信号的峰均比是否大于等于根据CCDF值来设置的参数峰均比,若是,才进行削峰处理。 And the sum of the number of dB dB peak-average power of the present invention may also be the signal is greater than greater than or equal to a preset number of dB is determined whether the detected power peak cut process or the present invention may further consider the signal PAR PAPR is greater than equal to the parameter value set according to the CCDF, if only for peak clipping process.

[0123] 削峰处理包括两过程:第一过程是获得本次I路削峰序列和本次Q路削峰序列,第二过程是利用本次I路削峰序列和本次Q路削峰序列对保存的本次数据符号进行对削处理。 [0123] Clipping process includes two processes: The first process is to obtain the I sequence and this clipping path clipping sequence Q, using this second process the I sequence and this clipping clipping path Q the sequence of data symbols to be stored cut process.

[0124] 第一过程包括:先获得峰值功率点I路幅度和Q路幅度,即获得峰值功率pow_max。 [0124] The first process comprising: obtaining first amplitude peak power point I and Q channel amplitudes, i.e., peak power is obtained pow_max. 对应的I路数值Imax m和获得峰值功率pow_maX(l对应的Q路数值Qmax m,、后利用 After the I corresponding values ​​obtained peak power and Imax m pow_maX (l corresponding to the Q value Qmax m ,, using

Figure CN101150357BD00131

计算其相位;(S23 ); Calculated phase; (S23);

[0125] 然后,分别生成I路滤波器系数调节因子(公式4-19)和Q路滤波器系数调节因子(公式4-20) (S24); [0125] Then, generate the I-path filter coefficient adjustment factor (Equation 4-19) and Q factor of the filter coefficient adjuster (Equation 4-20) (S24);

[0126] 随后,分别计算本次I路削峰序列(公式4-21)和本次Q路削峰序列(公式4-22)(S25); [0126] Then, calculate the current clipping path sequence I (Equation 4-21) and the current clipping path sequence Q (Equation 4-22) (S25);

[0127] 第二过程包括:利用得到本次I路削峰序列和本次Q路削峰序列完成削峰序列对峰值功率信号的对削处理(S26): [0127] The second process comprises: using the obtained sequence of this clipping the I and Q channel clipping The complete sequence of the sequence clipping peak power signal to the cut processing (S26):

[0128] [0128]

对于I路 For I Road

[0129] [0129]

Figure CN101150357BD00132

[0130] 为了验证这种自适应调节削峰序列方法的有效性,申请人对此方法进行了验证。 [0130] In order to verify the effectiveness of such sequences adaptive clipping method, the applicant of this method is validated. 请参照图10,其为测试自适应削峰序列方法的示意图。 Referring to Figure 10, a schematic diagram of a method for testing the sequence clipping adaptive. 它对所有频点信号在时域上进行线性叠加后,按照以下几种情况进行测试。 After all of its linear frequency signal is superimposed in the time domain, tested according to the following situations. 第一种是信号没有削峰就送到D/A转换器进行D/A变换(就是图中标识的9dB),第二种是削峰的目标功率值为6dB,第三种是削峰的目标功率值为7dB,第四种是削峰的目标功率值为8dB。 The first signal is sent without clipping to D / A converter for D / A conversion (that is identified in FIG. 9dB), the second target power value is clipped 6dB, a third peak clipping target power is 7dB, fourth is clipping target power is 8dB.

[0131] 为了对比测试指标的有效性,对比测试各项指标,没有削峰的数据和不同目标数值的削峰数据进行对比测试。 [0131] In order to compare the effectiveness of the test indicator, the indicators comparison test, there is no clipping of the target data and the data of different clipping values ​​for comparison testing. 请参阅图11,其为不同削峰目标数值对EVM的影响。 See Figure 11, the impact of different target values ​​for the clipping of the EVM. 从图上可知,削峰以后EVM有所恶化,但是还是满足3GPP对EVM的要求,小于12%。 It is seen from the figure, after clipping has deteriorated EVM, but still meet the requirements of 3GPP EVM and less than 12%.

[0132] 根据前文介绍削峰的目标是提高总的发射功率,提高功放的工作效率和改善ACPR,为此针对这几项也进行了测试:固定总功率测试ACPR的改善情况(请参阅图12),固定输出信号的功率查看总消耗功率的改善情况(请参阅图13 )。 [0132] From the foregoing description clipping goal is to increase the total transmit power, improve work efficiency and improve power amplifier ACPR, for this reason these items were also tested: improvement of fixed total power of ACPR test (see Figure 12 ), the output signal power is fixed total power consumption improvement view (see FIG. 13).

[0133] 根据用户需求可以自适用的调整内插滤波器系数,每一次都可以精确的削除峰值功率点,同时削除到峰值点之后,信号的相位损伤最小,减少了解调后相幅损伤,也就使得EVM指标恶化得到改善。 [0133] The interpolation filter coefficients after the user needs can be applied from the adjustment, each time the peak power can be precisely deleted point while slashing to the peak point, the signal phase minimal damage, to reduce the injury phase amplitude demodulation, and it makes EVM indicators have worsened improved. 削峰序列自动调节装置简单易行,易于实现。 Clipping simple sequence automatic adjustment means, easy to implement. 同时测试说明了削峰前后对功放和射频器件的改善情况。 Simultaneously tested before and after clipping the described amplifier and the improvement of the situation of RF devices.

[0134] 一种实现削除峰值功率的通信端,包括:若干内插滤波器:用于将经过调制扩频后的一路数据进行L倍内插滤波;若干变频器:用于对内插后的数据变频至一对应频点数据; [0134] one implementation, the peak power of the deleted communication terminal, comprising: a plurality of interpolation filter: means for interpolation filtering for the L-times all the way through spread spectrum modulated data; a plurality of drive: for the interpolation after data conversion to a corresponding frequency data;

[0135] 一叠加器:连接所有变频单元,用于将变频后所有频点数据在时域上进行线性叠加; [0135] a stacker: connecting all conversion unit for all frequencies after the frequency conversion data is superimposed on a linear time domain;

[0136] 内插削峰器包括: [0136] Clipping interpolator comprising:

[0137] 幅度调节最大值计算子单元:用于计算I路幅度调节的最大数值和Q路幅度调节的最大数值; [0137] maximum amplitude calculation sub-unit adjustment: adjusting the amplitude of the I calculating the maximum value and the Q value for the maximum amplitude adjusted;

[0138] 幅度调节因子计算子单元:用于计算本次I路幅度调节因子和Q路幅度调节因子; [0138] amplitude adjustment factor calculation subunit: this is used to calculate the I and Q amplitude adjustment factor amplitude adjustment factor;

[0139] 本次削峰序列计算子单元:用于计算本次I路削峰序列和Q路削峰序列; [0139] The peak clipping calculation subunit sequence: This is used to calculate the I and Q sequences clipping clipping sequence;

[0140] 加法器:用于将预先保存的本频点数据符号与本次削峰序列进行加减运算。 [0140] The adder: the previously stored for the present frequency of the data symbols and subtracting the clipping of this sequence.

[0141] 本发明还包括削峰判断单元:用于将峰均比与均值功率之和大于或大于等于预设的检测功率的信号才保存以进行削峰处理,所述检测功率小于等于IdB压缩点输入功率值。 [0141] The present invention further includes a clipping judgment unit: the peak to average ratio for the sum of the mean power is greater than or equal to a preset signal before the detected power is larger than the stored peak cut for processing the detected power is less than equal to IdB compression point input power value.

[0142] 上述所描述的内插削峰器可以通过可编程逻辑器件FGPA来实现。 [0142] clipping the interpolation filter as described above may be implemented by a programmable logic device FGPA.

[0143] 以上公开的仅为本发明的几个具体实施例,但本发明并非局限于此,任何本领域的技术人员能思之的变化,都应落在本发明的保护范围内。 Only a few [0143] above disclosed specific embodiments of the present invention, but the present invention is not limited thereto, anyone skilled in the art can think of variations shall fall within the scope of the present invention.

Claims (10)

1. 一种削除峰值功率的方法,其特征在于,包括: (1)经调制扩频后的每一路信号进行内插滤波,变频成不同频点信号; (2)所有频点信号在时域上进行线性叠加; (3)依据幅度变化调节的削峰序列对叠加后需要削峰的信号进行对削,所述需要削峰的信号的峰均比dB数和均值功率dB数之和大于或大于等于预设的检测功率dB数,所述检测功率小于等于IdB压缩点输入功率值。 A method deleted peak power, characterized in that, comprising: (1) by the modulated signal in each channel for spreading interpolation filtering, frequency signals into different frequency; (2) all frequency signals in the time domain the linear superposition; (3) superimposed on the signal is carried out according to need clipping amplitude variations of cut adjustment sequence clipping, the clipped signal peak to average ratio of the number of required number of dB, and dB and the average power is greater than or dB greater than the number of power equal to the preset detection, the detected power is less than equal to the input power value IdB compression point.
2.如权利要求1所述的方法,其特征在于,步骤(3)中依据幅度变化调节削峰序列包括通过以下步骤计算本次I路削峰序列ii1: al:利用公Shimax =Imax m —abs(cos外士ow—max0计算I路幅度调节的最大数值himax,其中,pow_max0 为目标功率,Imaxjl 是pow_maxQ 对应的I 路数值,~ = arg taiK' "1''" ) , 2. The method according to claim 1, wherein the step (3) in accordance with changes in the amplitude adjustment sequence comprises calculating the current clipping path clipping sequence ii1 I by the steps: al: using well Shimax = Imax m - abs (cos outer disabilities ow-max0 calculated amplitude adjusting the I maximum value himax, wherein, pow_max0 target power, Imaxjl is pow_maxQ value corresponding to the I, ~ = arg taiK ' "1' '"),
Figure CN101150357BC00021
m为pow_maxQ对应的Q路数值; a2:利用5caling_i =计算本次削峰的I路幅度调节因子scaling_i,其中h为预先设定的I路削峰序列; a3:利用k = scaling_i 计算本次I路削峰序列i^,其中ii为预先设定的I路削峰序列。 Q-path m has a value corresponding to pow_maxQ; a2: calculated using the I 5caling_i = The amplitude adjustment factor clipping scaling_i, wherein the I h is a predetermined sequence of clipping; a3: k = scaling_i calculated using this I clipping path sequence i ^, wherein the I ii clipping a preset sequence.
3.如权利要求1或2所述的方法,其特征在于,步骤(3)中依据幅度变化调节削峰序列包括通过以下步骤计算本次Q路削峰序列: b1:利用公式hqmm = Qmax -abs(sin0)计算Q路幅度调节的最大数值Kmax,其中,pow_max0 为目标功率,Qmaxjl 是powjnax。 3. The method according to claim 1, wherein the step (3) in accordance with changes in the amplitude adjustment sequence comprising this clipping path clipping sequence Q calculated by the following steps: b1: using the formula hqmm = Qmax - the maximum value Kmax abs (sin0) Q channel amplitude adjustment calculation, wherein, pow_max0 target power, Qmaxjl is powjnax. 对应的Q 路数值j = arg tan,m为pow_maxQ对应的I路数值; b2:利用.scaiing_q = 计算本次削峰的Q路幅度调节因子scaling_q,其中h为预max(/7) _先设定的Q路削峰序列; b3:利用h_fl=scal ing_q *h计算本次Q路削峰序列,其中k为预先设定的Q路削峰序列。 Q path values ​​corresponding to j = arg tan, m corresponding to the I pow_maxQ values; b2: The use .scaiing_q = calculated peak clipping amplitude adjustment factor Q path scaling_q, where h is a pre-max (/ 7) _ presupposition Q clipping path given sequence; b3: using h_fl = scal ing_q * h the Q-path clipping calculation sequence, where k is a predetermined clipping the Q sequence.
4.如权利要求3所述的方法,其特征在于,步骤(3)中对削处理为: 若峰值功率对应的I路数据大于零,则预先保存的本频点数据符号的I路数据与本次I路削峰序列ki对应位相减,否则预先保存的本频点数据符号的I路数据与本次I路削峰序列I对应位相加; 若峰值功率对应到的Q路数据大于零,则预先保存的本频点数据符号的Q路数据与本次Q路削峰序列对应位相减,否则预先保存的本频点数据符号的Q路数据与本次Q路削峰序列ka对应位相加。 4. The method according to claim 3, wherein, in step (3) of the cutting process is: I channel data corresponding to when the peak power is greater than zero, according to the pre-stored frequency data of the I symbol data the clipping the I phase corresponding to Save sequence ki, I channel data or pre-stored according to the frequency of data symbols in this sequence I I clipping path corresponding bit sum; If the peak power corresponds to the Q channel data is greater than zero , the Q channel data stored in advance according to the frequency and the current data symbol sequences correspond to the Q phase clipping Save, or Q channel data according to pre-stored data symbols in frequency and this Q clipping path corresponding bit sequence ka added.
5.如权利要求4所述的方法,其特征在于,预先保存的本频点数据符号为功率超过门限功率的数据符号。 5. The method according to claim 4, wherein the pre-stored frequency data symbols present data symbol power limit for power exceeds the threshold.
6.如权利要求1或4所述的方法,其特征在于,所述检测功率Pin, max为:Pin,max=Pin,ldB_X,其中,Pin,ldB为IdB压缩点输入功率值,X为IdB回退值。 6. The method of claim 1 or claim 4, wherein said detection power Pin, max is: Pin, max = Pin, ldB_X, wherein, Pin, ldB IdB compression point of the input power value, X is IdB backoff value.
7.如权利要求1或4所述的方法,其特征在于,X为IdB回退值,是根据系统要求的邻信道泄露功率比(ACLR)进行设置,系统要求的ACLR越高,X设置越大。 7. The method as claimed in claim 4 or more is provided in claim 1 X, wherein, X is IdB backoff value is set leakage power ratio (ACLR) in accordance with system requirements adjacent channel, the ACLR higher system requirements, Big.
8.如权利要求1所述的方法,其特征在于, 步骤(3)之前还包括:根据对误码率要求设置本次业务对应的逆累计概率分布函数(CXDF)值,获得CXDF值对应的参数峰均比; 步骤(3)中的所述需要削峰的信号还包括为峰均比大于等于所述参数峰均比的信号。 8. The method according to claim 1, characterized in that, prior to the step (3) further comprising: the setting of this inverse cumulative probability distribution function corresponding to the service (CXDF) required bit error rate value, corresponding to a value obtained CXDF PAPR parameters; the (3) in a step required for the clipped signal further comprises greater than or equal to the peak to average ratio PAR signal parameter.
9. 一种实现削除峰值功率的通信端,其特征在于,包括:若干内插滤波器:用于将经过调制扩频后的一路数据进行L倍内插滤波; 若干变频器:用于对内插后的数据变频至一对应频点数据; 一叠加器:连接所有变频器,用于将变频后所有频点数据在时域上进行线性叠加,线性叠加后的信号分I路数据与Q路数据分别进行缓存; 削峰判断单元:用于将峰均比与均值功率之和大于或大于等于预设的检测功率的信号才保存以进行削峰处理,所述检测功率小于等于IdB压缩点输入功率值; 内插削峰器包括: 幅度调节最大值计算子单元:用于计算I路幅度调节的最大数值和Q路幅度调节的最大数值; 幅度调节因子计算子单元:用于计算本次I路幅度调节因子和Q路幅度调节因子; 本次削峰序列计算子单元:用于计算本次I路削峰序列和Q路削峰序列; 加法器:用于将 A communication terminal deleted achieve peak power, characterized by comprising: a plurality of interpolation filter: means for interpolation filtering for the L-times all the way through spread spectrum modulated data; a plurality of drive: for internal interpolated data to a corresponding frequency-conversion data; a stacker: connecting all the drive, for all frequencies after the frequency conversion data is superimposed on a linear time domain signal components I and Q channel data is a linear superposition of the passage data buffers, respectively; clipping judgment unit: the peak to average ratio for the sum of the mean power is greater than or equal to a preset signal before the detected power is larger than the stored peak cut for processing the detected power is less than equal to IdB compression point input power value; clipping interpolator comprising: adjusting the amplitude maximum value calculation subunit: an amplitude adjustment calculation the I and Q the maximum values ​​of the maximum value for adjusting amplitude; amplitude adjustment factor calculating sub-unit: for calculating the current I Road amplitude adjustment factor and Q amplitude adjustment factor; the clipping calculation subunit sequence: this is used to calculate the I and Q sequences clipping clipping sequence; adder: for 先保存的本频点数据符号与本次削峰序列进行加减运算。 Save to the present frequency data symbols subtraction clipping with this sequence.
10.如权利要求9所述的通信端,其特征在于,内插削峰器为可编程逻辑器件(FGPA)。 10. The communication terminal according to claim 9, wherein the interpolation filter is a programmable logic device clipping (FGPA).
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