一种椭圆球面波调制信号自适应峰均比抑制方法

发布时间：2018-05-30 23:13

本文选题：椭圆球面波 + 峰均功率比　；参考：《电子与信息学报》2017年01期

【摘要】：该文针对椭圆球面波(Prolate Spheroidal Wave Function,PSWF)时域正交调制信号峰均功率比过高,易受功率放大器非线性影响,造成信号失真,导致系统解调性能下降的问题,提出一种基于μ律压缩的自适应峰均比抑制方法。该方法能够根据输入信号自适应调节压缩参数,有效压缩信号峰值,降低PSWF调制信号峰均功率比(Peak-to-Average Power Ratio,PAPR),同时保证压缩前后信号平均功率不变。理论论证和仿真结果表明,该方法能够有效抑制PSWF调制信号PAPR,当压缩参数m为1且互补累计分布函数CCDF为410-时,压缩后调制信号与原调制信号相比PAPR降低约2.1 d B;有效改善经过功放后调制信号功率谱和系统在高斯白噪声信道下的误码性能。
[Abstract]:In this paper, the problem that the peak to average power ratio of the time domain quadrature modulated signal is too high, which is easy to be influenced by the nonlinear power amplifier, causes the signal distortion and the demodulation performance of the system is degraded, aiming at the problem of the elliptic spherical wave Prolate Spheroidal Wave function / PSWF signal. An adaptive peak-to-average ratio (PAPR) suppression method based on 渭 law compression is proposed. This method can adaptively adjust compression parameters according to the input signal, effectively compress the peak value of the signal, reduce the peak-to-average Power average power ratio (PAPR) of the PSWF modulation signal and ensure that the average power of the signal before and after compression remains the same. The theoretical demonstration and simulation results show that the proposed method can effectively suppress the PSWF modulation signal when the compression parameter m is 1 and the complementary cumulative distribution function (CCDF) is 410-. Compared with the original modulation signal, the PAPR of the compressed modulation signal is reduced by about 2.1 dB, which effectively improves the power spectrum of the modulated signal after the power amplifier and the error code performance of the system in the Gao Si white noise channel.
【作者单位】：海军航空工程学院电子信息工程系;山东省信号与信息处理重点实验室;
【基金】：国家自然科学基金(60772056) 山东省“泰山学者”建设工程专项经费基金(ts20081130)~~
【分类号】：TN911.3

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