OFDM雷达通信一体化信号设计与峰均比降低技术研究

发布时间：2018-01-05 18:00

本文关键词：OFDM雷达通信一体化信号设计与峰均比降低技术研究　出处：《南京理工大学》2017年硕士论文　论文类型：学位论文

【摘要】：随着信息技术的飞速发展,目标威胁与电磁环境日渐复杂。为减小作战平台的体积和电磁干扰等问题,实现电子设备的一体化是一种有效的方式。同时,技术的进步使得雷达通信一体化系统成为可能。实现雷达通信的一体化可以节约频谱资源,缩小平台体积,并通过共用设备降低成本,提高设备利用率。本文主要研究基于OFDM的雷达通信一体化信号设计与峰均比降低技术。首先分析雷达通信一体化实现的可行性,选择具有更高的频谱利用率的信号共享技术展开深入研究;分别阐述了基于OFDM信号和基于MCPC信号的雷达通信一体化方案,对这两种方案进行仿真与比较后,发现MCPC共享信号可获得更好的雷达模糊函数与通信误码率;然后针对该信号的高峰均比特性,研究了适用于MCPC共享信号的峰均比降低技术,分析了几种传统雷达或通信系统中常用削峰技术应用于一体化系统的效果,提出了一种适用于雷达通信一体化信号的新型峰均比降低技术,引入闲置载波思想,调整一体化信号结构,并选择合适的闲置载波编码方式,仿真结果表明,该技术不仅能把信号的PMEPR降到2以下,而且能同时保证雷达模糊函数和通信误码率性能,适用于一体化信号的峰均抑制;最后,提出了一种新型的基于匹配照射的MCPC一体化信号波形自适应优化设计方法,在求解算法中兼顾通信BER性能,在降低发射信号PMEPR的同时,显著优化MCPC 一体化系统接收SNR,仿真结果表明,该方法优化设计后的一体化发射信号SNR提高了约8dB,PMEPR降低到3.6,可有效改善雷达通信一体化系统整体性能。
[Abstract]:With the rapid development of information technology, the target threat and electromagnetic environment are becoming more and more complex. In order to reduce the size of combat platform and electromagnetic interference, it is an effective way to realize the integration of electronic equipment. The integration of radar communication can save spectrum resources, reduce the volume of platform, and reduce the cost through common equipment. This paper mainly studies the design of radar communication integrated signal based on OFDM and the PAPR reduction technology. Firstly, the feasibility of radar communication integration is analyzed. Select the signal sharing technology with higher spectrum efficiency to carry out in-depth research; The integration scheme of radar communication based on OFDM signal and MCPC signal is expounded, and the simulation and comparison between the two schemes are carried out. It is found that MCPC shared signal can obtain better radar ambiguity function and communication bit error rate (BER). Then, according to the peak-to-average ratio (PAPR) characteristic of the signal, the PAPR reduction technology suitable for MCPC shared signal is studied. This paper analyzes the effect of several conventional peak-cutting techniques used in radar or communication systems, and puts forward a new peak-to-average ratio (PAPR) reduction technique which is suitable for radar communication integrated signals, and introduces the idea of idle carrier. The integrated signal structure is adjusted and the suitable idle carrier coding method is selected. The simulation results show that this technique can not only reduce the PMEPR of the signal to less than 2. Moreover, it can guarantee the performance of radar ambiguity function and communication bit error rate at the same time, which is suitable for the peak average suppression of integrated signals. Finally, a new adaptive optimal design method of MCPC integrated signal waveform based on matching irradiation is proposed, which takes into account the communication BER performance in the solution algorithm. At the same time, the PMEPR of the integrated MCPC system is significantly optimized. The simulation results show that the SNR of the integrated signal is increased by about 8dB after the optimized design. The PMEPR is reduced to 3.6, which can effectively improve the overall performance of radar communication integration system.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN95;TN929.53

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