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在实际的星地通信环境中，为了更好地适应具有非线性特征的卫星通信信道和提高传统卫星通信信号的频谱利用率，在16PSK和16QAM通信信号的基础上设计了8+8APSK-LFM雷达通信一体化脉冲信号。为了更好地对抗多径延时扩展和频率选择性衰落，引入正交频分复用(OFDM)技术设计了OFDM-8+8APSK-LFM雷达通信一体化脉冲信号。为了彻底解决OFDM系统存在峰均功率比过高的问题和实现雷达通信一体化脉冲信号的恒模传输，引入恒包络(Constant Envelope, CE)技术设计了CE-OFDM-8+8APSK-LFM雷达通信一体化脉冲信号。误码率仿真结果表明，在信噪比为6 dB时，16PSK-LFM雷达通信一体化脉冲信号的误码率大约为8+8APSK-LFM雷达通信一体化脉冲信号的3.3倍。模糊函数仿真结果表明，OFDM-8+8APSK-LFM雷达通信一体化脉冲信号的鲁棒性强于8+8APSK-LFM雷达通信一体化脉冲信号，CE技术可以有效提高信号的距离和速度分辨率性能。设计的3个雷达卫星通信一体化脉冲信号能够较好地满足星地通信和雷达探测的需要。
Abstract：In the actual satellite-ground communication environment, in order to better adapt to the satellite communication channel with nonlinear characteristics and improve the spectral efficiency of traditional satellite communication signals, this paper designs 8+8APSK-LFM radar communication integrated pulse signal based on 16PSK and 16QAM communication signals.In order to better combat multipath delay spread and frequency selective fading, OFDM technology is introduced to design OFDM-8+8APSK-LFM radar communication integrated pulse signal.In order to thoroughly solve the problem of high peak-to-average power ratio in OFDM system and realize constant modulus transmission of radar communication integrated pulse signal, this paper introduces Constant Envelope(CE) technology to design CE-OFDM-8+8APSK-LFM radar communication integrated pulse signal.The simulation results of bit error rate show that the bit error rate of 16PSK-LFM radar communication integrated pulse signal is about 3.3 times that of 8+8APSK-LFM radar communication integrated pulse signal when the signal-to-noise ratio is 6 dB.The fuzzy function simulation results show that the robustness of OFDM-8+8APSK-LFM radar communication integrated pulse signal is stronger than that of 8+8APSK-LFM radar communication integrated pulse signal and CE technology can effectively improve the range and speed resolution performance of the signal.The three radar satellite communication integrated pulse signals designed in this paper can better meet the needs of satellite-ground communication and radar detection.
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基本信息:
DOI：
中图分类号:TN927.2;TN957.51
引用信息:
[1]马启成,卢建斌,叶鑫等.基于恒包络调制的CE-OFDM-8+8APSK-LFM雷达卫星通信一体化波形设计[J].无线电工程,2023,53(12):2927-2935.
基金信息:
国家自然科学基金(61501486)~~