基于时域定位脉冲抵消的OFDM峰均比抑制技术
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摘要
飞行试验过程中采用无线通讯技术实时将试验机上的测试数据与图像进行下传与实时分析,可以提升试验的安全性和效率。针对试验频段紧张与S波段FM编码传输带宽低的问题,构建了一种适用于飞行试验的OFDM数据传输系统,采用频域预编码成型、时域定位脉冲抵消技术,设计了发送接收端的电路,实现了对峰均比的高效抑制。
During the flight test,the wireless communication technology was used to transmit the test data and images on the test machine in real time,which can improve the safety and efficiency of the test.Aiming at the problem of low frequency of test frequency band and low transmission bandwidth of S-band FM code,an OFDM data transmission system suitable for flight test was constructed. The frequency domain pre-coding and time-domain positioning pulse cancellation technology were used to design the circuit of the transmitting and receiving end. And the high-efficiency suppression of the peak-to-average ratio is realized.
During the flight test,the wireless communication technology was used to transmit the test data and images on the test machine in real time,which can improve the safety and efficiency of the test.Aiming at the problem of low frequency of test frequency band and low transmission bandwidth of S-band FM code,an OFDM data transmission system suitable for flight test was constructed. The frequency domain pre-coding and time-domain positioning pulse cancellation technology were used to design the circuit of the transmitting and receiving end. And the high-efficiency suppression of the peak-to-average ratio is realized.
引文
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[11]高天,李国民.一种降低OFDM系统峰均比的改进算法[J].电子科技,2011(9):24.
[2]杨学志.通信之道:从微积分到5G[M].北京:电子工业出版社,2016.
[3]佟宁伶,罗涛. OFDM移动通信技术原理与应用[M].北京:人民邮电出版社,2009.
[4]周隆龙.基于酉变换和PTS的OFDM系统峰均比优化方法研究[D].武汉:华中科技大学,2016.
[5]吴建霞,杨永立,潘畅.一种降低FBMC-OQAM系统PAPR的低复杂度选择性映射算法[J].电讯技术,2017,57(9):1058-1063.
[6]李丹萍.面向OFDM系统的信道参数估计与峰均比抑制技术[D].西安:西安电子科技大学,2012.
[7]徐林搏.一种降低OFDM信号峰平比的SLM改进算法[J].舰船电子对抗,2017(6):87-90.
[8] CHENG X,LIU D,FENG S. PTS based on Dis ABC algorithm for PAPR reduction in OFDM systems[J]. Electronics Letters,2018,54(6):397-398.
[9]易丹,罗仁泽,戈勇华,等.降低PAPR的PTS算法比较[J].通信技术,2011,44(6):38-39.
[10]欧阳博,林云. OFDM无线通信中高峰均比及其抑制算法研究[J].山西电子技术,2012(1):53-54.
[11]高天,李国民.一种降低OFDM系统峰均比的改进算法[J].电子科技,2011(9):24.