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Chirp-BOK-BPSK调制的超宽带无线传输技术

冯金振，郑国莘   

  1. 上海大学 通信与信息工程学院,上海 200072
  • 收稿日期:2007-07-12 修回日期:2007-12-12 出版日期:2008-03-31 发布日期:2008-03-31

Ultra-wideband Wireless Communication Based on Chirp-BOK-BPSK Modulation

FENG Jin-Zhen, ZHENG Guo-Xin   

  1. School of Communication and Information Engineering, Shanghai University, Shanghai 200072, China
  • Received:2007-07-12 Revised:2007-12-12 Online:2008-03-31 Published:2008-03-31

摘要： 分析了正向和反向线性调频脉冲尖锐的自相关特性与极低的互相关特性。基于此特性，在Chirp-BOK调制方法的基础上提出了Chirp-BOK-BPSK调制方式，将输入数据同时调制到Chirp脉冲的调频斜率和正反向相位上。推导了Chirp-BOK-BPSK调制信号的表达式以及在AWGN信道下的系统误码率，且该调制信号在室内信道下存在较大码间干扰。最后通过仿真分析比较了Chirp-BOK-BPSK和Chirp-BOK UWB系统在AWGN信道下最佳接收机性能，信噪比为12dB时系统误码率低于10-4。

关键词: 超宽带, Chirp脉冲, Chirp-BOK-BPSK, 二进制相移键控

Abstract: Based on strong autocorrelation of up-chirp and down-chirp, and extra-low cross-correlation between them, and using Chirp-BOK, we propose the Chirp-BOK-BPSK modulation that can be used in UWB wireless communication system. In this scheme, input data are modulated onto both phases of the Chirp and slope of instantaneous frequency. The BER performance of Chirp-BOK-BPSK UWB scheme is analyzed in an AWGN environment. In the indoor setting, however, the system shows seviere ISI. Simulation has been done to obtain BER performance of the Chirp-BOK-BPSK and compared with the Chirp-BOK UWB. The results show that BER of Chirp-BOK-BPSK is less than 10-4 at a 12dB SNR.

Key words: UWB, chirp, Chirp-BOK-BPSK，BPSK