基于Chirp-BOK调制的超宽带无线通信系统研究

基于正向和反向线性调频脉冲良好的自相关性以及匹配滤波后尖锐的时域特性，将线性调频脉冲扩频技术用于高速的超宽带无线通信，设计了Chirp-BOK调制的超宽带通信系统。系统可以采用声表面波器件实现，具有低功耗，低成本，低复杂度等特点。通过仿真分析比较了Chirp-BOK UWB和TH-PPM UWB系统的可靠性，仿真结果说明：在AWGN信道下，Chirp-BOK UWB系统与TH-PPM UWB系统有着相同的可靠性；在IEEE 802．15SG3a建议的CM1、CM3信道模型下，采用Rake接收的Chirp-BOK UWB系统具有良好的抗多径衰落能力，但符号间干扰影响较大。

Study of Ultra-Wideband Wireless Communication System Based on Chirp-BOK Modulation

The chirp spread spectrum technique was applied for high data rates Ultra-Wideband transmission system. Based on the excellent autocorrelation between UP-Chirp and DOWN-Chirp and the knife-edged time domain property after the matched filter, a Chirp-BOK Modulation UWB wireless communication system was presented. The proposed system is low power, low cost and low complexity for the using of Surface Acoustic Wave devices. Through simulation, the BER performances of Chirp-BOK UWB system were obtained and compared with TH-PPM UWB system. The simulation results showed that the proposed Chirp-BOK UWB system has the same BER performance with TH-PPM UWB system when only AWGN channel is considered. It is also highly robust against muhipath fading through rake receiver when used in the CM1 and CM3 channel environments proposed by the IEEE 802.15SG3a, whereas the distortion due to ISI is larger.