并行组合扩频超宽带发射参数对接收性能的影响

摘要

给出并行组合扩频超宽带系统结构模型,研究其发射机参数中并行组合扩频数据调制参数对接收机误比特率的影响,以实现发射机参数的优化选取.最后指出发射机参数的选取原则.研究结果表明:在相同信噪比条件下,当正交扩频序列总数固定时,每次选取发射的正交扩频序列数对系统的误比特率影响较为显著,并随着其增加而误比特率迅速增大,因此,一般取小数值整数为宜;而当每次选取发射的正交扩频序列数固定时,正交扩频序列总数对系统的误比特率影响相对比较平稳,但系统的复杂度随之增加而线性增加.%In order to optimize the transmitter parameters of the new ultra-wideband (UWB) system, the structure model of system is given, and the influence of receiver performance caused by the transmitter parameters was mainly investigated. Finally, the selection principle of transmitter parameters was indicated. The results show that under the same condition of bit error rate, when the set number of pseudo-noise sequences is fixed, the number of selected pseudo-noise sequences has a remarkable effect on system performance, which decreases quickly while the number of selected pseudo-noise sequences increases. The impact of the set number of pseudo-noise sequences is relatively stable when the number of selected pseudo-noise sequences is fixed. However, the system complexity rises when the set number of pseudo-noise sequences increases.