基于多码PPM的超宽带天籁调频方案设计与性能分析

Sung-Yoon Jung, Dong-Jo Park, Yeong-Hyeon Kwon, Sang-Min Lee
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引用次数: 4

摘要

在本文中,我们提出了一种基于多码PPM的超宽带跳时多址(TH-MA)方案。多码信号是脉冲位置调制的,它是由期望用户的M个发射位与M个正交码进行扩展而产生的。在接收端,接收到的信号经过两个阶段解调。在第一阶段,通过贝叶斯决策规则对多码PPM信号进行解调。然后,在第二阶段,使用发射机中使用的M个正交扩频码对解调的多码信号进行解扩。分析了该方案的误码率性能和比特传输速率(R/sub / b/)。数值结果表明,随着M的增大,该方案的比特传输率比传统的PPM方案要高得多;在相同比特传输情况下,由于能获得额外的扩频增益,该方案的误码率也比传统的PPM方案好。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Design and performance analysis of UWB TH-MA scheme using multi-code based PPM
In this paper, we propose an UWB time-hopping multiple-access (TH-MA) scheme using multi-code based PPM. The multi-code signal, which is generated by spreading the desired user's M transmitting bits with M orthogonal codes, is pulse-position modulated. At the receiver, the received signal is demodulated through two stages. In the first stage, the multi-code based PPM signal is demodulated through the Bayes decision rule. Then, in the second stage, the demodulated multi-code signal is de-spreaded by using the M orthogonal spreading codes that are used in the transmitter. The BER performance and bit transmission rate (R/sub b/) of the proposed scheme is analyzed. Numerical results show that the proposed scheme has a much higher bit transmission rate than the conventional PPM scheme as M increases and also has better BER performance than the conventional PPM scheme in the same bit transmission case because it can achieve an additional spreading gain.
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