Design And Performance Analysis Of Uwb Th-Ma Scheme Using Multi-Code Based Ppm
2003 IEEE CONFERENCE ON ULTRA WIDEBAND SYSTEMS AND TECHNOLOGIES, CONFERENCE PROCEEDINGS(2003)
摘要
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-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.
更多查看译文
关键词
decision rule,radio receivers,pulse position modulation,time hopping,broadband networks,radio transmitters
AI 理解论文
溯源树
样例
生成溯源树,研究论文发展脉络