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Information Technology Journal

Year: 2011 | Volume: 10 | Issue: 2 | Page No.: 416-421
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Authors

Meng Fanyu

Gu Xuemai

Keywords

Research Article

A Combined Chirp Signal Modulation Technique for Multiple Access System

Meng Fanyu and Gu Xuemai
These recent years, as the wireless communication has gained increasing attention, various kinds of wireless communication techniques have developed rapidly to get a better system performance. Chirp signal is also noticed again for the feature of low power consumption, high processing gain and low cost. However, traditional chirp signal modulation technique is not suit for multiple access, which is an important parameter to estimate a modern wireless communication system. Even in a WPAN system, the expected number of users at the same time is at least four. In this study, a form of combined chirp signal is designed to solve the multiple access problem. The cross coherence of the signal from different users is analyzed in this study. At the same time, this study also discusses the system performance in AWGN channel and 802.15.4a indoor channel, respectively. Analysis and simulation show this new combined chirp signal technique has a better BER performance as well as the multiple access capacity.
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