Multiple Access <Emphasis Type="Italic">M</Emphasis>-ary Modulation UWB System Based on Code-Selected Direct Sequence Bipolar PAM |
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| Authors: | Zhiquan Bai Dongfeng Yuan Kyungsup Kwak |
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| Affiliation: | (1) School of Information Science and Engineering, Shandong University, Jinan, Shandong, 250100, People’s Republic of China;(2) UWB Wireless Communications Research Center (INHA UWB-ITRC), INHA University, Incheon, 402-751, Korea |
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| Abstract: | This work presents an M-ary multiple access code-selected direct sequence (DS) ultra wideband (UWB) communication system. A high data rate multiple
access UWB system can be obtained by a code selection mechanism. In the proposed system, each user is assigned a DS code set
with M/2 DS code sequence and a particular DS code sequence can be selected by the log2 (M/2) bits from the DS code set. More importantly for this M-ary UWB communication system, with the increase of the modulation level M, it allows to reduce the required transmitter power maintaining the number of users, the data transmission rate and the multiple
access performance. In this paper, we also introduce the detailed algorithm to compute the bit error rate (BER) over the AWGN
channel and correlation receivers.
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| Keywords: | Multiple access Direct sequence spread spectrum (DSSS) Ultra wideband (UWB) Bipolar pulse amplitude modulation (BPAM) |
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