DocumentCode :
1634249
Title :
On the Performance of Multiple Access Uncoded and Coded DS-BPAM UWB Systems
Author :
Bai, Zhiquan ; Xu, Shaoyi ; Zhang, Weihua ; Kwak, Kysungsup
Author_Institution :
UWB Wireless Commun. Res. Center, Inha Univ., Incheon
fYear :
2006
Firstpage :
1
Lastpage :
5
Abstract :
The performance of two direct sequence ultra wideband (DS-UWB) communication systems is investigated. The first system is the classic DS-UWB system. The second is obtained by adding a forward error control codes (FEC), convolutional code. For the two systems, binary pulse amplitude modulation is applied. The performance of these two systems is analyzed in detail under AWGN channel. In our proposed coded scheme, we use soft output Viterbi algorithm (SOVA). The analysis shows that the coded DS-UWB system outperforms the DS-UWB system significantly, or more importantly, at a given bit error rate, the coding scheme increases the number of users by a factor which is logarithmic in the number of pulses used in DS UWB systems. Simulation results on the bit error rate of the proposed system indicates that the system is capable to work in lower SNR´s and therefore supports higher data transmission rates compared to the previously proposed UWB communication systems.
Keywords :
AWGN channels; Viterbi decoding; convolutional codes; error correction codes; error statistics; forward error correction; pulse amplitude modulation; spread spectrum communication; ultra wideband communication; AWGN channel; DS-BPAM UWB systems; binary pulse amplitude modulation; bit error rate; convolutional code; data transmission rates; direct sequence ultra wideband communication systems; forward error control codes; multiple access coded systems; multiple access uncoded systems; soft output Viterbi algorithm; AWGN channels; Amplitude modulation; Bit error rate; Convolutional codes; Error correction; Forward error correction; Performance analysis; Pulse modulation; Ultra wideband technology; Viterbi algorithm;
fLanguage :
English
Publisher :
ieee
Conference_Titel :
Vehicular Technology Conference, 2006. VTC-2006 Fall. 2006 IEEE 64th
Conference_Location :
Montreal, Que.
Print_ISBN :
1-4244-0062-7
Electronic_ISBN :
1-4244-0063-5
Type :
conf
DOI :
10.1109/VTCF.2006.289
Filename :
4109554
Link To Document :
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