Performance Analysis of DS-BPAM UWB System over Fading Channels—Uncoded and Coded Schemes

• Published in: Embedded and Ubiquitous Computing pp. 224 - 233
• Main Authors: Bai, Zhiquan, Xu, Shaoyi, Zhang, Weihua, Kwak, Kyungsup
• Format: Book Chapter Conference Proceeding
• Language: English
• Published: Berlin, Heidelberg Springer Berlin Heidelberg 2006; Springer
• Series: Lecture Notes in Computer Science
• Subjects: Applied sciences; Computer science; control theory; systems; Computer systems and distributed systems. User interface; Convolutional codes; Direct sequence (DS); Exact sciences and technology; Multipath fading channel; Soft Output Viterbi algorithm (SOVA); Software; SRake receiver; Systems, networks and services of telecommunications; Telecommunications; Telecommunications and information theory; Transmission and modulation (techniques and equipments); Ultra wideband (UWB); Fading channels; Performance evaluation; Pervasive computing; Convolutional code; Finger; Transmission channel; Multipath propagation; Amplitude modulation; Pulse system; Distributed system; Ultra wide band; Boarded computer; Algorithm analysis; Control code
• ISBN: 9783540366799; 3540366792
• ISSN: 0302-9743; 1611-3349
• DOI: 10.1007/11802167_24

This paper investigates the performance of two direct sequence ultra wideband (DS-UWB) communication systems over multipath fading channels. The first system is the classic DS-UWB system and the second is obtained by adding a forward error control code (FEC), convolutional code. For the two systems, bipolar pulse amplitude modulation (BPAM) is applied. In the receiver end, the selective diversity combining receiver-SRake receiver is used as a feasible receiver. In the proposed coded scheme, we use soft output Viterbi algorithm (SOVA). The analysis shows that the coded DS-UWB system outperforms the conventional DS-UWB system significantly with the increase of the SRake fingers. The effective order of processing gains achieved by the coded scheme is the product of the number of SRake branches and the free distance of the code applied.