Spreading code assignment in an ad hoc DS-CDMA wireless network

Author

Wu, Yunnan ; Zhang, Qian ; Zhu, Wenwu ; Kung, S.Y.

Author_Institution

Dept. of Electr. Eng., Princeton Univ., NJ, USA

Volume

5

fYear

2002

fDate

2002

Firstpage

3066

Abstract

In this paper, we examine the problem of optimal spreading code assignment in an ad hoc DS-CDMA wireless network. The problem is formulated in two ways, with the optimization criteria being minimizing the congestion measure, and minimizing the total consumed power, respectively. Either formulation is converted to an optimization of the weighted total squared cross-correlation (WTSC), after some mathematical simplification. We then devise algorithms to reach some local minima of the optimization. Simulation results show significant reduction in the network congestion measure and power consumption, compared with random code allocation.

Keywords

cellular radio; channel allocation; code division multiple access; correlation methods; minimisation; packet radio networks; spread spectrum communication; telecommunication congestion control; DS-CDMA; WTSC; ad hoc wireless network; congestion measure minimization; consumed power minimization; local minima; optimal spreading code assignment; optimization criteria; weighted total squared cross-correlation; Base stations; Bit error rate; Energy consumption; Intelligent networks; Interference; Modulation coding; Multiaccess communication; Power measurement; Semiconductor device measurement; Wireless networks;

fLanguage

English

Publisher

ieee

Conference_Titel

Communications, 2002. ICC 2002. IEEE International Conference on

Print_ISBN

0-7803-7400-2

Type

conf

DOI

10.1109/ICC.2002.997402

Filename

997402