Cellular Architecture and Downlink Performance Evaluation of a Dual-Polarized Multimode CDMA Based Local Multipoint Distribution System

Fu-Tung WANG  Mu-King TSAY  

IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences   Vol.E86-A   No.2   pp.487-496
Publication Date: 2003/02/01
Online ISSN: 
Print ISSN: 0916-8508
Type of Manuscript: PAPER
Category: Spread Spectrum Technologies and Applications
dual-polarization,  multimode CDMA,  LMDS,  inter-cell interference,  

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A dual-polarized multimode CDMA based local multipoint distribution system (LMDS) is presented. The twisted sector concept and narrowed sector cell are proposed to improve the system performance. Inter-cell interference is analyzed and discussed for the downstream direction based on hexagonal cell architecture. The bit error rate (BER) performance of a multimode CDMA scheme is investigated in terms of the worst case for high order modulation. The simulation results show that the proposed cell structure obtains better power efficiency and makes the multimode CDMA scheme feasible in LMDS deployment.