Radio Resource Assignment in Multiple-Chip-Rate DS/CDMA Systems Supporting Multimedia Services
Young‐Woo Kim, Seung Joon Lee, Min Young Chung, Jeong Ho Kim, Dan Keun Sung · 1999
This paper is concerned with radio resource allocation in multiple-chip-rate (MCR) DS/CDMA systems accommodating multimedia services with di#erent information rates and quality requirements. Considering both power spectral density (PSD) over a radio frequency (RF) band and the e#ect of RF input filtering on the receiver in MCR-DS/CDMA systems, criteria for capacity estimation are presented and the characteristics of co-channel interference between subsystems are investigated. System performance in MCR-DS/CDMA systems is strongly a#ected by radio resource assignment. A minimum power-increment-based resource assignment scheme for an e#- cient resource assignment scheme is proposed herein. The performance of this scheme is compared with that of a random-based resource assignment scheme in terms of blocking probability and normalized throughput. The minimum power-increment-based resource assignment scheme yields a better performance than the random-based resource assignment scheme for multimedia services.