Proposed sets of polyphase spreading sequences for DS-CDMA system
Jalal Jamal Hamad-Ameen · 2006
Abstract:- In direct sequence code division multiple access (DS/CDMA) systems, a large number of users share the same frequency band at the same time, and each user is assigned a unique signature sequence which spreads information bits through multiplication. In this paper, some of ployphase signature sequences for direct sequence code division multiple access (DS/CDMA) system is proposed. The proposed sequences have good aperiodic correlation properties. The new sets of polyphase spreading sequences are the multiplication of the polyphase chirp sequences by some other binary sequences for example: Barker & Willard binary sequences.The obtained new sets of polyphase sequences tested by using of Matlab program have good correlation properties and performance in DS/CDMA systems.