Title :
Extended orthogonal polyphase codes for multicarrier CDMA system
Author :
Lu, Liru ; Dubey, V.K.
Author_Institution :
Dept. of Electr. & Electron. Eng., Nanyang Technol. Univ., Singapore, Singapore
Abstract :
The Complete Complementary (CC) codes have been able to improve the performance of multicarrier CDMA system for both downlink and uplink transmission. However, the number of users supported by CC code design is limited as its family size is relatively small. In this letter, an extension to CC codes using Zadoff-Chu sequence is proposed. The proposed codes are able to support large number of users and have perfect auto- and cross-correlation function just like CC codes.
Keywords :
code division multiple access; correlation methods; mobile radio; radio links; sequences; Zadoff-Chu sequence; auto-cross-correlation function; complete complementary codes; downlink-uplink transmission; extended orthogonal polyphase codes; mobile communication system; multicarrier CDMA system; Autocorrelation; Bandwidth; Downlink; Error correction; Error correction codes; Helium; Mobile communication; Multiaccess communication; Wideband;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2004.837655
