Spreading code selection methods for MC-CDMA under carrier frequency offset

Authors:
Chin-Kuo Jao;Shyue-Win Wei
Affiliations:
Graduate Institute of Communication Engineering, National Chi Nan University, Puli, Taiwan, China;Graduate Institute of Communication Engineering, National Chi Nan University, Puli, Taiwan, China
Venue:
APCC'09 Proceedings of the 15th Asia-Pacific conference on Communications
Year:
2009

Citing 3
Cited 0

MAI-Free MC-CDMA Systems Based on Hadamard–Walsh Codes

IEEE Transactions on Signal Processing
An approximately MAI-free multiaccess OFDM system in carrier frequency offset environment

IEEE Transactions on Signal Processing
Overview of multicarrier CDMA

IEEE Communications Magazine

Quantified Score

Hi-index	0.00

Visualization

Abstract

Carrier frequency offset (CFO) may cause multiple access interference (MAI) among users in multi-carrier code division multiple access (MC-CDMA) system. In the paper the code sensitivity of spreading codes and its correlative to the CFO is observed. An interesting property of orthogonality invariant for spreading codes under CFO has been presented. Based on the properties of code sensitivity, several algorithms of selecting the spread codes that will decrease the MAI caused by frequency offset are proposed. Using the presented code selection methods, the system capacity of MC-CDMA can be effectively increased without increasing the system complexity.