Effect of carrier-frequency offset on the performance of group-orthogonal multicarrier CDMA systems

Authors:
Wei Yang;Jun-Ying Liu;Shi-Xin Cheng
Affiliations:
Beijing Jiaotong University, Xizhimenwai, Haidian District, Beijing, PR China and Southeast University, PR China;Beijing Jiaotong University, Xizhimenwai, Haidian District, Beijing, PR China;Southeast University, PR China
Venue:
Signal Processing - Special section: Multimodal human-computer interfaces
Year:
2006

Citing 2
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Abstract

In this letter, the downlink performance of a group-orthogonal multicarrier code-division multiple-access (GO-MC-CDMA) system with binary-phase shift keying (BPSK) modulation is investigated, when communicating over Rayleigh fading channels in the presence of carrier-frequency offset (CFO). The bit error rate (BER) performance of the GO-MC-CDMA is compared with that of a conventional MC-CDMA for given system resources and for a given value of the CFO. Our study and results show that the GO-MC-CDMA system is capable of achieving a better BER performance than that of a conventional MC-CDMA scheme in the presence of CFO, when the number of users per group is relatively small. By contrast, when the number of users per group is high, two MC-CDMA systems considered achieve similar BER performance.