Sensitivity of Carrier Frequency Offset and MAI in DAPSK-MC-CDMA Systems

Authors:
Gen-Horng Chen;Shyue-Win Wei
Affiliations:
Graduate Institute of Communication Engineering, National Chi Nan University, Puli, Taiwan, ROC 545;Graduate Institute of Communication Engineering, National Chi Nan University, Puli, Taiwan, ROC 545
Venue:
Wireless Personal Communications: An International Journal
Year:
2007

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Communication systems engineering

Communication systems engineering
Overview of multicarrier CDMA

IEEE Communications Magazine

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Abstract

A less complex system by integrating non-coherent differential amplitude and phase shift keying modulation with multi-carrier code division multiple access (DAPSK-MC-CDMA) is introduced. The proposed DAPSK-MC-CDMA system can reduce the system complexity and also maintain a good performance and high-spectral efficiency. The paper firstly shows that the performance degradation caused by the multiple access interference (MAI) and the carrier frequency offset can be effectively controlled in a DAPSK-MC-CDMA system. Simulation results illustrate that both the MAI and the carrier frequency offset in the DAPSK-MC-CDMA is much less sensitive than the conventional MC-CDMA system. Furthermore, using the DAPSK modulation, the detection methods of equal gain combining, maximum ratio combining, and minimum mean square error combining now can be used in the multiple-ary DAPSK-MC-CDMA system.