Research Article
Performance of Hybrid Carrier DS CDMA Communication System
@INPROCEEDINGS{10.1109/ChinaCom.2011.6158143, author={Xin Qiu and Xuejun Sha and Lin Mei}, title={Performance of Hybrid Carrier DS CDMA Communication System}, proceedings={6th International ICST Conference on Communications and Networking in China}, publisher={IEEE}, proceedings_a={CHINACOM}, year={2012}, month={3}, keywords={4-weighted fractional fourier transform code division multiple access carrier scheme selective channel}, doi={10.1109/ChinaCom.2011.6158143} }- Xin Qiu
Xuejun Sha
Lin Mei
Year: 2012
Performance of Hybrid Carrier DS CDMA Communication System
CHINACOM
IEEE
DOI: 10.1109/ChinaCom.2011.6158143
Abstract
This paper proposes a hybrid carrier DS CDMA communication system, combining 4-weighted fractional Fourier transform (4-WFRFT) with code division multiple access (CDMA). The signals are modulated in an order fractional domain and transformed by 4-WFRFT. In the time domain CDMA technique is adopted for multiple accesses and time diversity gain. The bit energy in 4-WFRFT system is distributed on the time-frequency plane more evenly and symmetrically, compared to orthogonal frequency division multiplexing (OFDM) system, in which Fourier transform is used. When there is a deep fading notch or single-frequency interference in the channel, the proposed method can split the interference to a broader range in order to reduce the influence, resulting in the better system performance.
