Performance analysis of hybrid carrier DS CDMA communication system
QIU Xin, SHA Xue-jun, MEI Lin
Communication Research Center, Harbin Institute of Technology, Harbin 150001, China
Abstract:
A hybrid carrier (HC) DS CDMA communication system is proposed, combining 4-weighted fractional Fourier transform (4-WFRFT) with code division multiple access (CDMA) technique. The signals are modulated in a certain order fractional Fourier domain and transformed by 4-WFRFT to compose the hybrid carrier signals. In the time domain CDMA technique is adopted for multiple accesses and time diversity gain. Compared to orthogonal frequency division multiplexing (OFDM) system, in which Fourier transform is adopted, the signal energy in HC system is distributed on the time-frequency plane more evenly and symmetrically. Thus, 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. Moreover, the performances of the proposed system, such as peak-to-average power rate (PAPR) and security are also discussed in the paper.
Key words: 4-weighted fractional Fourier transform code division multiple access carrier scheme selective channel
DOI：10.11916/j.issn.1005-9113.2012.04.013
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Performance analysis of hybrid carrier DS CDMA communication system
本站小编 哈尔滨工业大学/2019-10-23
相关话题/Performance analysis hybrid carrier DS
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