Performance of Linear Multiuser Detection in Gaussian and non-Gaussian Channels
نویسنده
چکیده
Direct-sequence code-division multiple access (DS-CDMA) is a popular wireless technology. In DS-CDMA systems, all of the users' signals overlap in frequency and time and cause multiple access interference (MAI). Multiuser detection schemes are used to detect the users’ data in the presence of MAI. in this paper, a comparison study of linear multiuser detectors in the presence of MAI, under the condition of Gaussian noise channels in DS-CDMA communication systems has been presented, the impact of Near-Far problem and non-Gaussian (uncertain) noise on the performance of linear multiuser detectors also have been investigated. Simulation results show that the linear multiuser detectors have more performance gain over the conventional matched filter and the performance of all investigated detectors suffers severely under the condition of a certain range of impulsive noise channels. Keywords— DS-CDMA, multiuser detection, matched filter, decorrelating, MMSE, nonGaussian noise.
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