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Performance analysis of overloaded CDMA system under imperfect synchronization using Parallel/Successive Interference Cancellation

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Abstract

A hybrid Interference cancellation (HIC) technique employing both Parallel and Successive Interference Cancellation (PIC/SIC) is proposed for Overloaded Direct Sequence Code Division Multiple Access (OCDMA) system under imperfect synchronization. Two types of receivers are proposed to efficiently mitigate the multiuser interference (MUI). In type I receiver, the MUI within group-1 users are first cancelled using Parallel Interference Cancellation (PIC). Then the multistage Successive Interference Cancellation (m-SIC) is performed on the resultant output of PIC to efficiently cancel the interference of group-2 users on group-1 users. The type II receiver is designed by performing PIC immediately followed by SIC and this combined process is repeated till a major chunk of multi user interference is cancelled. The BER performance of type II receiver is proved to be better than other cancellation techniques such as PIC, SIC and the proposed type I receiver.

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Authors and Affiliations

  1. Department of Electronics and Communication Engineering, Park College of Engineering and Technology, Coimbatore, 641659, India

    S. Sasipriya

  2. Sri Ramakrishna Engineering College, Coimbatore, 641022, India

    C. S. Ravichandran

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  1. S. Sasipriya
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  2. C. S. Ravichandran
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Correspondence to S. Sasipriya.

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Sasipriya, S., Ravichandran, C.S. Performance analysis of overloaded CDMA system under imperfect synchronization using Parallel/Successive Interference Cancellation. Telecommun Syst 56, 509–518 (2014). https://doi.org/10.1007/s11235-013-9762-6

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