Performance of a turbo-coded downlink IDMA system using transmitter pre-processing. (July 2016)

• Record Type: Journal Article
• Authors: Rajmohan, R.; Vishvaksenan, K.S.; Mira, M.; Subramanian, Sudharssun
• Is Part Of: Computers & electrical engineering. Volume 53(2016)
• Page Start: 385
• Page End: 393
• Publication Date: 2016-07
• Subjects: Interleave division multiple access (IDMA) -- Multi-user interference (MUI) -- Multi- stream interference (MSI) -- Multi-user transmitter pre-processing (MUTP) -- Stanford university interim (SUI) channel model -- Singular value decomposition (SVD); Computer engineering -- Periodicals; Electrical engineering -- Periodicals; Electrical engineering -- Data processing -- Periodicals; Ordinateurs -- Conception et construction -- Périodiques; Électrotechnique -- Périodiques; Électrotechnique -- Informatique -- Périodiques; Computer engineering; Electrical engineering; Electrical engineering -- Data processing; Periodicals; Electronic journals; 621.302854
• DOI: 10.1016/j.compeleceng.2015.11.029
• Languages: English
• ISSNs: 0045-7906

Abstract

Highlights: We investigate the BER performance of turbo coded IDMA system using transmitter pre-processing for DL transmission. Performance is analyzed using ZF-MUTP when communicating over SUI and LTE channel models specifications. BER Performance is compared for ZF-MUTP assisted IDMA system considering both an equal power approach and a maximum-signal-to-noise ratio (MSNR) approach. Coded IDMA system with MUTP based on MSNR power allocation regime results in a superior BER performance with less SNR when compared to the equal power allocation policy. Abstract: In this study, we investigate the bit error rate (BER) performance of a multi-user transmitter pre-processing (MUTP) aided, turbo-coded interleave division multiple access (IDMA) scheme over correlated frequency-selective channels for downlink (DL) communication. We realize MUTP using a zero forcing (ZF) approach. Further, we build the pre-processing matrix using the channel state information of all of the active users. To be specific, we evaluate the BER performance of a coded ZF-MUTP assisted IDMA system for a realistic channel model based on Stanford University Interim channel and Long term Evolution channel specifications; the MUTP is based on both an equal power approach and a maximum-signal-to-noise ratio (MSNR) approach. From our simulation results, we observe that our considered system with a MSNR power allocation regime provides better performance in terms of the achievable BER than the equal power approach, while offering a low complexity receiver for DL transmission. Graphical abstract: