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Complexity Reduced MIMO Interleaved SC-FDMA Receiver with Iterative Detection

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DOI: 10.4236/ijcns.2014.712051    3,372 Downloads   3,858 Views  

ABSTRACT

In this paper, we propose the receiver structure for Multiple Input Multiple Output (MIMO) Interleaved Single Carrier-Frequency Division Multiple Access (SC-FDMA) where the Frequency Domain Equalization (FDE) is firstly done for obtaining the tentative decision results and secondly using them the Inter-Symbol Interference (ISI) is cancelled by ISI canceller and then the Maximum Likelihood Detection (MLD) is used for separating the spatially multiplexed signals. Furthermore the output from MLD is fed back to ISI canceller repeatedly. In order to reduce the complexity, we replace the MLD by QR Decomposition with M-Algorithm (QRD-M) or Sphere Decoding (SD). Moreover, we add the soft output function to SD using Repeated Tree Search (RTS) algorithm to generate soft replica for ISI cancellation. We also refer to the Single Tree Search (STS) algorithm to further reduce the complexity of RTS. By examining the BER characteristics and the complexity reduction through computer simulations, we have verified the effectiveness of proposed receiver structure.

Conflicts of Interest

The authors declare no conflicts of interest.

Cite this paper

Tsukamoto, M. and Iwanami, Y. (2014) Complexity Reduced MIMO Interleaved SC-FDMA Receiver with Iterative Detection. International Journal of Communications, Network and System Sciences, 7, 508-518. doi: 10.4236/ijcns.2014.712051.

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