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Space–Time/Space–Frequency/Space–Time–Frequency Block Coded MIMO-OFDM System with Equalizers in Quasi Static Mobile Radio Channels Using Higher Tap Order

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Abstract

In 4G broadband wireless communications, multiple transmit and receive antennas are used to form multiple input multiple output (MIMO) channels to increase the capacity (by a factor of the minimum number of transmit and receive antennas) and data rate. In this paper, the combination of MIMO technology and orthogonal frequency division multiplexing (OFDM) systems is analyzed for wideband transmission which mitigates the intersymbol interference and hence enhances system capacity. In MIMO-OFDM systems, the coding is done over space, time, and frequency domains to provide reliable and robust transmission in harsh wireless environment. Also, the performance of space time frequency (STF) coded MIMO-OFDM is analyzed with space time and space frequency coding as special cases. The maximum achievable diversity of STF coded MIMO-OFDM is analyzed and bit error rate performance improvement is verified by simulation results. Simulations are carried out in harsh wireless environment, whose effect is mitigated by using higher tap order channels. The complexity is resolved by employing sphere decoder at the receiver.

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Authors and Affiliations

  1. Department of Electronics and Communication, Jaypee University of Information Technology, Waknaghat, 173215, India

    Bhasker Gupta & Davinder S. Saini

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  1. Bhasker Gupta
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  2. Davinder S. Saini
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Correspondence to Davinder S. Saini.

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Gupta, B., Saini, D.S. Space–Time/Space–Frequency/Space–Time–Frequency Block Coded MIMO-OFDM System with Equalizers in Quasi Static Mobile Radio Channels Using Higher Tap Order. Wireless Pers Commun 69, 1947–1968 (2013). https://doi.org/10.1007/s11277-012-0672-9

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  • DOI: https://doi.org/10.1007/s11277-012-0672-9

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