An Overview of Various Techniques to Improve Receive Diversity in MIMO OFDM

An Overview of Various Techniques to Improve Receive Diversity in MIMO OFDM

  IJETT-book-cover  International Journal of Engineering Trends and Technology (IJETT)          
  
© 2014 by IJETT Journal
Volume-10 Number-6
Year of Publication : 2014
Authors : Naveen Kumar , Arvinder Pal Singh Kalsi
  10.14445/22315381/IJETT-V10P259

Citation 

Naveen Kumar , Arvinder Pal Singh Kalsi. "An Overview of Various Techniques to Improve Receive Diversity in MIMO OFDM", International Journal of Engineering Trends and Technology (IJETT), V10(6),304-310 April 2014. ISSN:2231-5381. www.ijettjournal.org. published by seventh sense research group

Abstract

MIMO-OFDM system has been currently recognized as one of the most competitive technology for 4G mobile wireless systems. Techniques such as use of multiple antennas can be utilized in order to obtain a multiplexing gain, a diversity gain, or an antenna gain, thus enhancing the throughput (in terms of capacity) or bit rate, the error performance, or the signal-to-noise ratio of wireless systems, respectively. In this paper various receive combing techniques such as MRC, EGC and SC for enhancement of diversity have been discussed. Receive combining techniques with LDPC codes enhance the performance of overall system by providing coding gain. Overview of Alamouti’s STBC along with maximum likelihood (ML) decoding algorithms also discussed.

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Keywords
Multiple-input multiple-output (MIMO), orthogonal frequency division multiplexing (OFDM), low density parity check (LDPC) codes, space time block code (STBC), maximal ration combining (MRC), selection combining (SC), equal gain combining (EGC).