Combined Beamforming with Orthogonal Space Time Block Code for MIMO-OFDM with Simple Feedback

In this paper, we introduce a proposed scheme to enhance the performance of orthogonal space time block code (OSTBC) with four time slots and two antennas by combing OSTBC with random beamforming to can use it in the downlink transmission for a mobile system.  Multiple-input multiple-output orthogonal frequency-division multiplexing (MIMO-OFDM) system has been recognized as one of the most promising techniques to achieve a good service and increase data rate in the next generation (4&5G) broadband wireless communications. So, we apply Space time block code (STBC) for MIMO-OFDM system with linear decoding.  Also, we perform STBC with beamforming for MIMO-OFDM system to improve the performance of a system. Simulation results show that the beamforming improves bit error rate (BER) performance of OSTBC and STBC-OFDM for different types of modulation and diversity.

[1]  Vahid Tabataba Vakili,et al.  A Novel Space Time Block Code Scheme for Three Time Slots and Two Transmit Antennas , 2013, IEEE Communications Letters.

[2]  Mahrokh G. Shayesteh,et al.  An Efficient Space Time Block Code for LTE-A System , 2014, IEEE Signal Processing Letters.

[3]  Thomas L. Marzetta,et al.  Capacity of a Mobile Multiple-Antenna Communication Link in Rayleigh Flat Fading , 1999, IEEE Trans. Inf. Theory.

[4]  Ashutosh Sharma,et al.  Performance analysis of STBC coded MIMO-OFDM system for WIMAX (IEEE 802.16) systems , 2015, 2015 International Conference on Innovations in Information, Embedded and Communication Systems (ICIIECS).

[5]  Xiang-Gen Xia,et al.  Space-Time/Frequency Coding for MIMO-OFDM in Next Generation Broadband Wireless Systems , 2007, IEEE Wireless Communications.

[6]  Mikael Skoglund,et al.  Combining beamforming and orthogonal space-time block coding , 2002, IEEE Trans. Inf. Theory.

[7]  Thomas L. Marzetta,et al.  Multiple-antennas and isotropically random unitary inputs: The received signal density in closed form , 2002, IEEE Trans. Inf. Theory.

[8]  Hamid Jafarkhani,et al.  Combining beamforming and quasi-orthogonal space-time block coding using channel mean feedback , 2003, GLOBECOM '03. IEEE Global Telecommunications Conference (IEEE Cat. No.03CH37489).

[9]  Siavash M. Alamouti,et al.  A simple transmit diversity technique for wireless communications , 1998, IEEE J. Sel. Areas Commun..

[10]  Chau Yuen,et al.  3-Time-Slot Group-Decodable STBC with Full Rate and Full Diversity , 2012, IEEE Communications Letters.

[11]  Chau Yuen,et al.  Quasi-Orthogonal Space-Time Block Codes for Two Transmit Antennas and Three Time Slots , 2011, IEEE Transactions on Wireless Communications.

[12]  M. Mary Rosalinetamil Selvi.  Combined Beamforming with Space Time Frequency Coding for Mimo-OFDM Systems , 2017 .