Performance Improvement of MIMO System Using OSTBC
Roopa M1, B. N. Shobha2
1Roopa M, M.Tech student, Department of Electronics and Communication Engineering, S J C Institute of Technology, Chickballapur, India.
2Dr. B N Shobha, Prof. & Head, Department of Electronics and Communication Engineering, S J C Institute of Technology, Chickballapur, India.
Manuscript received on May 02, 2019. | Revised Manuscript received on May 09, 2019. | Manuscript published on May 15, 2019. | PP: 12-15 | Volume-5, Issue-11, May 2019. | Retrieval Number: K11150551119/19©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: In this modern communication it is very difficult to fulfill the user requirements of increase in data rate within the required band limit and transmitted power, this is the major challenge faced by the modern wireless communication. This problem is caused by the impairments like inter symbol interference (ISI), co-channel interference (CCI) and noise. This problem can be overcome by using the technology called Multiple input multiple output (MIMO). MIMO technology uses the diversity technique so that it achieves the desired reliability of available band limit of frequency spectrum with high data rate by mitigating the interference, multipath effects and signal scattering. In this paper Different space-time block coding (STBC) schemes including Alamouti’s STBC for 2 transmit antennas as well as orthogonal STBC for 2 and 4 transmit antennas are explored to mitigate the CCI and maximum likelihood(ML) equalizer to mitigate ISI. Finally, using these techniques BER performance of the MIMO system using alamouti and OSTBC are implemented in MATLAB and analyzed for using BPSK under Rayleigh fading channel.
Keywords: CCI, ISI, MIMO, ML, STBC.