A REVIEW ON: IMPROVEMENT IN BER PERFORMANCE BY MMSE EQUALIZER WITH MIMO OFDM

Kirti Lakra, M Tech, Mr Bhavneesh, Malik, Deptt Riem, Rohtak, Deptt Gaurav Kochar, Rohtak Riem
2015 International Journal of Engineering Technology   unpublished
During the research equalizer is always a matter of strategies. When a signal is transmitted over a radio channel, it is subject to reflection, refraction and diffraction and also the type of modulation technique selected at transmitter. The communication environment changes quickly and thus introduce more complexity and uncertainty to channel response. Ofdm is one of the best multiplexing techniques which compensate intersymbol-interference as well as co-channel-interference. In wireless
more » ... . In wireless Communication, scare resources and hence imposes a high cost on the high data rate transmission. Fortunately, the emergence of multiple antenna system has opened another very resourceful dimension space, for information transmission in the air. It has been demonstrated that multiple antenna system provides very promising gain in capacity without increasing the use of gain, throughput, spectrum, reliability, and less sensivity to fading, hence leading to a breakthrough in the data rate of wireless communication system. Since than multiple inputs multiple output (MIMO) system has become one of the major focuses in the research community of wireless communication and information theory. In order to observe the effect of multipath fading channel on the transmitted signal, a whole digital communication system simulator is developed. Ofdm along with MIMO strategies are very good to increase the capacity of the system and minimize to intersymbol-interference. MMSE equalizer under the multipath fading and MIMO strategy has improved Bit Error Rate Performance in this paper.
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