Channel Estimation and Performance Enhancement of Hybrid Technology for next Generation Communication System Nirmalendu

A large demand of frequency allocation has fuelled the Multi-carrier system, resulting in a crowded spectrum as well as simultaneous access being required by a large number of users. Existing wireless systems may utilize single frequency, single antenna and pulse for carrier transmission and reception. Problems of such system is that in case of failure the total system will become non operational. A distributed system in terms of multi-carrier, multi-antenna and coded pulse can provide a more suitable communication this give rise to OFDM-MIMO /hybrid technology as the ultimate solution. This technology is a promising technique for high-data-rate broadband wireless communications and radar because it can reduce interference, multipath effect, jamming and higher target resolution as compared to conventional communication & radar etc. This paper focuses on the MIMO channel estimation under channel known and channel unknown condition along with the performance improvement of hybrid system. The results reveal some interesting effects of spatial correlation, multipath and number of antennas on MIMO channel capacity.The hybrid approach has essentially been developed for 60GHz frequency provided we have the necessary bandwidth. The performance analysis for the MIMO-OFDM system has been carried out based on MATLAB simulation. The experimental results have been verified using the simulation, the results of simulation have been verified with the various works being carried out in this area and the results conferred to be correct.