Performance Enhancement of MIMO Channel Capacity for Antenna Selection using SVD- Water Filling Technique

Abstract: Nowadays MIMO systems have been widely studied for wireless communication. MIMO technology in combination with OFDM is an attractive solution for providing high data rates with reduced errors and high QOS. It can be thought of as a combination of modulation and multiple access schemes that segment a communication channel in such a way that many users can share it. This requires Antenna arrays at the transmitter and receiver to enhance the system capacity on frequency selective channels resulting in a Multiple Input Multiple Output (MIMO) configuration. As there are several antennas at receiver and transmitter, MIMO systems can be employed for diversity. This spatial multiplexing method transmits several parallel information streams at same transmit power. A number of design trade-offs must be considered when developing an OFDM based system. This paper explores MIMO system model, MIMO receivers, SVD of MIMO channel and system capacity, Beam forming techniques, method of MIMO system design including physical channel measurements, space time coding techniques, frequency synchronization, and finally types of distortions in Shannon capacity technique and possible remedies to avoid those distortions.

Keywords: MIMO, Water Pouring, SVD, AST