Welcome to Santhanakrishnan Balakrishnan’s Webpage |
|
Home |
Research Work: My research interests include wireless communication, OFDM, MIMO, Cooperative Diversity I finished my MS thesis on “Performance of Cooperative Relay System in presence of random residual frequency offset”. Worked as a Graduate Research Assistant, Signal Processing for Wireless Communications Lab, ASU (Aug ‘08 – Present) Advisor: Dr. Cihan Tepedelenlioglu (http://www.eas.asu.edu/~cihan/) · Examined error performance of Cooperative Relay Communication in presence of random residual frequency offset (synchronization error) for Single Carrier Communication – SIMO and MISO protocols · Examined error performance of Cooperative Relay Communication in presence of random residual frequency offset (synchronization error) using OFDM – SIMO and MISO protocols · Derived Cramer Rao Lower Bound (CRLB) for frequency offset - MISO, SIMO protocols of Cooperative Relay Communication · Prepared a technical report on synchronization methods adopted for OFDM Overview: Transmit diversity requires more than one antenna at the transmitter. However, most of the wireless devices are limited by size, cost or hardware complexity to one antenna. Cooperative Diversity comes to the rescue where multiple antennas could not be accommodated at same place. Using Cooperative Diversity, it is possible to achieve the same diversity benefits that are offered in MIMO (Multiple Input Multiple Output) system. Cooperative Diversity system consists of the following: Source, Relay and Destination. They communicate using Protocol I, Protocol II or Protocol III. Each protocol has its own advantage and disadvantage. Among these three protocols, Protocol I achieves the same spectral efficiency and diversity benefits as offered by MIMO system. Protocol II and III have loss in spectral efficiency but can achieve the diversity benefits. Motivation: Due to the inherent nature of
the Cooperative diversity system, synchronization becomes a major issue of
concern. I began working on the error performance of such a system in
presence of residual frequency offset. |
|
|
|
Page maintained by: Santhanakrishnan Balakrishnan