Certain investigations on the performance of idma accessing scheme for cooperative networks

Abstract

Next generation wireless networks should provide means to efficiently use the fundamental time-varying channel to accommodate the demand for voice, video and data and provide very high data rates in excess of hundreds of megabits per second. Spectral efficiency, effective processing techniques, and extending the frequency bandwidth are all ways to make future demand for increased capacity and improved efficiency in wireless networks conceivable. Multiple antennas, multicarrier approaches, and cooperative communication strategies are viewed as critical enablers in the pursuit of a superior wireless communication system. A significant change has occurred over the last decade, in that cooperative communication and multi-user diversity has been found to offer massive capacity benefits. This shows that wireless networks of the future will have to accommodate these needs. Future studies show that when efficient utilization of geographical and user domains is implemented, communication systems can meet or exceed the fundamental capacity limit with data rates approaching that limit. newlineCode Division Multiple Access (CDMA) is widely used multiple access scheme for broad band wireless communications. It has many desirable features such as asynchronous transmission, robustness against fading, supporting many users, but the performance of the CDMA system is limited by Multi Access Interference (MAI) and Inter-Symbol-Interference (ISI). Recently, the concept of chip-interleaved CDMA named as Interleave Division Multiple Access (IDMA) is demonstrated that it can mitigate the effects of MAI and ISI newline