CODING GAIN ANALYSIS OF ORTHOGONAL POLYNOMIAL BASED SPACE-TIME BLOCK CODE

In recent years, wireless communication is increasingly used in voice and messaging due to the mobility it offers. There is a growing demand for high data rate wireless communication because of the possibility of using this for internet and multimedia applications in the near future. To achieve high data rate communication, the system has to overcome problems such as multipath fading and cochannel interference. The channel statistic is significantly often Rayleigh which makes it difficult for the receiver to reliably determine the transmitted signal unless some less attenuated replica of the signal is provided to the receiver. This technique is called diversity, which can be provided using temporal, frequency, polarization and spatial resources. However, in many situations, the wireless channel is neither significantly time variant nor highly frequency selective. This forces the communication engineers to consider the possibility of deploying multiple antennas at both the transmitter and receiver to achieve spatial diversity and also provide high performance. The space-Time Block code is a technique that can provide diversity and coding gain. In this paper we propose coding gain analysis of the orthogonal polynomials based on Space-Time Block Code.