Performance of Space Time Codes in rayleigh fading channel

摘要

In this paper the performance of Space Time Codes (STC) has been analyzed. Use of multiple antennas is an emerging approach for recovering fading and reducing the bit error rate. Space diversity is introduced in space time codes. In Alamouti Space Time Code (STC) two transmit antennas are used that provide relatively better results than no coding approach. Alamouti uses a code matrix at transmitter and at receiver end it uses MLD and estimates the output signals. Space time block codes are with arbitrary number of antennas. It uses a huge code matrix at encoder and decodes using MLD. The performance of STBC is far better than Alamouti and has no match with no coding. The simulation of Alamouti, STBC and no coding is done in project. Space time codes works with the price of redundancy bits and extra antenna price. Future work could be continued in space time turbo trellis codes.