Abstract
In this study, a frequency domain Expectation-Maximization (EM) based channel estimation which estimates the channel coefficients subcarrier by subcarrier is proposed for Space Time Block Coded Orthogonal Frequency Division Multiplexing (STBC-OFDM) systems. As initial channel estimation pilot symbols are used and sequential channel estimation is performed with few pilot symbols in order to use bandwidth efficiently. It is compared to the time domain EM based channel estimation algorithm which needs matrix inversion and seen that the proposed algoritm decreased the complexity without any performance loss. The performance comparison of these algorithms are studied in terms of bit-error rate (BER), minimum-squared error (MSE) and the number of iterations used in the EM algorithm.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
