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Space Frequency Coded OFDM Mr. Shrivastava Rohit M. Tech. Digital Communication, Barkatullah University Institute of Technology, Bhopal, India. Email: rohit_theshiningstar@yahoo.com Online published on 4 November, 2017. Abstract We are going to implement and study a space frequency coded OFDM system which consists of two transmitters and a single receiver. Simple Alamouti spacetime code is used. An M-ary PSK modulation is used to modulate the symbols across an OFDM channel. We will also propose a variation of the scheme which tries to spread additional symbols across time-frequency attempting to increase the rate of transmission without changing the type of modulation employed or increasing bandwidth. A Rayleigh frequency selective slow fading channel is assumed throughout the analysis. SER performance of the above systems is carried-out with emphasis on the modulation scheme, no. of carriers and bit SNR. Top Keywords Space time coding, OFDM, frequency-selective channel. Top | |
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