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International Journal of Scientific Engineering and Technology
Year : 2012, Volume : 1, Issue : 2
First page : ( 11) Last page : ( 15)
Online ISSN : 2277-1581.

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.

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Keywords

Space time coding, OFDM, frequency-selective channel.

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