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Effect of Rounding and Saturation in Fixed-Point DSP Implementation of IFFT and FFT for OFDM Applications

Overview This paper describes a new technique for designing FFTs for Orthogonal Frequency Division Multiplex (OFDM) transmitters and receivers. Using the new technique, signals within the FFT structure are scaled so that there is an optimum trade-off between saturation and rounding. Conventional FFT designs avoid saturation, either by using fixed scaling factors, which ensure that signal levels are always below the saturation level or by using block floating point.

Further White Paper Details
Publisher	Monash University	File Format	PDF, requires Acrobat Rdr 5
Date Published	July 2004	Downloads	930
Format	White Papers
Topics	Modems

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