Optimal power reduction on wireless OFDM receiver

Wordlength determination is a crucial task in digital hardware implementations for green computing because the wordlength affects power consumption and system performance. Digital hardware requires careful wordlength design for a sufficient dynamic range. Nevertheless, wordlength can be reduced during better conditions. We present a modeling approach for dynamic variable wordlength (DVW) in digital wireless systems and deploy DVW at an OFDM receiver lowpass filter. The proposed modeling approach estimates power reduction achieved with DVW vs. fixed wordlength for the desired communication quality.