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This paper describes low power architecture by using a dynamic wordlength technique in wireless orthogonal frequency division multiplexing (OFDM) system. The number of wordlength in digital signal processing (DSP) has to be carefully determined because wordlength affects system performance and hardware cost. Dynamic wordlength technique is applied to a fast Fourier transform (FFT) processor and a...
This paper presents a new design method for reducing power dissipation of Viterbi decoder using variable wordlength architectures in wireless bit-interleaved coded modulation and orthogonal frequency division multiplexing (BICMOFDM) systems. The proposed method observes wireless communication quality and adjusts a wordlength in order to keep a desirable PER. Two types of the Viterbi decoder are used...
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