Patent ID: 8576944
Filing Date: 2013-11-05
Classification: H04L

Abstract:
1. A signal transmitting apparatus for orthogonal frequency division multiplexing (OFDM) system, comprising: a compandor configured to compress and expand a transmitted signal; a predistortor configured to perform a predistortion operation on an output signal of the compandor; a power amplifier configured to amplify an output signal of the predistortor; and a feedback module configured to adjust the compandor and the predistortor based on a feedback signal; wherein the feedback module comprises: a delay unit configured to delay an input signal of the predistortor; an adaptive operation unit configured to adjust parameters of the predistortor based on an output signal of the delay unit and the feedback signal; an inverse compandor configured to perform an inverse operation of the compandor on an output signal of the adaptive operation unit; and a comparator configured to adjust parameters of the compandor and inverse compandor based on a comparison result of the output signal of the compandor and an output signal of the inverse compandor.