RECEIVER AND METHOD FOR IMPLEMENTING ADAPTIVE OLA FUNCTION IN MULTI-BAND OFDM SCHEME

摘要

A receiver and a method for implementing an adaptive OLA(OverLap and Add) function in a multi-band OFDM(Orthogonal Frequency Division Multiplexing) scheme are provided to determine an OLA length according to the delay spread and SNR(Signal to Noise Ratio) of a measured receiving signal. A receiver of a multi-band OFDM scheme includes a channel estimator(110), an SNR estimator(140), and an OLA unit(130). The channel estimator(110) estimates a delay spread from a digital input signal. The SNR estimator(140) estimates an SNR from the digital input signal. The OLA unit(130) determines an OLA length based on the estimated delay spread and the SNR, and performs OLA according to the determined OLA length. The OLA unit(130) adds the rear samples of an OFDM symbol corresponding to the digital input signal to the front samples of the OFDM symbol, wherein the rear samples of the OFDM symbol correspond to the estimated delay spread.