Delay spread estimation of multipath fading channels in a OFDM receiver

摘要

Method for Measuring the Dispersion of a Multipath Channel for an OFDM Receiver.;Orthogonal Frequency Division Multiplexing (OFDM) system using reference symbols to support channel tracking for enabling the receiver (104) to estimate the channel dispersion (Δ) of a mobile radio channel (103) being severely impaired by attenuation fades (frequency-selective fading) and a time-variant behavior.;In the proposed solution of the underlying invention a delayed version of the received data signal y(k) is correlated with an estimated version ŝ(k) of the demodulated and re-modulated transmitted data signal y(k) in order to estimate the channel impulse response ĥ(τv,k), wherein τv,k denotes the delay for the ν-th channel estimation sample, and to calculate the delay spread Δ̂k of the mobile radio channel (130).