Experimental Results using Frequency Diversity Technique for Mobile Reception of OFDM (2)

Abstract

The coded OFDM (Orthogonal Frequency Division Multiplexing) system minimizes the effect of multipath mobile channels by using the time interleaving. But at lower speed there is possibility that a fade duration is longer than the time interleaving depth, and the time interleaving is not effective enough. Recently we reported the experimental results that the frequency diversity technique improves BER performances even at lower speed. This paper describes the effect of the diversity technique under correlative channels, with the relative gain of received signals and with doppler shift.