A pilot-signal assisted channel estimation scheme for multi-carrier modulation

We propose a pilot-signal assisted channel estimation (PSCE) scheme for a multi-carrier modulation (MCM) system where the pilot signal bandwidth is restricted in the subcarrier. In this scheme, at the receiver, the pilot signals of each subcarrier are added up to be inphase at the midpoint of pilot-symbol duration, then the pilot signal exhibits a sharp peak amplitude. Thus the channel impulse response can be estimated with a high time-resolution. A simple channel equalization, is done using the estimated channel characteristic and BER performance is improved by applying the PSCE scheme to an MCM system under the Rayleigh two-path fading condition