Method and system for Doppler spread and delay spread matching with channel estimation by circular convolution in OFDM communication networks

A system for suppressing noise in an estimate of a channel, the system comprising:

• a receiver configured to receive an orthogonal frequency division multiplexing (OFDM) signal comprising a plurality of reference signal (RS) tones and a plurality of data symbols;
• an inverse Fourier transform unit configured to inverse Fourier transform an input vector comprising said plurality of RS tones extracted from said received OFDM signal to form a time domain representation of said channel estimate;
• a measurement unit configured to measure at least one of inter-carrier interference and Doppler spread associated with said channel to determine time filter parameters;
• and
• a time filter unit configured to time filter said time domain representation of said channel estimate based on said time filter parameters to suppress noise.

A system for suppressing noise in an estimate of a channel, the system comprising:

• an inverse Fourier transform unit configured to inverse Fourier transform an input vector comprising a plurality of RS tones extracted from an orthogonal frequency division multiplexing (OFDM) signal to form a time domain representation of said channel estimate;
• a measurement unit configured to measure at least one of inter-carrier interference and Doppler spread associated with said channel to determine time filter parameters;
• and
• a time filter unit configured to time filter said time domain representation of said channel estimate based on said time filter parameters to suppress noise.