Method and system for adjusting the bandwidth of a frequency domain smoothing filter for channel tracking loop in an OFDM communication system

An OFDM communication system having an adjustable bandwidth frequency domain smoothing filter for channel tracking loop, comprising:

• a smoothing filter;
• an equalizer;
• one or more processors;
• and
• a memory storage device containing instructions which when executed, cause the one or more processors to perform the steps of:
• providing to the smoothing filter a plurality of channel response estimates, each channel response estimate corresponding to a symbol and a subcarrier;
• receiving, from the smoothing filter, a plurality of filtered channel response estimates, each filtered channel response estimate corresponding to a value of the channel response estimate;
• calculating a plurality of error vectors, each having a plurality of error values, each error value being a difference between the channel response estimate and the filtered channel response estimate;
• obtaining a mean error vector having a plurality of mean error values, each mean error value corresponding to a subcarrier for all symbols;
• calculating a power of each subcarrier based on the plurality of mean error values of the mean error vector;
• comparing the power of each subcarrier to a threshold power;
• and
• adjusting the bandwidth of the smoothing filter based on the comparison.