Method for initialization of per tone frequency domain equalizer (FEQ) through noise reduction for multi-tone based modems

A method for initializing and adapting a communications receiver for increased data throughput, comprising the steps of:

• receiving frames of data;
• estimating values of taps of a frequency domain equalizer (FEQ) with an averaging technique that removes noise and improves performance;
• minimizing lengths of the taps using the data;
• calculating values of the taps with the estimated values through an N Log N matrix inversion solution using the data;
• and
• generating an average of the frames of data;
• wherein estimating values of the taps with an averaging technique further comprises estimating values of taps by using an equation comprising:
• y
• i
• =
• 1
• N
• p
• ⁢
• ∑
• j
• =
• 1
• N
• p
• ⁢
• y
• i
• j
• where y is demodulated output, and N is a symbol size expressed in samples.

A communications receiver comprising:

• a T-tap time domain equalizer (TEQ) for shortening lengths of a channel input response of a received signal;
• a frequency domain equalizer (FEQ) comprising N 1-tap filters for correcting a phase rotation and an amplitude attenuation of the received signal;
• a processing unit;
• a memory storage device;
• and
• a program stored in the memory storage device for providing instructions to the processing unit;
• the processing unit responsive to the instructions of the program, operable for
• estimating values of taps of a frequency domain equalizer (FEQ) with an averaging technique that removes noise, wherein estimating values of taps comprises using an equation comprising:
• y
• i
• =
• 1
• N
• p
• ⁢
• ∑
• j
• =
• 1
• N
• p
• ⁢
• y
• i
• j
• where y is demodulated output, and N is a symbol size expressed in samples;
• minimizing lengths of the tap filters for the frequency domain equalizer (FEQ);
• and
• calculating values of the taps with the estimated values and an N Log N matrix inversion solution.