Apparatus and method for equalizing a corrupted signal in a receiver

An equalization system employed in a communication system receiver to equalize a corrupted data signal, the corrupted data signal having been detected from a radio channel signal received by the communication system receiver, the equalization system comprising:

• means for estimating a channel impulse response from the corrupted data signal;
• means, coupled to said means for estimating, for modifying said channel impulse response to produce a modified channel impulse response;
• means, coupled to said means for modifying, for filtering said corrupted data signal;
• and
• means, coupled to said means for filtering and said means for modifying, for estimating the most likely data signal.

A receiver in a communication system which produces a modified channel impulse response of a radio channel signal, the receiver comprising:

• means for receiving the radio channel signal;
• means, coupled to said means for receiving, for estimating a channel impulse response, represented by tap coefficients, from said received radio channel signal;
• means for providing a minimum magnitude threshold;
• and
• means for determining which of said tap coefficients are below said minimum magnitude threshold and means, responsive to said means for determining, for zeroing said tap coefficients which are below said minimum magnitude threshold to produce said modified channel impulse response.

A method of equalization employed in a communication system receiver to equalize a corrupted data signal, the corrupted data signal having been detected from a radio channel signal received by the communication system receiver, the method comprising the steps of:

• estimating a channel impulse response from the corrupted data signal;
• modifying said channel impulse response to produce a modified channel impulse response;
• and
• enhancing the corrupted data signal utilizing said modified channel impulse response.

A method of equalization employed in a communication system receiver to equalize a corrupted data signal, the corrupted data signal having been detected from a radio channel signal received by the communication system receiver, the method comprising the steps of:

• estimating a channel impulse response from the corrupted data signal;
• modifying said channel impulse response to produce a modified channel impulse response;
• filtering said corrupted data signal;
• and
• estimating the most likely data signal based on the modified channel impulse response and the filtered corrupted data signal.

A method of estimating the channel impulse response of a radio channel signal incorporating a synchronization sequence having a predetermined sequence length in a communication system receiver, the method comprising the steps of:

• receiving the radio channel signal;
• estimating a channel impulse response, represented by tap coefficients, from said received radio channel signal;
• providing a minimum magnitude threshold;
• determining which of said tap coefficients are below said minimum magnitude threshold;
• and
• zeroing, responsive to said step of determining, said tap coefficients which are below said minimum magnitude threshold to produce said modified channel impulse response.