Adaptive set partitioning for reduced state equalization and joint demodulation

A receiver comprising:

• a receive antenna and receive filter for receiving and filtering a radio signal;
• a channel response estimator for estimating channel responses using training symbols in the received radio signal;
• a pre-filter and noise-whitening filter estimator for estimating net channel responses using the estimated channel responses and the received radio signal;
• a pre-filter and noise-whitening filter for filtering the received radio signal using the estimated net channel responses;
• a set partition selector for selecting a best set partition from a group of given partitions by using the estimated net channel responses and the filtered radio signal;
• and
• a reduced-state demodulator for jointly demodulating data symbols in the filtered radio signal using a reduced-state joint trellis determined by the selected best set partition.

A method for mitigating interference at a receiver in a wireless communication system, said method comprising the steps of:

• receiving and filtering a radio signal;
• estimating channel responses using training symbols in the received radio signal;
• estimating net channel responses using the estimated channel responses and the received radio signal;
• filtering the received radio signal using the estimated net channel responses;
• selecting a best set partition from a group of given partitions by using the estimated net channel responses and the filtered radio signal;
• and
• jointly demodulating data symbols in the filtered radio signal using a reduced-state joint trellis determined by the selected best set partition.

A wireless communication system comprising:

• a receiving unit;
• a transmitting unit;
• and
• said receiving unit for mitigating interference in a radio signal received from said transmitting unit by using a reduced-state sequence estimation (RSSE) technique that selects a best set partition which is used to partition a joint signal set that is a function of symbols and channel coefficients associated with the radio signal.