Method for co-channel interference identification and mitigation

A method for extracting information from a desired signal using a received signal in the presence of at least one co-channel interference signal and intersymbol interference while simultaneously demodulating both the desired signal and the at least one co-channel interference signal, said method comprising:

• capturing said received signal as channel observations;
• determining a channel model and an initial estimate of corresponding model parameters for said channel model using said channel observations during a training portion, said channel model including an estimate of the number of co-channel interference signals present;
• and
• performing a joint sequence detection calculation on said channel observations during a data portion using said channel model and at least one current estimate of said model parameters thereby to produce an estimate of data representing said desired signal during said data portion.

A system for extracting information from a desired signal using a received signal in the presence of at least one co-channel interference signal and intersymbol interference while simultaneously demodulating both the desired signal and the at least one co-channel interference signal, said system comprising:

• a receiver for capturing said received signal as channel observations;
• a channel model and an initial value estimator for estimating a channel model and an initial estimate of corresponding model parameters for said channel model using said channel observations during a training portion, said channel model including an estimate of the number of co-channel interference signals present;
• and
• a joint sequence detector for calculating a joint sequence on said channel observations during a data portion using said channel model and at least one current estimate of said model parameters thereby to produce an estimate of data representing said desired signal during said data portion.