Co-channel interference canceler and driving method therefor

A co-channel interference canceler for generating a driving signal to select between a first input signal which is not filtered by a co-channel interference rejection filter and a second input signal which is filtered by the co-channel interference rejection filter, said co-channel interference canceler comprising:

• a comparison circuit for comparing error rates of first and second input signals, with respect to a reference signal, for a first predetermined period to generate a comparison signal;
• a holding detection circuit for determining whether said comparison signal is maintained for a second predetermined period;
• and
• a signal correction circuit for selecting a value maintained in said holding detection circuit for said second predetermined period, and for holding a previous value when the value is not maintained in said holding detection circuit for said second predetermined period.

A method for driving a co-channel interference canceler having a co-channel interference rejection filter, the method comprising the steps of:

• (a) filtering a first input signal using the co-channel interference rejection filter to generate a second input signal;
• (b) calculating error rates of said first and second input signals with respect to a reference signal, and generating a driving signal based on the calculated error rates;
• and
• (c) selecting one of said first and second input signals according to the driving signal, wherein the step (b) comprises the steps of:
• (b1) calculating a symbol error rate (SER) between said first input signal and a previously stored reference signal, for a first predetermined period, to generate a first SER value;
• (b2) calculating an SER between said second input signal and said reference signal, for the first predetermined period, to generate a second SER value;
• and
• (b3) comparing said first SER value with said second SER value to generate said driving signal based on the smaller value of said first and second SER values.