Data sequence detection in band-limited channels using two stream detector architecture

摘要

A method for data sequence detection includes generating a first sample stream, equalizing the first sample stream to generate a first equalized sample stream, and buffering the first equalized sample stream. The first sample stream is interpolated to generate a second sample stream. The second sample stream is equalized to generate a second equalized sample stream. In a first processing path, the samples of the buffered first equalized sample stream are filtered using a first noise predictive filter bank to generate a first set of noise sample streams. In a second parallel processing path, the samples of the buffered first equalized sample stream are interpolated using a second interpolation filter to generate an interpolated sample stream and the interpolated sample stream is filtered to generate a second set of noise sample streams. The first equalized sample stream and the second equalized sample stream are processed to generate adapted filter coefficients for the second interpolation filter. The first and second set of noise sample streams are diversity combined to generate a set of combined noise sample streams. A data sequence is detected using the set of combined noise sample streams.

主权项

1. A method for detecting a data sequence, comprising:
generating a first sample stream, wherein the first sample stream is a time-sequenced digital signal associated with samples of an analog signal; equalizing the first sample stream using a first equalization filter to generate a first equalized sample stream; buffering the first equalized sample stream; interpolating the first sample stream using a first interpolation filter to generate a second sample stream, wherein the second sample stream is a phase-shifted version of the first sample stream; equalizing the second sample stream using a second equalization filter to generate a second equalized sample stream; in a first processing path, filtering samples of the buffered first equalized sample stream using a first noise predictive filter bank to generate a first set of noise sample streams; in a second processing path parallel to the first processing path, interpolating said samples of the buffered first equalized sample stream using a second interpolation filter to generate an interpolated sample stream and filtering the interpolated sample stream using a second noise predictive filter bank to generate a second set of noise sample streams; processing the first equalized sample stream and the second equalized sample stream to generate adapted filter coefficients for the second interpolation filter in the second processing path; diversity combining the first and second set of noise sample streams to generate a set of combined noise sample streams; and detecting a data sequence using the set of combined noise sample streams.