METHODS AND APPARATUS FOR INTERFERENCE CANCELLATION USING COMPLEX INTERFERENCE ORTHOGONALIZATION TECHNIQUES

摘要

A communications signal including components associated with desired and interfering signals that are modulated according to respective first and second modulation sequences is processed to generate a baseband signal. The baseband signal is correlated with the first modulation sequence, .e.g., a combination of a first scrambling sequence and a first spreading sequence, to produce a first correlation output. The baseband signal is also correlated with a combination of the first modulation sequence and a complex component (e.g.), a second scrambling sequence) of the second modulation sequence, to generate a second correlation output. The first and second correlation outputs are combined to generate an estimate of information represented by the first signal, for example, by combining the first and second correlation outputs to produce a first RAKE finger output and combining the first RAKE finger output with a second RAKE finger output to generate an estimate of information represented by the desired signal. Related receiver apparatus is also discussed.