METHODS AND APPARATUS FOR JOINT DEMODULATION OF ADJACENT CHANNEL SIGNALS IN DIGITAL COMMUNICATIONS SYSTEMS

摘要

Methods and apparatus for receiving adjacent channel signals wherein adjacent channel interference effects are minimized through joint demodulation of the adjacent channel signals. A channel associated with each signal and each corresponding frequency band is estimated and used to form joint branch metrics for joint sequence estimation. In an exemplary embodiment, a baseband processor receives baseband samples corresponding to at least one carrier frequency, and then jointly demodulates at least two information streams corresponding to different carrier frequencies in dependence upon the received baseband samples. In another embodiment, a joint channel estimator receives at least two baseband sample streams, each stream corresponding to a different frequency band, and jointly estimate medium responses for each of at least two information signals which were transmitted in different frequency bands.