SIGNAL PROCESSING APPARATUS EMPLOYING THE SPECTRAL PROPERTY OF THE SIGNAL

摘要

A method and apparatus for separating and removing distortion from interferingco-channel singals and suppressing adjacent-channel interfering signals of theGaussian Minimum-Shift Keyed (GMSK) or other MSK type with filteringstructures that exploit the cyclostationarity of the received GMSK or otherMSK signals in order to accommodate a greater number (or the same number, butwith greater quality) of transmitted signals received by one or more antennasthan can be accommodated by existing filters. The parameters in thesefiltering structures are adapted by either of two adaptation apparatus thatexploit both the known training sequence that is transmitted in most wirelesscommunications systems, and the constant modulus property exhibited by each ofthe transmitted GMSK or other MSK signals.