Patent ID: 6570942
Filing Date: 2003-05-27
Classification: H04B

Abstract:
A method of receiving information signals, each information signal operative in an individual frequency range, and recovering information represented by the information signals comprising:receiving carrier signals modulated by the information signals; reducing the frequency of the carrier signals to a particular intermediate frequency to obtain IF signals; sampling the IF signals to obtain digital information signals; band select filtering the digital information signals to obtain adjacent channel filtered digital data signals; variable interpolating the adjacent channel filtered digital data signals to obtain first signals; complex multiplying the first signals to provide second signals, baseband adaptive equalizing the second signals to select, for each of the second signals, an individual one of a plurality of amplitude levels in quadrature amplitude modulation; feedback operating upon the variable interpolating, in response to the baseband adaptive equalizing, to provide a sampling of the digital information signals for obtaining the first signals in the middle of the period that each of such digital information signals is produced; and feedback operating upon the complex multiplying, in response to the basedband adaptive equalizing, to maintain the frequency of the second signals at the frequency of the digital information signals.