METHOD AND SYSTEM FOR COMPUTING LOG-LIKELIHOOD RATIOS FOR CODED QUADRATURE AMPLITUDE MODULATED SIGNALS

• Main Authors: LUSCHI CARLO, ALLPRESS STEPHEN ALAN, FELIX STEPHEN
• Format: Patent
• Language: English
• Published: 24.08.2007
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; MULTIPLEX COMMUNICATION; TRANSMISSION; TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION

According to an embodiment of the invention, a method and system is disclosed for determining log-likelihood ratios for a coded set of individual bits (40) of a quadrature amplitude modulation (QAM) codeword. In the method at most two constant values (33,35) may be determined to perform a set of pre...