Blind start-up of a dual mode cap-qam receiver

Details Blind start-up of a dual mode cap-qam receiver Blind start-up of a dual mode cap-qam receiver

H - Electricity

04

L

H04L 27/32 (2006.01) H04L 25/03 (2006.01) H04L 25/49 (2006.01) H04L 27/38 (2006.01)

Patent

CA 2272246

A receiver has a dual mode of operation - a carrierless amplitude modulation/phase modulation (CAP) mode and a quadrature amplitude modulation (QAM) mode - yet only requires a single equalizer structure for both the CAP mode of operation and the QAM mode of operation during blind start-up. The receiver uses the same blind equalization updating algorithm independent of the type of received signal for converging the equalizer structure. The blind equalization updating algorithm incorporates a constant R, whose value is a function of the type of received signal, e.g., a QAM signal or a CAP signal. The type of received signal is determined as a function of the in-phase component of the mean-squared error, E[e2 n].

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