METHOD, DEVICE, DSP AND MODEM FOR EFFICIENT ECHO CANCELER PHASE ROLL TRACKING

摘要

The present invention provides a novel method, device, digital signal processor and modem for efficiently determining and tracking a phase roll of a far end echo by utilizing a novel phase error generator (131) and a novel, efficient replica generator (133). The efficient replica generator (133) utilizes a uniquely positioned phase rotator (125) to facilitate replication of the far end echo. A unique combination of a Hilbert phase splitter (104) and a conjugate Hilbert phase splitter (134) together with a rectangular to polar converter (135) enable the novel phase error generator (131) to provide a reliable phase error.