A far-end echo canceller with a digital filter for simulating a far end echo containing a frequency offset

摘要: A far-end echo path may be simulated at a terminal which utilizes QAM by processing the in-phase and quadrature data symbols pulse shaping filter whose transfer function raised cosine function. The are then multiplied cos (ω c +ω o )t sin )t, respectively, where ω is carrier frequency adaptively determined offset of signal. output signals multipliers summed result processed single transversal adaptively. this