Title:
簡便に適応可能なハイブリッド回路
Document Type and Number:
Japanese Patent JP2005514857
Kind Code:
A
Abstract:
A method and apparatus for removing an echo in a receiver of a full-duplex communication by adjusting the relative gain between the hybrid path and the received signal path, where the transfer function of the load coupling circuit is emulated and then the transmitted signal is subtracted from the combined signal and in another method and apparatus, by employing a digital block for making the hybrid gain setting decision by evaluating the hybrid performance where the total received power, which is the sum of the true received power and the power of the residual echo is measured; such an evaluation results in evaluating each possible hybrid gain setting and deciding on the setting that yields the lowest residual echo power. traditional hybrid circuit may be made adaptive to line conditions by varying its relative gain to the input signal.
Inventors:
Oyan, Fen
Application Number:
JP2003559041A
Publication Date:
May 19, 2005
Filing Date:
December 26, 2002
Export Citation:
Assignee:
Globespan Virata,Inc.
International Classes:
H04B3/20; H04B3/23; H04B3/03; (IPC1-7): H04B3/03; H04B3/20
Attorney, Agent or Firm:
Masahisa Takahashi
Hisamaru Hanada
Hisamaru Hanada