Multiplex communications – Duplex – Transmit/receive interaction control
Patent
1995-07-06
1997-05-27
Olms, Douglas W.
Multiplex communications
Duplex
Transmit/receive interaction control
H04B 323
Patent
active
056338635
ABSTRACT:
Echo canceler. A circuit arrangement for the cancellation of echo signals, wherein in the received path, an analog/digital converter is connected with a first adder and a second adder is interposed after the analog/digital converter, with the estimated echo signal being divided into first and second portions, whereby the first portion is transmitted to the first adder and the second portion is transmitted to the second adder for the production of the received signal. In a further embodiment, a third adder is interposed between the analog/digital converter and the second adder, via which the output signal of a compensation filter is added to the signal in the received path.
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"High Bit Rate Digital Subsriber Lines: A Review of HDSL Progress", J.W. Lechleider, I.E.E.E. Journal on Sel. Areas in Com., 9(6); pp. 789-784, Aug. 1991.
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"Linear Echo Cancellation Using Optimized Recursive Prefilterimg", A. Kaelin et al., Proc. I.E.E.E. Int. Symp. on Circuits and Systems, Chicago, pp. 463 to 466, 1993.
"Nonlinear Echo Cancelers Based on Transpose Distributed Arithmetic" M.J. Smith, C.F.N. Cowan, and P.F. Adams, I.E.E.E. Transactions on Circuits and Systems, vol. 35, No. 1, Jan. 1988.
"A Hybrid HDSL Echo Canceler", D. Mueller and A. Kaeln, Proc. I.E.E.E. Int. Symp. on Circuits and Systems, Seattle, WA, Mar. 1995.
Gysel Peter
Kalin August
Muller Daniel
Wenger Bruno
Olms Douglas W.
Patel Ajit
Siemens Schweiz AG
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