Apparatus and method for echo cancellation

Details Apparatus and method for echo cancellation Apparatus and method for echo cancellation

H - Electricity

04

B

340/72

H04B 3/23 (2006.01)

Patent

CA 1329832

ABSTRACT OF THE DISCLOSURE In order to deal with echoes having exceptionally long tails, such as are generated by 2B1Q signals in ISDN systems, an echo canceller comprises a first echo cancelling means, conveniently a transversal filter, operative over a first number of baud periods, and filter means, conveniently an infinite impulse response filter, operative over a later number of baud periods. The filter means responds to each symbol of the transmitted signal to generate a pulse response which decays exponentially according to a predetermined function. The echo canceller further comprises means for subtracting the outputs of the first echo cancelling means and the filter means, respectively, from the received signal. The filter means may have more than one tap, enabling the exponential decay function to be adjusted to give a closer approximation to the shape of the echo tail. 21

580829

Affiliated with

Also associated with

Rating

Apparatus and method for echo cancellation does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Apparatus and method for echo cancellation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for echo cancellation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFCA-PAI-O-1292032