Multiplex communications – Wide area network – Packet switching
Patent
1989-01-03
1990-11-06
Ng, Jin F.
Multiplex communications
Wide area network
Packet switching
379411, H04B 323
Patent
active
049691449
ABSTRACT:
A passband echo canceller achieves improved performance by providing a signal having a substantially uniform power spectral density to an adaptive echo canceller; the improved input signal is substantially uniform from approximately zero hertz to one half the operating or sample frequency of the echo canceller. This signal may comprise that range of frequencies occupied by the transmitted spectrum with added out of band noise.
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Blackwell Steven R.
Moore Jerry D.
Turner Michael D.
Turner Steven E.
Myers Randall P.
Ng Jin F.
Universal Data Systems, Inc.
Warren Charles L.
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