Title:
【発明の名称】伝送方式
Document Type and Number:
Japanese Patent JPH02501969
Kind Code:
A
Abstract:
PCT No. PCT/GB88/00019 Sec. 371 Date Sep. 1, 1989 Sec. 102(e) Date Sep. 1, 1989 PCT Filed Jan. 13, 1988 PCT Pub. No. WO88/05621 PCT Pub. Date Jul. 28, 1988.A method of transmission between a first and a second station via a transmission link in at least part of which transmissions in two directions travel over a common path, transmissions by the second station occupying a bandwidth which is the same as or at least partially overlaps the bandwidth occupied by transmissions by the first station, in which the first station includes an echo canceller and which simultaneous transmission by the stations occur only during periods which immediately follow a period of transmission by the first station alone and are of short duration relative to the rate of change of the echo characteristics of the path. The bandwidth overlap may be intentional or may be the result of imperfect filtering in a frequency division duplex system.
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| WO/1983/000266 | DATA SIGNAL ECHO CANCELLER |
Inventors:
Brown Li John David
Application Number:
JP50104088A
Publication Date:
June 28, 1990
Filing Date:
January 13, 1988
Export Citation:
Assignee:
British Telecommunications Public Limited Company
International Classes:
H04B3/23; H04B14/00; H04L1/18; H04L5/14; H04L1/16; (IPC1-7): H04B3/23; H04B14/00; H04L1/16; H04L5/14
Domestic Patent References:
| JPS4821162U | 1973-03-10 | |||
| JPS5797249A | 1982-06-16 |
Attorney, Agent or Firm:
Naotaka Ide