1
Cioffi John M, Bingham John A C: Method and apparatus for echo cancellation of a multicarrier signal.. Telebit, August 12, 1992: EP0498369-A2 (48 worldwide citation)

When the transmitter and receiver of a duplex multicarrier modem are connected to a two-wire line, echoes of the transmitted signal are reflected back into the receiver by mismatches between the output impedance of the modem and the input impedance of the line. These echoes are cancelled by an echo ...


2
Bingham John A C: Method and apparatus for correcting for clock and carrier frequency offset, and phase jitter in multicarrier modems.. Telebit, October 23, 1991: EP0453203-A2 (28 worldwide citation)

A method of correcting for the impairments of phase jitter and frequency offset imposed by a transmission medium and of a clock frequency difference between a transmitting and a receiving multicarrier modem is disclosed. The method comprises two modes: a training mode that uses pilot tones, and a da ...


3
Sands Nicholas P, Bingham John A C: Synchronisation of multicarrier transceivers over time-division duplex channels. Amati Communications, May 19, 1999: EP0917315-A2 (9 worldwide citation)

Improved techniques for synchronizing transmissions and receptions of a data transmission system utilizing time division duplexing is disclosed. The improved synchronization techniques utilize the time-varying nature of the energy of the received data to obtain synchronization. In one embodiment, an ...


4
Bingham John A C: Mitigating radio frequency interference in multi-carrier transmission system. Amati Communications, August 9, 2007: JP2007-202176 (8 worldwide citation)

PROBLEM TO BE SOLVED: To reduce the influence of radio frequency interference (radio interference) in a multi-carrier data transmission system.SOLUTION: In the multi-carrier transmission system where interference easily occurs within a restricted band, a subcarrier is not used in the band. Furthermo ...


5
Bingham John A C: Switched-capacitor agc system.. Racal Data Communications, November 28, 1984: EP0126337-A2 (5 worldwide citation)

An automatic gain control (AGC) system provides a serial digital output. An analog-to-digital converter implemented by SC technology receives an analog input voltage signal (Vin) and converts it to a digital word through an iterative algorithmic process involving successive approximation against an ...


6
Bingham John A C: Switched-capacitor modulator.. Racal Vadic, March 30, 1983: EP0075161-A1 (4 worldwide citation)

The moduiator (12) provides a means for simultaneous modulation of two carrier signals (CXR1, CXR2) in quadrature by two input signals (22, 24) in such a way that the gains of the two modulations are exactly the same. A switched-capacitor modulator (12) is provided having a plurality of input signal ...


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8
Bingham John A C: Method and apparatus for reducing the turn-around time in facsimile transmission.. Telebit, August 14, 1991: EP0441055-A2 (1 worldwide citation)

Previously recommended methods of transmitting facsimile data on the telephone network resulted in periods of time when there is no signal present in the network; one consequence of this was that the retraining time required for the facsimile modem's receiver after each quiet period was undesirably ...


9
Bingham John A C: Switch capacitor modulator. Racal Vadic, January 19, 1983: GB2101846-A (1 worldwide citation)

A switched-capacitor modulator for modulating a carrier signal with a modulating signal comprises: switching means 10 including a first input 16 for application of the modulating signal, a second input for application of a plurality of switching signals, an output terminal for providing a sampled mo ...


10
Sands Nicholas P, Bingham John A C: Methode et systeme de synchronisation demetteurs-recepteurs a duplexage par repartition dans le temps, Method and system for synchronizing time-division-duplexed transceivers. Amati Communications Corporation, Amati Communications Corporation, KIRBY EADES GALE BAKER, December 6, 2005: CA2254807 (1 worldwide citation)

Improved techniques for synchronizing transmissions and receptions of a data transmission system utilizing time division duplexing is disclosed. The improved synchronization techniques utilize the time-varying nature of the energy of the received data to obtain synchronization. In one embodiment, an ...