1
David E Borth, Ira A Gerson, Philip J Smanski, Richard J Vilmur: Automatic gain selector for a noise suppression system. Motorola, Douglas A Boehm, Donald B Southard, Charles L Warren, December 16, 1986: US04630305 (216 worldwide citation)

An automatic gain selector is disclosed for use with a noise suppression system which performs speech quality enhancement upon a noisy speech signal available at the input to generate a noise-suppressed speech signal at the output by spectral gain modification. The channel gain controller (240) of t ...


2
David E Borth, Ira A Gerson, Richard J Vilmur: Automatic background noise estimator for a noise suppression system. Motorola, Douglas A Boehm, Donald B Southard, Charles L Warren, December 16, 1986: US04630304 (181 worldwide citation)

An improved background noise estimator (320) is disclosed for use with a noise suppression system (300) for generating an estimate of the background noise power spectral density provided to noise suppressor (310), which performs speech quality enhancement upon the pre-processed speech-plus-noise sig ...


3
David E Borth, Ira A Gerson, Richard J Vilmur: Noise suppression system. Motorola, Douglas A Boehm, Donald B Southard, Charles L Warren, December 9, 1986: US04628529 (166 worldwide citation)

An improved noise suppression system (400) is disclosed which performs speech quality enhancement upon speech-plus-noise signal available at the input (205) to generate a clean speech signal at the output (265) by spectral gain modification. The noise suppression system of the present invention incl ...


4
David E Borth: TDMA communications system with adaptive equalization. Motorola, Douglas A Boehm, Steven G Parmelee, Anthony J Sarli Jr, July 25, 1989: US04852090 (143 worldwide citation)

A method and means for reducing multipath interference distortion in a time-division multiple access (TDMA) communications system is disclosed. A transmitting station (100) formats one or more equalizer synchronization words with a first user's data word, time-multiplexes this formatted user message ...


5
David E Borth, Ira A Gerson, Richard J Vilmur: Hands-free control system for a radiotelephone. Motorola, Douglas A Boehm, Anthony J Sarli Jr, Charles L Warren, April 12, 1988: US04737976 (132 worldwide citation)

An improved hands-free user-interactive control and dialing system is disclosed for use with a speech communications device. The control system (400) includes a dynamic noise suppressor (410), a speech recognizer (420) for implementing voice-control, a device controller (430) responsive to the speec ...


6
Fuyun Ling, David E Borth, Colin D Frank, Phillip D Rasky, James F Kepler: Method and apparatus for demodulation and power control bit detection in a spread spectrum communication system. Motorola, John G Rauch, April 7, 1998: US05737327 (90 worldwide citation)

A receiver circuit (400, 500) receives a spread spectrum communication signal, such as a DS-CDMA signal, including a pilot channel and including a power control designator. The signal is despread and decoded. The pilot symbols on the pilot channel are provided to a channel estimator (408) for estima ...


7
David E Borth, Chih Fei Wang, Duane C Rabe, Gerald P Labedz: Phase-coherent TDMA quadrature receiver for multipath fading channels. Motorola, Raymond A Jenski, Rolland R Hackbart, May 9, 1989: US04829543 (77 worldwide citation)

A method and apparatus for phase-coherently demodulating a multipath-impaired time division multiple access QPSK data timeslot is disclosed. A quadrature separator generates multipath-impaired intermediate signals which, during a predetermined synchronizing sequence for the timeslot, are applied to ...


8
David E Borth, John R Haug, Phillip D Rasky: Method and apparatus for frequency hopping a signalling channel in a communication system. Motorola, Richard A Sonnentag, January 10, 1995: US05381443 (74 worldwide citation)

A cellular communication system hops both signalling channels and traffics channels in a common hopping sequence. To obtain system information from the frequency hopping signalling channel, a subscriber unit waits on a predetermined frequency, or carrier, until the frequency hopped signalling channe ...


9
David E Borth, Phillip D Rasky, Fuyun Ling, M Vedat Eyuboglu: Signal weighting system for digital receiver. Motorola, Robert H Kelly, August 25, 1992: US05142551 (61 worldwide citation)

A signal weighting system for associating a confidence level with portions of a communication signal transmitted upon a multipath channel and received by a receiver. A signal received by the receiver is equalized by an equalizer circuit, such as a maximum likelihood sequence estimator, and the equal ...


10
David E Borth, John R Haug, Phillip D Rasky: Method of registering/-reassigning a call in a dual mode communication network. Motorola, Anthony G Sitko, Jeffrey G Toler, November 12, 1996: US05574973 (60 worldwide citation)

Registration operates by sensing (106) the availability of a first communication system. A quality factor of a channel of the system is measured (111). A channel of the first system is selected if the quality factor of the channel exceeds a threshold (113). If selected, the subscriber attempts to re ...