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
Richard J Vilmur, Joseph J Barlo, Ira A Gerson, Brett L Lindsley: Noise suppression system. Motorola, Douglas A Boehm, Charles L Warren, Anthony J Sarli Jr, March 7, 1989: US04811404 (189 worldwide citation)

An improved noise suppression system (800) is disclosed which performs speech quality enhancement upon the speech-plus-noise signal available at the input (205) to generate a clean speech signal at the output (265) by spectral gain modification. The improvements of the present invention include the ...


3
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 ...


4
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 ...


5
Richard J Vilmur: Method and apparatus for fast pilot channel acquisition using a matched filter in a CDMA radiotelephone. Motorola, John G Rauch, Brian M Mancini, September 7, 1999: US05950131 (160 worldwide citation)

Performance of a radiotelephone (104) in a CDMA communication system (100) is enhanced using a receiver searcher (114) that includes a matched filter (128) to capture the pilot energies of all receivable transmissions from a base station (102) and other nearby base stations. A detected PN sequence i ...


6
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 ...


7
Larry C Puhl, Richard J Vilmur: Full duplex speakerphone for radio and landline telephones. Motorola, Rolland R Hackbart, Raymond A Jenski, December 16, 1986: US04629829 (97 worldwide citation)

A full duplex speakerphone employing adaptive filters and having application in radiotelephone systems is disclosed. To cancel acoustic feedback echo of the receive signal, a representation of the receive signal is subtracted from the transmit signal generated by the speakerphone microphone. The ada ...


8
Randall W Rich, Richard J Vilmur: Apparatus and method for optimizing the quality of a received signal in a radio receiver. Motorola, Kevin D Kaschke, May 26, 1998: US05758271 (85 worldwide citation)

A code division multiple access (CDMA) radio receiver (104) having gain receives a radio frequency (RF) signal (122) to produce a received signal (124). The quality (130) of the received signal (124) is determined (111). The quality (130) is preferably a ratio of an energy per chip of a desired sign ...


9
Richard J Vilmur, Robert F D Avello: Automatic output control circuitry for RF power amplifiers with wide dynamic range. Motorola, Raymond A Jenski, Rolland R Hackbart, July 22, 1986: US04602218 (63 worldwide citation)

Automatic power output control circuitry is disclosed in which the magnitude of a radio frequency signal is maintained at one of a plurality of magnitudes selected in response to control signals. The radio frequency signal output from a variable output amplifier is sampled and the sample is further ...


10
Eugene J Bruckert, Richard J Vilmur: Method of handing off and a wireless communication device. Motorola, Donald C Kordich, Lalita P Williams, July 6, 1999: US05920549 (53 worldwide citation)

A wireless communication device (100) can be handed off while operating in the slotted mode of a CDMA system. The wireless communication device comprises a receiver searcher (109) that measures the signal strength of an active pilot prior to the assigned slot and at least one of a plurality of neigh ...