Motorola Corporation

R Mark Harrison

Kamyar Rohani

John Douglas Reed

Amitava Ghosh

Walter J Rozanski, Jr

Mark Ian Van Horn

Kaymar Rohani

A method () is provided for transmitting a traffic signal with an adaptive antenna array of a base transceiver such that a subscriber unit utilizes a non-dedicated pilot transmitted from a reference antenna element for demodulation of the traffic signal. The method () comprises determining a channel impulse response from a plurality of antenna elements in operative communication with the base transceiver to a receive antenna of the subscriber unit (). In addition, the method () comprises computing an array weight vector that is at least a function of a reference channel impulse response of one of said plurality of antenna elements configured as a reference antenna element and the channel impulse response of one of the plurality of antenna elements that is an element of the adaptive antenna array (), configuring the adaptive antenna array with the adaptive array weight vector () and transmitting the traffic signal with the adaptive antenna array configured with the adaptive array weight vector ().

Method and apparatus for transmitting a traffic signal using an adaptive antenna array

Each of a plurality of transmitters (31-37) transmits (62) one of a plurality of known signals. The known signals being known to a receiver (40). The receiver (40) then measures the known signals (63); and using those measurements, estimates the plurality of channel responses (64). The channel responses are then used to determine a power ratio parameter (65) and a phase correction parameter (66).

Method for determining a plurality of channel responses and modifying a

A portable communication device (10) is controlled by voice recognition circuitry (20) remote from the portable communication device. The portable communication device includes apparatus for producing and transmitting a parametric representation of voice commands. The remote circuitry (which could possibly be a base station, a mobile repeater, or simply a dedicated box, separate from the portable) produces control signals, responsive to the parametric representation of voice commands, for controlling the portable communication device.

Remote voice control system

A method is offered of automatically beamforming a radio frequency transmitter having an array antenna. The beamformed signal is transmitted for the benefit of a target communication unit based upon characteristics of a received signal. The method includes the steps of determining a transmit equalizer transfer function and receive equalizer transfer function for each array element of the antenna array based, at least in part, upon application of common input signals and comparison of outputs. The method further includes adaptively filtering a received signal, from a communication unit based, at least in part, upon the determined receive equalizer weights, to provide a receive beamform array. A beamformed signal may then be transmitted to the communication unit based upon the transmit equalizer weights and receive beamform array.

Beam pattern equalization method for an adaptive array

An apparatus for reducing audio interference produced by a transducer (18) in response to an audio signal has a first input for receiving the audio signal and a second input (22) for receiving sound signals. The audio interference affects a speech recognition system (34). The second input provides a possibly contaminated signal representing the sound signals. The sound signals comprise a desired audio signal, and possibly comprise the audio interference. An interference reduction device (30) is coupled to the first and second inputs, for transforming the possibly contaminated signal into features that are substantially free from the effects of the audio interference.

Interference reduction system for a speech recognition device

Various functions (or portions thereof) are associated with some of the words or instructions recognizable by a speaker independent voice recognition device (128). This association is presented to an operator via one or more menus (200a-200d) so that the operator may select any of several functions by use of a limited set of speaker independent commands.

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Grapevine, TX, United States of America

R Mark Harrison