Motorola Corporation

Other

ShaoWei Wei Pan

Shay-Ping T Wang

Scott Edward Lloyd

Stephen Chih-Hung Ma

Nicholas M Labun

Jeffrey G Toler

Jinzhong Zhang

Richard A Comroe

Bernard Eugene Sigmon

Kevin M Laird

Hechun Cai

Chunyang Meng

Jheroen Pieter Dorenbosch

James E Mitzlaff

Peter Lei

James Douglas Dworkin

Stephen L Smith

Stuart W Thro

John Michael Buss

Shmuel Silverman

Qiaobing Xie

Michael Karel Lindsey

Marilyn Rochelle Escue

John P Sawinski

Bruce A Oltman

Steve Whitney

Rich Comroe

Ramamoorthy Srinath

Srinivas L Panchumarthi

Mark O'Beirne

In accordance with the preferred embodiment of the present invention all remote units () participating in a group call can actively transmit uplink communications to their respective base stations () via low-data rate traffic channels (). The remote units having the highest transmit energies are summed and broadcast to all remote units () participating in the group call. Because only those remote units having the highest transmit energies are summed and broadcast, network congestion is greatly reduced.

Method and apparatus for multicasting in a wireless communication system

During a group call, each remote unit () receives a downlink supplemental transmission () that contains high-speed data (e.g., video). A single supplemental channel is utilized for each base station (). On the uplink side, the supplemental channel is shared among all remote units, however only one remote unit () is allowed to transmit at a time utilizing the uplink supplemental channel. A decision is made as to which remote unit is providing a highest-voice-energy fundamental channel uplink, and that remote unit is assigned the uplink supplemental channel. The remote unit, that is currently transmitting utilizing the uplink supplemental channel, has its transmission broadcast (via downlink supplemental channels ()) to all other remote units participating in the multicast.

Method and apparatus for assigning a remote unit a channel within a communication system

In a wireless code-division multiple access (CDMA) system (), a talkgroup () of subscriber units is provided. A sub-talkgroup () of subscriber units, forming a part of the talkgroup is assigned at least one inbound channel (). The talkgroup is assigned outbound channels (). Members of the sub-talkgroup may simultaneously transmit voice information () using the at least one inbound channel, which voice information is summed () and re-transmitted to the talkgroup using the outbound channels. Voice information is summed so that an individual talker receives summed voice information without the individual subscriber's voice content. Subscriber units in the sub-listengroup are allowed to transmit voice information only after requesting, and receiving, an additional inbound channel.

Method and apparatus for a talkgroup call in a wireless communication system

Apparatus and methods using a first service provider such as a WAN cellular service provider to initiate a communications exchange between a plurality of communications units and a second service provider such as WLAN service provider to provide enhanced communications services to the units has been disclosed and described.

Communication services through multiple service providers

In a wireless code-division multiple access (CDMA) system (,), a talkgroup (,) of subscriber units is provided. A sub-talkgroup (,) of subscriber units, forming a part of the talkgroup is assigned at least one inbound channel (,). The talkgroup is assigned outbound channels (,). Members of the sub-talkgroup may simultaneously transmit voice information (,) using the at least one inbound channel, which voice information is summed (,) and re-transmitted to the talkgroup using the outbound channels. Voice information is summed so that an individual talker receives summed voice information without the individual subscriber's voice content. Subscriber units in the sub-listengroup are allowed to transmit voice information only after requesting, and receiving, an additional inbound channel.

A method and apparatus for efficient power amplification of a wideband signal with a correspondingly wide modulation bandwidth includes an envelope detector (220), a soft switch modulator (270), and a power amplifier (260). The soft switch modulator (270) drives a high side switch (330), and a low side switch (340) to amplify a pulsewidth modulated signal. Electrical signal path lengths within a soft switch driver (320) are dynamically modified so as to always turn off one switch before turning on the other.

Method and apparatus for high efficiency power amplification

A system and method of using a computer processor (34) to generate a solution to a linear system of equations is provided. The computer processor (34) executes a Jacobi iterative technique to produce outputs representing the solution. Multiplication operations required by the iterative technique are performed using logarithmic arithmetic. With logarithmic arithmetic, a multiplication operation is accomplished using addition. For a given n.times.n matrix A, the computer processor (34) can compute an inverse matrix A.sup.-1 by repeatedly executing the iterative technique to solve n linear systems.

Method and system for solving linear systems

An electronic apparatus that includes a digital processor (12), a first digital pulse width modulator (304), a second digital pulse width modulator (306), a combining circuit (308), and a load (310). The digital processor (12) produces a first digital signal (314) and a second digital signal (316). The first digital pulse width modulator (304) is responsive to the first digital signal (314), and the second digital pulse width modulator (306) is responsive to the second digital signal (316). The combining circuit (308) is responsive to the first digital pulse width modulator (304) and the second digital pulse width modulator (306). The load (310) is responsive to the combining circuit (308).

Apparatus for amplifying a signal using digital pulse width modulators

An apparatus that includes a logarithm based processor (216) having at least one digital logarithm converter (202) and a power amplifier (208) responsive to the logarithm based processor (216).

Apparatus using a logarithm based processor

A method and system for a convolution operation in a digital signal processor (DSP) are provided. The convolution operation is performed in a logarithmic number system (LNS) domain. The DSP includes a plurality of processing elements that executes the convolution in a highly parallel fashion. The method can be implemented as a software program that directs a LNS based DSP to execute the convolution operation.

Method and system for performing a convolution operation

An apparatus for amplifying a signal that includes a digital processor (12) producing a first digital signal (20) and a second digital signal (22), a pulse width modulator (32) receiving the first digital signal (20) and producing a pulse width modulated signal, an amplitude restoration module (37) responsive to the pulse width modulator (32), the amplitude restoration module (37) producing an amplitude envelope signal, a frequency upconverter (16) receiving the second digital signal (22) and producing a frequency modulated signal, and a power amplifier (18) responsive to the frequency upconverter and the amplitude restoration module (37). The power amplifier receives the frequency modulated signal and the amplitude envelope signal and produces an amplified output signal.

Apparatus for amplifying a signal using a digital processor

In a video processing system (14), a method of detecting and compensating for motion of an image which includes the steps of: detecting a first pixel value, a second pixel value, and a third pixel value, the first pixel value of a first scan line in a first field, the second pixel value of a second scan line in the first field, and the third pixel value in a second field; providing a motion indicator based on the first, second, and third pixel values; selecting a plurality of interpolation coefficients from a memory based on the motion indicator signal; and providing an interpolated color space pixel based on a first color space pixel associated with the first pixel value, a second color space pixel associated with the second pixel value, and based on the plurality of interpolation coefficients.

Methods and systems for processing video signal pixel data

An LNS-based computer processor is provided for performing high-speed calculations that involve special function values. Special functions include transcendental and hyperbolic functions. The computer processor includes a decoder (11), a memory circuit (12) for storing a plurality of special function signals, a log converter (14), at least one processing element (16), and an inverse-log converter (18).

LNS-based computer processor and method of use thereof

Disclosed is a method for generating a high-resolution, real-time, digital video signal from an analog composite video signal such as an NTSC, PAL, or SECAM signal. The analog video signal is digitized and consecutive fields in the signal are merged to produce a frame. Non-uniform interpolation is performed between adjacent scan lines in the frame to generate the high-resolution video signal.

Method of generating high-resolution video

A computer processor that performs operations in a logarithmic number system (LNS) domain includes an input log converter (20), a feedback log converter (303), a first data pipeline (304), a second data pipeline (306), a plurality of processing elements (26a-f) coupled to respective stages of the data pipelines, an inverse-log converter (28), and a programmable accumulator (232) which produces output signals. An instruction, selected from a set of instructions, is decoded by a control unit (235) to configure the computer processor to perform operations on one or more data streams. Mathematical operations that can be performed by the processor include matrix multiplication, matrix-inversion, fast Fourier transforms (FFT), auto-correlation, cross-correlation, discrete cosine transforms (DCT), polynomial equations, and difference equations in general, such as those used to approximate infinite impulse response (IIR) and finite impulse response (FIR) filters. The computer processor can be used as a co-processor (340) in a general purpose computer system.

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Lake Zurich, IL, United States of America

ShaoWei Wei Pan