Patents Represented by Attorney, Agent or Law Firm Steven A. May
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Method and apparatus for providing a supply voltage based on an envelope of a radio frequency signal
Patent number: 6696866Abstract: An envelope tracking amplification system that includes an envelope tracking power supply (ETPS) amplifies a radio frequency (RF) signal to produce a linearized amplified signal. The envelope tracking amplification system samples the RF signal to produce a sampled RF signal. The ETPS produces a control signal based on an instantaneous magnitude of the sampled RF signal and further based on an average magnitude of the sampled RF signal, produces multiple supply voltages, and, based on the control signal, couples a supply voltage of the multiple supply voltages to an output of the EPTS to produce an output supply voltage. The envelope tracking amplification system then amplifies the RF signal based on the output supply voltage to produce a highly linear amplified signal.Type: GrantFiled: July 24, 2002Date of Patent: February 24, 2004Assignee: Motorola, Inc.Inventor: James E. Mitzlaff -
Patent number: 6693535Abstract: A passenger compartment monitoring and control system provides for remote control of an undesirable condition inside a vehicle. The passenger compartment monitoring and control system includes an undesirable condition sensor disposed in the interior of the car that detects the undesirable condition. In response to a signal from the sensor, a controller contained within the vehicle and operably coupled to the sensor generates at least one control signal based on the comparison. A wireless communication device operably coupled to the controller then transmits a wireless signal in response to the at least one control signal. The transmitted wireless signal may be received by a vehicle operator's mobile station or by a call center, which are each capable of then engaging in remedial actions to remotely ameliorate the undesirable condition.Type: GrantFiled: November 29, 2001Date of Patent: February 17, 2004Assignee: Motorola, Inc.Inventors: James A. Van Bosch, Philip H. Burrus, Nicholas C. Hopman, Robert F. D'Avello
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Patent number: 6678258Abstract: A packet data communication system (100) that includes a plurality of communication units and a fixed infrastructure comprising a packet data routing system (101, 103) and a plurality of base sites (111-119), emloys a method and apparatus for paging a communication unit (110). The fixed infrastructure (101, 103, 111-119) transmits a paging message to a communication unit (110) of the plurality of communication units. In response to receiving the paging message, the communication unit (110) transmits an acknowledgment. If the fixed infrastructure (101, 103, 111-119) fails to receive the acknowledgment within a certain waiting period, the fixed infrastructure (101, 103, 111-119) waits at least until the expiration of a backoff period before again transmitting a paging message, wherein the length of time of the backoff period is based on a metric of known system behavioral patterns.Type: GrantFiled: November 30, 1998Date of Patent: January 13, 2004Assignee: Motorola, Inc.Inventors: Tomas Capurka, Paula Tjandra
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Patent number: 6671518Abstract: A typical radio frame (300) comprises A, B, and C vocoded bits (304). At the end of each frame (300) A and B bits (305) are inserted from a previous frame. Thus, each frame not only comprises A, B, and C bits (304) for that frame, but also comprises those A and B bits (305) originally transmitted in a prior frame. Thus, each frame comprises high and low priority vocoded bits (304) from the current vocoder frame, and those higher priority bits from a preceding frame (305). By placing an inner CRC (302, 303) around the most important bits of the vocoded frame, even though a frame is erased (e.g. its outer CRC (301) failed) it can still be verified that the most important bits in the vocoded frame are correct. Since the class B and C bits can tolerate some errors, the vocoded frame can then play out if its inner CRC passes.Type: GrantFiled: November 15, 2002Date of Patent: December 30, 2003Assignee: Motorola, Inc.Inventors: John M. Harris, Tyler A. Brown, Lee M. Proctor, Robert D. Battin
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Patent number: 6665549Abstract: A system (10) alerts mobile devices (12) that are powered by replenishable power sources (14). A communications link is established between a replenishment service provider and the mobile devices (12). The replenishment service provider alerts the mobile devices (12) as to the availability of one or more replenishment services within a service area.Type: GrantFiled: June 10, 2000Date of Patent: December 16, 2003Assignee: Motorola, Inc.Inventor: John Douglas Reed
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Patent number: 6665283Abstract: A wireless communication system transmits data over a first link from a first mobile station (MS) to an infrastructure at a first speaker link power level, and over a second link from the infrastructure to a second MS at a first listener link power level, during a first time period. Each of the first power levels is designed to avoid the need for retransmissions of erroneously received data. Upon expiration of the first time period, data is transmitted over the first and second links at reduced power levels, which transmissions include retransmissions of erroneously received data. Error targets used in the transmission of data may also be adjusted after expiration of the first time period. In addition, the power levels and error rate targets may be individually adjusted on a link-by-link basis based on the RF loading of each link and/or based on error metrics determined for each link.Type: GrantFiled: October 5, 2001Date of Patent: December 16, 2003Assignee: Motorola, Inc.Inventors: John M. Harris, Paul M. Erickson
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Patent number: 6661284Abstract: A base station subsystem includes at least one transmit branch having a forward path that includes a signal processing unit coupled at an input to an input Fourier Transform Matrix (FTM) and at an output to an output FTM. The transmit branch further includes two error compensation loops, an inner feedback loop and an outer feedback loop. The inner feedback loop provides error compensation for error introduced by the signal processing section to a signal input to the transmit branch. The outer loop provides error compensation for all residual error introduced into the signal when routed through the transmit branch forward path after error compensation may be performed by the inner feedback loop.Type: GrantFiled: May 15, 2002Date of Patent: December 9, 2003Assignee: Motorola, Inc.Inventors: Yuda Luz, Jiangnan Jason Chen, Philip Zhou
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Patent number: 6633147Abstract: A method for closing a motor-driven window is disclosed, including the steps of raising the window after the window has been stopped; evaluating the torque after initially raising the window; and stopping the window if the pinch force exceeds a predetermined limit. Torque is preferably estimated according to the present invention using the sum of dynamic torque, electromagnetic torque, and core loss compensation. Consistent values of torque are estimated during window starts and stops, which is beneficial in providing accurate pinch force measurements and avoiding false pinch indications.Type: GrantFiled: May 25, 2001Date of Patent: October 14, 2003Assignee: Motorola, Inc.Inventor: Robert Gerbetz
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Patent number: 6628953Abstract: A remote unit (101) monitors a control channel for a base station (103) and sends a probe message (301) to the base station (103). The base station (103) forwards the probe message with location information (305) to a controller (115). The controller (115) determines an approximate distance for the remote unit (101). Based on the approximate distance, the controller (115) determines at least one additional site. A channel assignment message (309 or 401) is forwarded to the remote unit (101), which message includes one or more traffic channels associated with at least one of the base station (103) and the at least one additional site.Type: GrantFiled: July 10, 2000Date of Patent: September 30, 2003Assignee: Motorola, Inc.Inventors: Matthew James Dillon, Bogdan R. Nedelcu
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Patent number: 6622278Abstract: A wireless communication system includes a transmitting device having a formatting circuit. The formatting circuit for constructing a frame, the frame including frame header, frame CRC, and a message slot. The message slot having a predetermined length for carrying signaling message, the signaling message including a message header having the message length, a message body and a message CRC, the message body and message CRC being repeated to fill the message slot, a partial copy being copied into the message slot if the slot is not full and a full copy of the message body and message CRC will not fit. A receiving device includes a format circuit coupled to the decoder for outputting a message from the decoded frame, the format circuit to check the frame CRC to determine if the frame CRC is good, to check the message CRC to determine if the message CRC is good, and to reconstruct the message from the full and partial copies of the message if the message CRC is not good.Type: GrantFiled: August 8, 2000Date of Patent: September 16, 2003Assignee: Motorola, Inc.Inventors: William Morgan, Michael J. Kinnavy, Michael Mao Wang
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Patent number: 6606483Abstract: A linear transmitter includes an amplifier feedback loop for amplifying an input signal at a power amplifier. The feedback loop is operated in an open loop mode when the power amplifier is operating at a first operating point and is operated in a closed loop mode when the power amplifier is operating at a second operating point. The transmitter further includes an auxiliary loop coupled to the amplifier feedback loop that provides phase training for the feedback loop and power leveling when the feedback loop is operating open loop. Open loop phase training and power leveling is done during open loop transmission, without an associated training signal or training period. Stable closed loop operation can commence subsequently providing the higher power amplifier efficiency associated with the second operating point and maintaining off channel interference requirements.Type: GrantFiled: October 10, 2000Date of Patent: August 12, 2003Assignee: Motorola, Inc.Inventors: Michael H. Baker, William J. Turney, Paul H. Gailus
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Patent number: 6600369Abstract: A wideband linear amplification system amplifies an input signal to produce an amplified output signal. An envelope detector determines an envelope detector signal based on the input signal. An amplifier bias controller produces multiple control signals based on the envelope detector signal. A predistortion signal loop modifies the input signal, using a companion amplifier stage, based on a first control signal of the multiple control signals to produce a predistorted input signal that includes a distortion component introduced by the companion amplifier stage. A main amplifier stage amplifies the predistorted input signal to produce the amplified output signal based on a second control signal of the multiple control signals, wherein the distortion component of the predistorted input signal at least partially cancels a distortion component introduced to the amplified output signal by the main amplifier stage.Type: GrantFiled: December 7, 2001Date of Patent: July 29, 2003Assignee: Motorola, Inc.Inventor: James E. Mitzlaff
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Patent number: 6580769Abstract: A decoding method and apparatus performs a forward recursion process on recursive convolutionally generated symbols and performs backward recursion on the symbols wherein a next state for the backward recursion process is based on linearly combining both a plurality of bits defining a current state of a backward recursion process and a hypothesized information bit. In one embodiment, a backward state determinator (200) combines all binary bits in a current state backward recursion register (202) to generate a most significant bit (MSB) (210) of a next state backward recursion register (204). To obtain remaining bits of the next state backward recursion register (204), bits (207a-207n) in the current state backward recursion register (202) are shifted. The shifted bits then serve as the least significant bits (208a-208n) in the next state backward recursion register (204).Type: GrantFiled: February 14, 2000Date of Patent: June 17, 2003Assignee: Motorola, Inc.Inventors: Tyler Brown, Michael M. Wang
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Patent number: 6577488Abstract: An inductive load driver having an inductive load and a bridge circuit connected in parallel with the inductive load, wherein the bridge circuit generates a current to the inductive load that rapidly rises.Type: GrantFiled: January 14, 2000Date of Patent: June 10, 2003Assignee: Motorola, Inc.Inventors: Betty-Rose G. Seifert, James A. Freeman, Salvatore Albanese
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Patent number: 6570861Abstract: A radio communication system assigns use of a radio frequency communication resource comprising multiple communication channels in a way that minimizes the likelihood that a weakly received signal will be interfered with by a strongly received signal in an adjacent communication channel. The communication system determines a signal strength of a signal received from a user of the communication resource and, based on the signal strength determination, assigns the user one or more of the communication channels that are then available.Type: GrantFiled: November 20, 1998Date of Patent: May 27, 2003Assignee: Motorola, Inc.Inventors: Mark J. Marsan, Leigh M. Chinitz
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Patent number: 6570509Abstract: In a data transmitter having a data encoder, an encoder mode is detected. Thereafter, an excluded codeword output by the encoder operating in the encoder mode is identified. Next, a selected bit in the excluded codeword caused to have a predetermined value to produce a non-excluded codeword. Finally, the excluded codeword is substituted with the non-excluded codeword, wherein the non-excluded codeword is selected to mitigate effects of a decoding error in a receiver associated with the excluded codeword.Type: GrantFiled: February 28, 2001Date of Patent: May 27, 2003Assignee: Motorola, Inc.Inventors: Mark D. Hetherington, Lee Michael Proctor
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Patent number: 6567667Abstract: A cellular system (100) includes network equipment (102, 104) and user equipment (106). The network equipment can operate to inspect incoming messages from user equipment to identify service applications and direct incoming messages using the domain specified by the user equipment. User equipment can operate to construct messages for communication to a base station, which messages specify one of the circuit switch service domain (206) and the packet switch service domain (204) for the service and transmitting the constructed message to the base. According to one aspect of the system, the network equipment can transmit application and service information to the user equipment, responsive to which the user equipment can select the preferred domain for a message or session.Type: GrantFiled: August 23, 2000Date of Patent: May 20, 2003Assignee: Motorola, Inc.Inventors: Sanjay Gupta, Stephen Spear, Kanapathipillai Ketheesan
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Patent number: 6542744Abstract: A handoff method in a cellular network for switching from an old base transceiver station (BTS) to a target BTS in an uninterrupted manner is provided according to the invention. The method includes the steps of determining the target BTS, establishing communication between the mobile station and the target BTS, wherein the mobile station receives communications continuously from both the old BTS and the target BTS, and terminating the transmission to the old BTS. The terminating step does not occur until after establishing communication between the mobile station and the target BTS.Type: GrantFiled: June 20, 2000Date of Patent: April 1, 2003Assignee: Motorola, Inc.Inventor: Harn-Jier Lin
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Patent number: 6505058Abstract: The present invention provides a method for determining whether to wake up a mobile station. The mobile station includes first configuration parameters relating to a base station. The method includes the steps of receiving a configuration change indicator at the mobile station. The configuration change indicator is indicative that the first configuration parameters relating to the base station are different than second configuration parameters that currently relate to the base station. The method further includes waking up the mobile station to receive the second configuration parameters.Type: GrantFiled: February 26, 1999Date of Patent: January 7, 2003Assignee: Motorola, Inc.Inventor: W. Daniel Willey
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Patent number: 6501661Abstract: An electronic control unit (ECU) includes a flexible circuit substrate having a first partition interconnected to a third partition by a second, flexible partition. The electronic control unit further includes a rigidizer having a first partition interconnected to a third partition by a second partition. When the ECU is twice folded, the second, flexible partition of the circuit substrate assumes an approximate ‘U’-shape, resulting in a reduced cracking and splitting rate than the prior art. In various embodiments of the present invention, the assumption of a ‘U’-shaped fold in the second, flexible partition of the circuit substrate is facilitated by multiple apertures in a second rigidizer partition, by a depression in a second rigidizer partition, or by non-slidably affixing a first circuit substrate partition to a first rigidizer partition via a first adhesive and non-slidably affixing a third circuit substrate partition to a third rigidizer partition via a second adhesive.Type: GrantFiled: December 21, 2001Date of Patent: December 31, 2002Assignee: Motorola, Inc.Inventors: Kevin D. Moore, Thomas P. Gall, Jeffrey Lord