Motorola

About: Motorola is a company organization based out in Schaumburg, Illinois, United States. It is known for research contribution in the topics: Signal & Communications system. The organization has 27298 authors who have published 38274 publications receiving 968710 citations. The organization is also known as: Motorola, Inc. & Galvin Manufacturing Corporation.

Simulcast synchronization and equalization system and method therefor

Abstract: A control station (12) initiates a system timing signal transmission which is re-transmitted from a satellite (14). In response to receiving the system timing signal, the control station (12) then generates a time correction factor which is distributed to a plurality of transmission stations (16, 18). The transmission stations (16, 18) in response to receiving the system timing signal transmission and the time correction factor distributed from the control station (12) generate a time adjustment factor which is used to correct the local transmission clocks (36, 36'), thereby providing time synchronization of data transmissions generated from the transmission stations (16, 18).

Responsive routing control method and apparatus

Abstract: A method and apparatus for controlling routing within a communication system (10) modifies (258) routing tables (220, 230, 232, 234, 236) located within nodes (150) so that received data packets are not returned directly to their sending nodes. In response to detection (352) of a failed link, a node (150) modifies (354) its routing tables (220, 230, 232, 234, 236) to avoid the failed link. After notification (402) of the failed link, a control facility (28) responds by creating (404) commands that compensate for the failed link. The control facility (28) sends (404) the commands to at least the node (150) that detected the failed link. If not already performed by the control facility (28), the node (150) then modifies (364, 366) its routing tables (220, 230, 232, 234, 236) so that data packets are not returned to their sending nodes, and to avoid the failed link.

Method and apparatus for marking messages in selective call receivers

Abstract: A selective call receiver device (10) having a processor readable medium of instructions (100) for setting markers (32) in a message for automatically tabbing to the markers (32) and including a processor (50), message marking and incrementing system (36) and a plurality of tactile keys (30, 22, 24) for manipulating the code (100), and a method for operating the device (10) and for setting markers (32) at selected locations within messages to facilitate direct access to the portions of the message marked.

Automatic audio transducer adjustments based upon orientation of a mobile communication device

Abstract: A solution for automatically activating different audio transducers of a mobile communication device based upon an orientation of the device. In the solution, a series of speaker/microphone assemblies can be positioned on the device, such as positioned near an earpiece and positioned near a mouthpiece. Different speaker/microphone assemblies can also be positioned on the front of the device and on the back of the device. The solution can automatically determine an orientation for the device, based upon a detected direction of a speech emitting source and/or based upon one or more sensors, such as a tilt sensor and an accelerometer. For example, when a device is in an upside down orientation, an earpiece microphone and a mouthpiece speaker can be activated. In another example, an otherwise deactivated rear facing speaker can be activated when the device is oriented in a rear facing orientation.

Method and apparatus for generating reference signals for accurate time-difference of arrival estimation

Abstract: A base station communicates a positioning reference signal (PRS) to wireless communication devices over a downlink in a wireless communication system by encoding a PRS into a first set of transmission resources, encoding other information into a second set of transmission resources, multiplexing the two sets of resources into a subframe such that the first set of resources is multiplexed into at least a portion of a first set of orthogonal frequency division multiplexed (OFDM) symbols based on an identifier associated with the base station and the second set of resources is multiplexed into a second set of OFDM symbols. Upon receiving the subframe, a wireless communication device determines which set of transmission resources contains the PRS based on the identifier associated with the base station that transmitted the subframe and processes the set of resources containing the PRS to estimate timing (e.g., time of arrival) information.