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.

Automatic vehicle monitoring identification location alarm and voice communications system

Abstract: In a computer-controlled bus-monitoring system, each of the buses in the system is provided with a two-way radio for communication with the control center on either a voice channel or a data channel. In addition, each bus includes a second receiver for receiving signals from signpost transmitters located along the route, with the signpost information being stored in a temporary storage unit in the bus. The computer continually controls interrogation of all of the buses in the system on a data channel, with the buses automatically replying with the stored signpost location plus the time elapsed since that signpost location was stored in the bus. Deviations from schedule are displayed on a control console at the control center. The bus may be alerted to reply on a voice channel by a special code sent over the data channel with selective calling of the particular bus being provided, and a provision also is made for alerting the control center of an emergency on the bus by automatic data transmission from the bus over the voice channel.

System and method for bit timing synchronization in an adaptive direct sequence CDMA communication system

Abstract: In a CDMA communication system (100) capable of communicating between a receiver (20) and a transmitter (10) direct sequence spread spectrum communication signals (30), a system and method for synchronizing receiver bit timing and transmitter timing. Transmitter (10) transmits a training bit sequence (31) followed by a transmitter bit timing sequence (33). The receiver (20) adaptively determines a representation of a despreading chip sequence using a tapped delay line equalizer (400). Receiver bit timing offset is determined based on the representation of the despreading chip sequence and the transmitter bit timing sequence (33).

Manually controllable cursor in a virtual image

Abstract: Portable communication equipment having a virtual image display including display electronics and optics for providing a virtual image in the display, cursor electronics connected to the display electronics for producing a manually controllable cursor virtual image in the display, and manual controls mounted on the portable communication equipment and externally accessible by an operator. The manual controls are connected to the cursor electronics for controlling the position and function of the cursor virtual image to provide functions such as pull-down menus and image selection.

Active electrostatic transceiver and communicating system

Abstract: An active electrostatic transceiver is provided that has electrostatic electrodes, an energy storage means such as a battery and a transceiver circuit for communication within an electrostatic RFID communication system. The transceiver circuit includes power management features so that the energy storage means is not quickly depleted. Additionally the transceiver circuit includes amplifiers and filters so that the read range is further increased and noise sources are better filtered out. In a first embodiment, the transceiver circuit has a clock extractor that extracts a clock from the incoming data signal such that the clock and the data signal are synchronized so that demodulating the data from the data signal is simplified. In a second embodiment, the transceiver circuit has its own clock generator for initiating transmission of signals so that a reader need not have an exciter to generate an excitation signal. Each embodiment of the transceiver circuit has power management features so that power is conserved. Additionally, each transceiver circuit has the ability to operate in a passive mode, when there is insufficient charge in the energy storage means or a lower power mode is desirable.