Wireless radio modem with minimal inter-device RF interference
June 8, 2015. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesFM Feedback demodulator having threshold extension circuit with two-pole crystal filters High frequency discriminator with a crystal phase shift network FM Demodulator with selective phase shift circuits Meteor burst communication system QAM modulator circuit Wireless computer modem Rf fsk transmitter Digitally implemented modulators FM communication system with improved response to Rayleigh-faded companded signals Phase modulated system with phase domain filtering Inventors
AssigneeApplicationNo. 488695 filed on 06/08/1995US Classes:375/222, Modems (data sets)375/274, Minimum shift keying455/73TRANSMITTER AND RECEIVER AT SAME STATION (E.G., TRANSCEIVER)ExaminersPrimary: Bocure, TesfaldetAttorney, Agent or FirmForeign Patent References
International ClassesH04L 005/16H04L 027/10 AbstractA wireless radio modem that may be incorporated into a host system or connected through a PCMCIA or similar port to a host system includes radio frequency modulation/demodulation circuitry employing electronic device elements that operate in a frequency range that minimizes the RF interference between the radio modem and the host system. Radio modem power conservation is maximized by 1) simplifying signal modulation processing by use of a two-point waveform transition table, thereby reducing processing requirements; and 2)incorporating a "sleep mode" feature in which all non-timer circuitry is powered-down when not in use.Other References
Field of SearchModems (data sets)TRANSMITTERS Quadrature amplitude modulation Phase shift keying Quadrature amplitude modulation TRANSCEIVERS RECEIVERS Particular pulse demodulator or detector Minimum shift keying Minimum shift keying Minimum shift keying Phase shift keying Phase shift keying Having transmission of a digital message signal over a telephone line TRANSMITTER AND RECEIVER AT SAME STATION (E.G., TRANSCEIVER) Transceiver controlling a separate transceiver or receiver Transmitter oscillator used as local oscillator PHASE SHIFT KEYING MODULATOR OR QUADRATURE AMPLITUDE MODULATOR FREQUENCY SHIFT KEYING MODULATOR OR MINIMUM SHIFT KEYING MODULATOR FREQUENCY SHIFT KEYING OR MINIMUM SHIFT KEYING DEMODULATOR PHASE SHIFT KEYING OR QUADRATURE AMPLITUDE DEMODULATOR | |
