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Adjusting the timing and synchronization of a radio's oscillator with a signal from an SATPS satellite Patent #: 5970400
ApplicationNo. 548698 filed on 04/13/2000
US Classes:375/130SPREAD SPECTRUM
ExaminersPrimary: Tse, Young T.
Attorney, Agent or Firm
Foreign Patent References
International ClassH04B 007/185
AbstractA wireless communication system for transmitting and receiving radio frequency (RF) signals inside an enclosure such as a hull of a torpedo, autonomous underwater vehicle, or aircraft, an automotive body, or a test equipment enclosure. The wireless communication system employs low power, low frequency, spread spectrum signals to reduce multi-path transmission and reception problems inside the enclosure. The wireless communication system includes first and second electronic devices located in the enclosure. A first transmitter/receiver is connected to the first electronic device. The first transmitter/receiver transmits spread spectrum signals generated by the first electronic device and receives spread spectrum signals. A second transmitter/receiver is connected to the second electronic device. The second transmitter/receiver transmits spread spectrum signals generated by the second electronic device and receives spread spectrum signals. The first and second transmitter/receivers operate above a thermal noise threshold of the first and second transmitter/receivers and below electromagnetic compatibility (EMC) and electromagnetic interference (EMI) standards. If the enclosure includes walls which separate the enclosure into multiple sections and the enclosure is metallic, apertures filled with a dielectric material and a dipole penetrator antennas can be employed to reduce attenuation.