Wireless interface for electronic devices located in enclosed spaces
First Claim
1. A wireless, backboneless communication system for transmitting and receiving radio frequency (RF) signals inside an enclosure having a high likelihood of multipath transmission and reception wherein the strength of said RF signals outside of said enclosure is limited by electromagnetic compatibility (EMC) and electromagnetic interference (EMI) standards, comprising:
- a first electronic device located in said enclosure;
a second electronic device located in said enclosure;
a first transmitter/receiver connected to said first electronic device for transmitting spread spectrum signals based on first transmit data generated by said first electronic device and for receiving spread spectrum signals; and
a second transmitter/receiver connected to said second electronic device for transmitting spread spectrum signals based on second transmit data generated by said second electronic device and for receiving spread spectrum signals, wherein said first and second transmitter/receivers operate between 100 to 900 MHz and said spread spectrum signals generated by said first and second transmitter/receivers are above a thermal noise threshold of said first and second transmitter/receivers and are below said EMC/EMI standards.
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0 Petitions
Accused Products
Abstract
A 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.
83 Citations
20 Claims
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1. A wireless, backboneless communication system for transmitting and receiving radio frequency (RF) signals inside an enclosure having a high likelihood of multipath transmission and reception wherein the strength of said RF signals outside of said enclosure is limited by electromagnetic compatibility (EMC) and electromagnetic interference (EMI) standards, comprising:
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a first electronic device located in said enclosure;
a second electronic device located in said enclosure;
a first transmitter/receiver connected to said first electronic device for transmitting spread spectrum signals based on first transmit data generated by said first electronic device and for receiving spread spectrum signals; and
a second transmitter/receiver connected to said second electronic device for transmitting spread spectrum signals based on second transmit data generated by said second electronic device and for receiving spread spectrum signals, wherein said first and second transmitter/receivers operate between 100 to 900 MHz and said spread spectrum signals generated by said first and second transmitter/receivers are above a thermal noise threshold of said first and second transmitter/receivers and are below said EMC/EMI standards. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A wireless communication system for transmitting and receiving radio frequency (RF) signals inside an enclosure having a high likelihood of multipath transmission and reception wherein the strength of said RF signals outside of said enclosure is limited by electromagnetic compatibility (EMC) and electromagnetic interference (EMI) standards, comprising:
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a first electronic device located in said enclosure;
a second electronic device located in said enclosure;
a first transmitter/receiver connected to said first electronic device for transmitting spread spectrum signals based on first transmit data generated by said first electronic device and for receiving spread spectrum signals; and
a second transmitter/receiver connected to said second electronic device for transmitting spread spectrum signals based on second transmit data generated by said second electronic device and for receiving spread spectrum signals, wherein said first and second transmitters/receivers operate between approximately 100 and 400 MHz, employ a data spread rate of approximately ten to one, and transmit and receive data between 10 and 40 Mbits per second, and wherein said spread spectrum signals generated by said first and second transmitter/receivers have a signal power above a thermal noise threshold of said first and second transmitter/receivers and below said EMC/EMI standards.
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18. A method of transmitting and receiving radio frequency signals between first and second electronic devices located inside an enclosure having a high likelihood of multipath transmission and reception, comprising the steps of:
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generating a first spread spectrum signal using a first transmitter/receiver connected to said first electronic device;
generating a second spread spectrum signal using a second transmitter/receiver connected to said second electronic device;
transmitting said spread spectrum signals in a frequency range between 100 and 900 MHz;
setting a maximum signal power of said spread spectrum signals below an electromagnetic compatibility (EMC) and electromagnetic interference (EMI) standard for radio frequency transmissions outside of said enclosure; and
setting a minimum signal power of said spread spectrum signals above a thermal noise threshold for said first and second transmitter/receivers. - View Dependent Claims (19, 20)
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Specification