RF communications system operable in the presence of a repetitive interference source and related methods
First Claim
1. A radio frequency (RF) communication system or operating in the presence of a repetitive RF interference source powered from an Alternating Current (AC) power line, the repetitive RF interference source having repetitive ON and OFF periods based upon the AC power line, the RF communication system comprising:
- a first device powered from an AC power line which also powers the repetitive RF interference source, said first device comprisingan RF transmitter for transmitting in a frequency band of the repetitive RF interference source,a power line sensor, anddata transmit control means for generating a plurality of data packets with each data packet including an error detecting portion, and for operating said RF transmitter to produce repetitive first and second transmissions of a same data packet responsive to said power line sensor so that at least one of the first and second transmissions occurs during an OFF period of the repetitive RF interference source; and
at least one second device comprisingan RF receiver for receiving in the frequency band of the repetitive RF interference source, anddata receive control means for receiving the repetitive first and second transmissions of same data packets and selecting one based upon the error detecting portions thereof to thereby avoid interference from the repetitive RF interference source.
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Accused Products
Abstract
An RF communication system is for operating in the presence of a repetitive RF interference source powered from an Alternating Current (AC) power line. The system uses redundant transmission synchronized to the power line to ensure accurate reception by at least one second device. The RF communication system includes a first device powered from an AC power line which also powers the repetitive RF interference source. The first device, in turn, preferably includes an RF transmitter for transmitting in a frequency band of the repetitive RF interference source, a power line sensor, and a data transmit controller. The data transmit controller generates a plurality of data packets with each data packet including an error detecting portion. The data transmit controller also operates the RF transmitter to produce repetitive first and second transmissions of a same data packet responsive to the power line sensor. Accordingly, at least one of the first and second transmissions occurs during an OFF period of the repetitive RF interference source. The second device also preferably includes a data receive controller for receiving the repetitive first and second transmissions of same data packets and selecting one based upon the error detecting portions thereof to thereby avoid interference from the repetitive RF interference source.
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Citations
40 Claims
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1. A radio frequency (RF) communication system or operating in the presence of a repetitive RF interference source powered from an Alternating Current (AC) power line, the repetitive RF interference source having repetitive ON and OFF periods based upon the AC power line, the RF communication system comprising:
a first device powered from an AC power line which also powers the repetitive RF interference source, said first device comprising an RF transmitter for transmitting in a frequency band of the repetitive RF interference source, a power line sensor, and data transmit control means for generating a plurality of data packets with each data packet including an error detecting portion, and for operating said RF transmitter to produce repetitive first and second transmissions of a same data packet responsive to said power line sensor so that at least one of the first and second transmissions occurs during an OFF period of the repetitive RF interference source; and
at least one second device comprisingan RF receiver for receiving in the frequency band of the repetitive RF interference source, and data receive control means for receiving the repetitive first and second transmissions of same data packets and selecting one based upon the error detecting portions thereof to thereby avoid interference from the repetitive RF interference source. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A radio frequency (RF) communication system for operating in the presence of a repetitive RF interference source powered from an Alternating Current (AC) power line, the repetitive RF interference source having repetitive ON and OFF periods based upon the AC power line, the RF communication system comprising:
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a first device powered from an AC power line which also powers the repetitive RF interference source, said first device comprising audio input means for accepting at least one audio signal for transmission, an RF transmitter for transmitting in a frequency band of the repetitive RF interference source, a power line sensor, and data transmit control means for generating a plurality of data packets from said at least one audio input means with each data packet including an error detecting portion, and for operating said RF transmitter to produce repetitive first and second transmissions of a same data packet responsive to said power line sensor so that at least one of the first and second transmissions occurs during an OFF period of the repetitive RF interference source; and at least one second device comprising an RF receiver for receiving in the frequency band of the repetitive RF interference source, data receive control means for receiving the repetitive first and second transmissions of same data packets and selecting one based upon the error detecting portions thereof to thereby avoid interference from the repetitive RF interference source, and at least one audio speaker operatively connected to said data receiver control means for reproducing the at least one audio signal. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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22. A radio frequency (RF) communication system for operating in the presence of a repetitive RF interference source powered from an Alternating Current (AC) power line having a plurality of phases, the repetitive RF interference source having repetitive ON and OFF periods based upon the AC power line, the RF communication system comprising:
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a first device powered from an AC power line which also powers the repetitive RF interference source, said first device comprising an RF transmitter for transmitting in a frequency band of the repetitive RF interference source, a power line sensor, data transmit control means for generating a plurality of data packets with each data packet including an error detecting portion, and for operating said RF transmitter to produce repetitive first and second transmissions of a same data packet responsive to said power line sensor so that at least one of the first and second transmissions occur during an OFF period of the repetitive RF interference source, and phase selecting means for selecting operation of the data transmit control means for one of the plurality of power phases; and at least one second device comprising an RF receiver for receiving in the frequency band of the repetitive RF interference source, and data receive control means for receiving the at least one transmission to thereby avoid interference from the repetitive RF interference source. - View Dependent Claims (23, 24, 25, 26, 27, 28, 29, 30)
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31. A method for operating a radio frequency (RF) communication system in the presence of a repetitive RF interference source powered from an Alternating Current (AC) power line, the repetitive RF interference source having repetitive ON and OFF periods based upon the AC power line, the RF communication system comprising a first device powered from an AC power line which also powers the repetitive RF interference source and at least one second device, the first device comprising an RF transmitter for transmitting in a frequency band of the repetitive RF interference, the at least one second device comprising an RF receiver for receiving in the frequency band of the repetitive RF interference source, the method comprising the steps of:
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sensing the AC power line; generating a plurality of data packets with each data packet including an error detecting portion, and for operating the RF transmitter to produce repetitive first and second transmissions of a same data packet responsive to the AC power line so that at least one of the first and second transmissions occurs during an OFF period of the repetitive RF interference source; and receiving at the RF receiver the repetitive first and second transmissions of same data packets and selecting one based upon the error detecting portions thereof to thereby avoid interference from the repetitive RF interference source. - View Dependent Claims (32, 33, 34, 35, 36, 37, 38, 39, 40)
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Specification