초록 ▼

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 communicati

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.

대표청구항 ▼

[ That which is claimed is:] [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 li

[ That which is claimed is:] [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.