Spread spectrum power line communications

Details Spread spectrum power line communications Spread spectrum power line communications

H - Electricity

04

B

340/79

H04B 3/54 (2006.01) H04L 12/407 (2006.01)

Patent

CA 1302539

N-34-4279M/SK/86 SPREAD SPECTRUM POWER LINE COMMUNICATION ABSTRACT OF THE DISCLOSURE This invention is directed to various improvements in spread spectrum power line communications. One aspect of the invention relates to collision avoidance between various "slave" unit transmitters trying to send messages to a single "master" unit receiver by detecting whether the transmission path is in use and refraining from transmitting if it is. Other aspects of the invention relate to controlling the frequencies of spread spectrum data messages transmitted, the use of Gold's codes and switching frequency bands on the power line to avoid frequencies where there has been a deterioration of transmission.

615647

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