Wireless communications systems

H - Electricity – 04 – K

Patent

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325/41

H04K 1/00 (2006.01) H04B 1/69 (2006.01) H04J 13/02 (2006.01) H04J 11/00 (2006.01) H04J 13/00 (2006.01)

Patent

CA 1312656

ABSTRACT OF THE DISCLOSURE A wireless packet communication system is operable in a frequency band occupied by other transmission sources. The system includes a base station and several remote stations. Each remote station has a transceiver for transmitting and receiving data packets on electromagnetic carriers. The carrier frequency of the transceiver is selected in a pseudorandom manner from a predetermined set of carrier frequencies prior to transmission of each packet or in response to detection of transmission errors. Each carrier frequency may be associated with a unique pseudorandom noise code used to spread spectrum encode packets. The base station has a number of transceivers which operate simultaneously at the different carrier frequencies and which generate differentnoise codes for spread spectrum encoding and decoding. The base station records data for each remote station identifying the transceiver which last received a data packet and transmits packets addressed to each remote station with the identified transceiver. - 21 -

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