| 摘要 |
A wireless packet communication system is operable in a frequency band occupied by other transmission sources. The system includes a base station (10) and several remote stations (12, 14, 16). Each remote station (12, 14, or 16) has a transceiver (26, 30 or 32) for transmitting and receiving data packets on electromagnetic carriers. The carrier frequency of the transceiver (12, 14 or 16) 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 (10) has a number of transceivers (16, 20, 22, 24) which operate simultaneously at the different carrier frequencies and which generate different noise codes for spread spectrum encoding and decoding. <IMAGE>
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