The present invention is a communication system and method having a base station for communication with multiple remote units. The system comprises a base station which utilizes a plurality of sets of frequencies for selectively communicating with remote units in a predefined coverage area. The coverage...http://www.google.fr/patents/US6507600?utm_source=gb-gplus-shareBrevet US6507600 - Frequency hopping code division multiple access system and method
Frequency hopping code division multiple access system and method