Abstract: Briefly, a method and apparatus for decoding and authenticating an antenna is disclosed. The method may include detecting attachment of an antenna to a transmitter by authenticating a cipher received from the antenna. The method further includes suspending transmission if the antenna is not attached to the transmitter.

Abstract: Briefly, a method and apparatus for decoding and authenticating an antenna is disclosed. The method may include detecting attachment of an antenna to a transmitter by authenticating a cipher received from the antenna. The method further includes suspending transmission if the antenna is not attached to the transmitter.

Abstract: A communication system and method requiring minimal adaptation of TDD equipment to support an FDD frame structure, includes a novel frame structure by which a plurality of user stations, each having a single frequency synthesizer, communicate with a base station. According to the frame structure, a time frame comprises a plurality of time slots each divided into a first time segment and a second time segment. Transmissions from user stations are sent over the user transmission frequency band, and alternate in time with transmissions from the base station sent over the base transmission frequency band in a manner to provide adequate transmit/receive switching time for the user stations. The user stations preferably transmit to the base station in the first time segment of a time slot, and the base station preferably transmits in the second time segment of a time slot, such that the base station and user stations do not transmit simultaneously.