Patent ID: 7933318

Claim:
A transceiver unit comprising: a receiver adapted to receive from a physical channel a signal modulated over at least one carrier, a channel analysis unit coupled to said receiver, which determines a signal component and a noise component of one carrier out of said at least one carrier within a frequency interval while an initialization sequence is being transmitted over said at least one carrier, a communication unit which establishes a communication link with a peer transceiver unit, a power remote control unit coupled to said channel analysis unit and to said communication unit, which requests said peer transceiver unit to shut off said carrier if a ratio of said signal component to said noise component is lower than a first predetermined threshold, wherein said channel analysis unit determines a pure-noise component of said carrier, within said frequency interval, during said carrier being shut off, by measuring the pure-noise component at said carrier, and wherein said power remote control unit requests said peer transceiver unit to re-activate said carrier if a ratio of said signal component to said pure-noise component (SNR) is higher than a second predetermined threshold, wherein said channel analysis unit determines: an average signal power within said frequency interval, thereby determining said signal component while said initialization sequence is being transmitted over said at least one carrier, an average noise power within said frequency interval, thereby determining said noise component while said initialization sequence is being transmitted over said at least one carrier, and wherein said channel analysis unit determines an average pure-noise power within said frequency interval, thereby determining said pure-noise component after said carrier has been shut off.