Importance

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Abstract

A receiving and transmitting apparatus includes receiver circuitry, sampling circuitry, downlink prediction circuitry, uplink prediction circuitry and gain calculation circuitry. A downlink signal is received at the receiver and sampled at the sampling circuitry. Downlink and uplink prediction circuitry is used to estimate transmission properties of the downlink and uplink signals, respectively. The downlink and uplink prediction circuitry estimates downlink and uplink signal properties based on a sequence of previous downlink signal samples and the uplink estimates, respectively, as well as corresponding sequences of tap coefficients. The gain calculation circuitry is coupled to the uplink predication circuitry and to a transmitter and can set a transmitter gain level based on the predicted uplink signal properties. A method of controlling power in a communication device includes storing a sequence of downlink signal samples, calculating a downlink signal estimate and an uplink signal estimate, and setting a transmission power level based on the estimated uplink signal. The downlink signal estimate is calculated using the sequence of downlink signal samples and a first sequence of tap coefficients. The uplink signal estimate is calculated using a sequence previous uplink signal estimates and a second sequence of tap coefficients.

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First Claim