Patent ID: 8705595

Claim:
A device ( 300 ) for performing power measurements in a cellular base station, comprising: a digital signal processing unit ( 310 ) configured to receive a digital input signal and to process the digital input signal including channelization into a processed digital signal; a transmitter ( 130 ) located on a transmission path, connected to the digital signal processing unit ( 310 ) and configured to receive the processed digital signal and to convert the processed digital signal into an analog Radio Frequency (RF) signal to be broadcasted; a feedback receiver ( 150 ) located on a feedback path, connected to the digital signal processing unit ( 310 ) and configured to receive an analog RF feedback signal corresponding to the analog RF signal to be broadcasted, to process and to convert the analog RF feedback signal into a digital feedback signal, said digital signal processing unit ( 310 ) being further configured to control attenuation along the transmission path and the feedback path based on a comparison of a power of the digital input signal with a raw power value of the corresponding digital feedback signal; and an output power calculator unit ( 320 ) for providing an output power value based on said raw power value, said output power value being adjusted based on gain variation information received at said feedback receiver; wherein said raw power value is based on the power (I 2 +Q 2 ) of said digital feedback signal and said gain variation information received at said feedback receiver comprises a nominal feedback receiver gain (NFRG), a feedback receiver deviation gain delta (FBGD) and a feedback digital attenuator delta (FDAD); wherein said FBGD is derived by halting power amplifier linearization activities of said cellular base station to allow an open loop operation loading NFRG values and estimating said FBGD in said feedback path.