Back to results
US 6,473,016 B2Granted
Method and apparatus for implementing automatic gain control in a system
AssigneeNokia Networks Oy
InventorsOlli Piirainen, Markku Tirkkonen
Life of this patent
Estimating the term…
Loading patent…
Loading patent…
AssigneeNokia Networks Oy
InventorsOlli Piirainen, Markku Tirkkonen
Estimating the term…
The invention relates to a method and an apparatus for implementing automatic gain control in a system where an analog signal is converted into a digital signal. The apparatus comprises means (208) for performing automatic gain control of the adjustable signal in an analog manner using a gain control step of predetermined size and means (446, 448) for performing inverse gain control of the digitized signal in such a way that, after the digital adjustment, the power of the signal is the same as before the analog adjustment. To enable an accurate gain control, the apparatus further comprises means (410, 412, 214, 420) for determining the maximum energy of the signal during a predetermined measurement period, means (426, 428) for comparing the determined maximum energy to preset threshold values (430, 432), and means (436) for performing an automatic gain control of the analog signal and a compensation for the gain control to the digital signal, if the measured value exceeds the threshold.
A method for implementing automatic gain control in a system where an analog signal is converted into a digital signal and where automatic gain control of an adjustable signal is performed in an analog manner using gain control of a predetermined size and where inverse gain control of the digital signal is performed such that the power of the adjustable signal after digital adjustment is the same as before the analog adjustment, the method comprising:
An apparatus for implementing automatic gain control in a system where an analog signal is converted into a digital signal and which system includes means for performing automatic gain control of an adjustable signal in an analog manner using gain control of a predetermined size and means for performing inverse gain control of the digital signal such that the power of the adjustable signal after digital adjustment is the same as before analog adjustment, the apparatus comprising:
An apparatus to implement automatic gain control a system where an analog signal is converted into a digital signal, the system including structure to perform automatic gain control of an adjustable signal in an analog manner using gain control of a predetermined size and to perform inverse gain control of the digital signal such that the power of the adjustable signal after digital adjustment is the same as the power of the adjustable signal before analog adjustment, the apparatus comprising:
Dependencies are inferred from the claim text.