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Abstract

A method and apparatus for improving loop stability and speed of a power control loop. Adjacent channel interference in the ramp-up and ramp-down (transient) of a TDMA burst is reduced. The present invention is used in a burst when the transient response and loop speed are important in the design of the control loop. The loop bandwidth variation resulting from linear conversion power detector and PIN diode RF attenuators in the loop is reduced by reducing the upper end of the loop bandwidth and increasing the lower end of the loop bandwidth. The upper limit of the loop bandwidth determines the loop stability and the lower limit of the loop bandwidth determines the minimum speed of the loop. A reference signal is sampled and processed to set a gain of a feedback loop in the power control loop. The setting of the gain of the feedback loop using the reference signal increases the lower loop bandwidth to increase a loop speed and decreases the upper loop bandwidth to increase a loop stability for the power control loop. Accordingly, the present invention not only improves the loop stability, but also the speed of the loop.

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First Claim