Patent ID: 7082154
Filing Date: 2006-07-25
Classification: H04W

Abstract:
1. A power control circuit controlling a transmitting power, comprising: a first despread circuit despreading a received signal, which generates a first despread signal; a second despread circuit despreading the received signal, which generates a second despread signal; a first SIR (signal-to-interference plus noise power ratio) measurement circuit which generates a first SIR measurement value according to the first despread signal; a second SIR measurement circuit which generates a second SIR measurement value according to the second despread signal; a combining circuit which combines the first and second despread signals; a third SIR measurement circuit which generates a third SIR measurement value according to the combined signal; a memory which stores previous first, second and third SIR measurement values; an observation circuit which generates an observation, wherein the observation circuit comprises a first subtracter which subtracts the previous third SIR measurement value from a current third SIR measurement value and generates a first subtraction result; a first comparator which compares the first subtraction result and a first threshold value; a second subtracter which subtracts the previous first SIR measurement value from a current first SIR measurement value and generates a second subtraction result when the first subtraction result is less than the first threshold value; and a second comparator which compares the second subtraction result and a second threshold value and generates an observation result and a control circuit which controls the transmitting power according to the observation result.