Patent ID: 7099626

Claim:
A method of gain equalization based on a wide-band multi-carrier base station, comprising the steps of: a) calculating a gain of respective carriers at an output port of a digital to analog converter (DAC) and normalizing to obtain a first gain correction factor table with a plurality of respective first gain correction factors; b) testing the gain of the respective carriers in a radio frequency portion and normalizing to obtain a second gain correction factor table with a plurality of respective second gain correction factors, wherein the step of obtaining the second gain correction factors comprises the steps of: outputting one of the carriers with a proper level by the DAC to the radio frequency portion through setting; changing a local oscillator frequency; varying a final output signal arbitrarily with a step Δ within a frequency bandwidth f 3 –f 4 ; testing corresponding gain values to find a maximum value; using the maximum value as a reference to normalize the gain values of frequency points of the respective carriers; and taking reciprocal values to obtain the second gain correction factors of the frequency points of the radio frequency portion; c) storing the first and second gain correction factor tables; and d) looking up a first gain correction factor from the first gain correction factor table and a second gain correction factor from the second gain correction factor table corresponding to each of the carriers, and multiplying the first gain correction factor with the second gain correction factor, and using multiplied result as a gain-adjust-coefficient of the respective carrier.