Patent ID: 8503952

Claim:
A method of compensating for an asymmetric frequency response of a radio, comprising: estimating a slope control signal, the slope control signal indicating a slope of a frequency response of an amplifier chain of the radio; adjusting a complex baseband signal with the slope control signal to produce an adjusted complex baseband signal, wherein the adjusting comprises adjusting a difference between gain at positive frequencies and gain at negative frequencies, the complex baseband signal comprising an I component and a Q component; frequency up-converting the adjusted complex baseband signal into a radio signal; amplifying the radio signal to produce an amplified radio signal; and transmitting the amplified radio signal, wherein estimating the slope control signal comprises retrieving, based on a carrier frequency of the radio signal, the slope control signal from a look up table, wherein the look up table receives as an input the carrier frequency of the radio signal and produces as an output the slope control signal, and wherein the look up table pre-characterizes the slope control signal over a plurality of carrier frequencies.