Patent ID: 8606197

Claim:
A pre-distortion method in a radio that transmits a dual band signal having a first signal substantially in a first band A and a second signal substantially in a second band B, the method comprising: up-sampling the first signal at a sampling rate, the sampling rate being chosen based at least in part on an intermediate frequency and a bandwidth of at least one of the first band and the second band to form a first up-sampled signal, the intermediate frequency being based at least in part on the bandwidth of at least one of the first band and the second band; up-sampling the second signal at the sampling rate to form a second up-sampled signal; tuning the first up-sampled signal by the intermediate frequency to produce a first tuned signal; and tuning the second up-sampled signal by minus the intermediate frequency to produce a second tuned signal; summing the first tuned signal and the second tuned signal to produce a third signal; and subtracting the second tuned signal from the first tuned signal to produce a fourth signal.