Patent ID: 8797112
Filing Date: 2014-08-05
Classification: H03C,H03D,H04L

Abstract:
1. An ASK modulator, comprising: a baseband unit configured to obtain a sequence comprising at least one amplitude value, and add an additional value to each of the at least one amplitude value to generate a modified sequence, wherein the additional value is determined based on a half scale of a digital-to-analog converter; and the digital-to-analog converter which is coupled to the baseband unit, and configured to convert the modified sequence to generate a first signal; and a mixer configured to receive the first signal and a second signal and generate a modulated signal by mixing the first signal with the second signal; wherein the baseband unit is further configured to provide at least one test value to the digital-to-analog converter; the digital-to-analog converter is further configured to receive the at least one test value and generate an indicator indicating if the at least one test value is within the scale of the digital-to-analog converter; the baseband unit is further configured to receive the indicator and determine the scale of the digital-to-analog converter and determining the additional value based on the half scale of the digital-to-analog converter.