Quadrature amplitude modulator with distortion compensation
作者： Hiroshi Suzuki
DOI:
关键词: Baseband 、 Modulation 、 Distortion 、 DC bias 、 Quadrature (mathematics) 、 Amplitude 、 Quadrature modulation 、 Mathematics 、 Control theory 、 Amplitude distortion
摘要: A quadrature amplitude modulator is described, which capable of accurately compensating for linear distortions occurring during the modulation process. The includes a signal level detector (3) whose output connected to parameter generation unit (4), determines particular transformation be applied I and Q baseband signals. parameters are calculated in following order: DC offset, balance, error. Each correction such way as not interfere with due previously parameters.
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