AN ADAPTIVE LINEARIZATION TECHNIQUE FOR COMMUNICATION BUILDING BLOCK

摘要

The present invention is directed to a linearization apparatus and method. Preferred embodiments according to the present invention can combine an auxiliary non-linear block (300) to a functional block of a system to increa se linearity of an output signal (520) of the system such as a communication system. System overhead due to the non-linear auxiliary block can be small because of circuit structure, cost and low consumption. Further, the non- linear auxiliary block can be designed so that no feedback path is required. Further preferred embodiments can use a feedback path without loss of stability by using a cancellation apparatus or process based on an averaging detection of the output signal. For example, a feedback loop can detect powe r leakage in a sideband caused by non-linearities of the communication system.