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A Generalized Vectored-Implementation of 2n-QAM for Software Defined Applications

A generalized vectored-implementation algorithm for 2n-quadradure amplitude modulation (QAM) is proposed and its complexity is discussed. The proposed approach can be used for 2n-QAM with symmetric constellations. The implementation of the proposed approach has been investigated for rectangular, circular and spiral constellation forms. The proposed flexible algorithm has low complexity and occupies small storage memory of the software defined transceiver. The proposed approach uses basic operations and linear transforms such as rotation. An experimental implementation of the modulation on a low power ARM microcontroller and also implementation based on computer simulations are presented.