Exact and General Expression for the Error Probability of Arbitrary Two-Dimensional Signaling with I/Q Amplitude and Phase Unbalances

Jaeyoon LEE  Dongweon YOON  Kwangmin HYUN  

IEICE TRANSACTIONS on Communications   Vol.E89-B   No.12   pp.3356-3362
Publication Date: 2006/12/01
Online ISSN: 1745-1345
DOI: 10.1093/ietcom/e89-b.12.3356
Print ISSN: 0916-8516
Type of Manuscript: PAPER
Category: Wireless Communication Technologies
probability of error,  two-dimensional modulation,  I/Q unbalance,  

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The I/Q unbalance which is generated by a non-ideal component is an inevitable physical phenomenon and leads to performance degradation when we implement a practical two-dimensional (2-D) modulation system. In this paper, we provide an exact and general expression involving the 2-D Gaussian Q-function for the SER/BER of arbitrary 2-D signaling with I/Q amplitude and phase unbalances over an additive white Gaussian noise (AWGN) channel by using the coordinate rotation and shifting technique. Through Monte Carlo simulations we verify our expression provided here for 16-star Quadrature Amplitude Modulation (QAM).