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IEICE Transactions on Communications 2007 E90-B(11):3287-3289; doi:10.1093/ietcom/e90-b.11.3287
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Copyright © 2007 The Institute of Electronics, Information and Communication Engineers

Regular Section -- Letters -- Wireless Communication Technologies

Effect of the Phase/Quadrature Error and I/Q Gain Imbalance for QAM Symbol Error Probability

Jinah PARK1, Seungkeun PARK1, Pyung-Dong CHO1 and Hyeong-Ho LEE1

1 The authors are with Protocol Engineering Center, Electronics and Telecommunications Research Institute, 161 Gajeong-dong, Yuseong-gu, Daejeon, 305-370, Korea. E-mail: pja63751{at}etri.re.kr


  Abstract

In this letter, we derive an analytical expression for computing the symbol error probability (SEP) of the M-ary quadrature amplitude modulation (M-QAM) in the joint presence of phase/quadrature error and I/Q gain imbalance over an additive white Gaussian noise (AWGN) channel. The derived expression containing only the two-dimensional Gaussian Q-function can be used to compute the SEP of M-QAM in various fading channels by making use of the moment-generating function (MGF) approach.

Key Words: QAM, symbol error probability, phase error, quadrature error, I-Q gain imbalance

Manuscript received June 19, 2006. Manuscript revised March 26, 2007.


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