Title :
Compensation of I/Q imbalance in M-QAM tranceiver with multi-antennas
Author :
He, Dongmei ; Wang, Longping ; Liu, Yating ; Li, HuiYong
Author_Institution :
Sch. of Electron. Eng., Univ. of Electron. Sci. & Technol. of China, Chengdu, China
Abstract :
An approach to the compensation of I/Q imbalance is discussed in this paper. A method based on the least squares (LS) is proposed. Although digital orthogonal demodulation provides an efficient means for system and circuit designers to avoid the effect which is caused by local oscillation (LO), to sample broadband signal with high-rate analog-to-digital (ADC) suffers from high cost and increases difficulty of the implement of FPGA. This paper presents a rigorous analytical model for analyzing the effects of local oscillator output imperfection of in-phase/quadrature (1/Q) imbalance on M-ary quadrature amplitude modulation (M-QAM) transceiver performance. Then a method of compensation of the 1/Q imbalance is proposed according to the model.
Keywords :
antenna arrays; demodulation; field programmable gate arrays; least squares approximations; quadrature amplitude modulation; radio transceivers; FPGA; I-Q Imbalance; LO output imperfection; LS; M-QAM tranceiver; M-ary quadrature amplitude modulation transceiver performance; broadband signal; circuit designers; digital orthogonal demodulation; high-rate ADC converter; high-rate analog-to-digital; in-phase-quadrature imbalance; least squares; local oscillator output imperfection; multiantennas; rigorous analytical model; Demodulation; OFDM; Quadrature amplitude modulation; Receivers; Signal to noise ratio; System performance; Symbol error rate (SER); in-phase/quadrature (1/Q) imabalance; quadrature amplitude modulation (QAM);
Conference_Titel :
Consumer Electronics, Communications and Networks (CECNet), 2012 2nd International Conference on
Conference_Location :
Yichang
Print_ISBN :
978-1-4577-1414-6
DOI :
10.1109/CECNet.2012.6201743
