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Symbol Error Probability of DVB-S2 System with I/Q Unbalances  

Im, In-Chul (삼성전자 정보통신총괄)
Won, Seung-Chan (삼성전자 정보통신총괄)
Yoon, Dong-Weon (한양대학교 전자통신컴퓨터공학부)
Park, Sang-Kyu (한양대학교 전자통신컴퓨터공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.32, no.9C, 2007 , pp. 810-819 More about this Journal
Abstract
The I/Q unbalance which is generated by non-ideal components such as a $90^{\circ}$ phase shifter and I/Q filters is an inevitable physical phenomenon and leads to performance degradation when we implement a coherent two-dimensional (2-D) modulation/demodulation system. This paper provides an exact and general expression for the SEP(symbol error probability) of DVB-S2 system with I/Q phase and amplitude unbalance over AWGN channel. Coordinate rotation and shift techniques used to redefine a received signal are key mathematical tools. In conclusion, the derived result is expressed as a linear combination of the 2-D Gaussian Q-functions.
Keywords
Symbol Error Probability; I/Q unbalance; DVB-S2; Two-dimensional modulation;
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