Iterative demapping for QPSK modulation

作     者：ten Brink, S Speidel, J Yan, RH 

作者机构：Univ Stuttgart Inst Telecommun Dept 0408 D-70569 Stuttgart Germany Lucent Technol Bell Labs Swindon SN5 6PP Wilts England 

出 版 物：《ELECTRONICS LETTERS》 (电子学快报)

年 卷 期：1998年第34卷第15期

页      面：1459-1460页

核心收录：

学科分类：0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 08[工学] 

主　　题：anti-Gray mapping Rayleigh-fading channels Interpolation and function approximation (numerical analysis) soft demapper QPSK modulation Codes quadrature phase shift keying additive white Gaussian noise decoding serial concatenation convolutional decoder white noise iterative demapping convolutional codes Rayleigh channels decoding scheme iterative methods a priori information fading Gaussian noise 

摘      要：The authors present an iterative decoding scheme which is particularly suited for quadrature phase shift keying (QPSK) modulation with anti-Gray mapping. Al the receiver, a soft demapper accepting a priori information and a convolutional decoder are applied in a serial concatenation. Numerical results are presented for QPSK in additive white Gaussian noise and Rayleigh-fading channels. The iterated system applying anti-Gray mapping outperforms the conventional system using Gray mapping after only one iteration.