【摘要】 本文以地铁无线数据传输实际研究为依据,介绍了(47,23)二次剩余码(Qaudratic Residue Codes)的基本概念及其应用。着重讨论编码,特别是译码和处理相位模糊的原理和方法。最后给出了现场实验情况及使用效果。更多还原

【Abstract】 Based on the practical developments abput radio data transmission in the subway, the basic concepts and application of the (47,23) quadratic residue code are introduced in this paper. We stress our discuss on principles and methods about coding, particularly decoding as well as the processing of indefinite phase. At last, the feild experiments and application effects are given in the conclusion.更多还原