高速数传QAM解调器设计及应用  

Design and Application of High-Data-Rate QAM Demodulator

作　　者：郭晓峰 郑雪峰 卢满宏 李艳华 

机构地区：[1]北京遥测技术研究所,北京100076

出　　处：《遥测遥控》2011年第3期21-25,共5页Journal of Telemetry,Tracking and Command

摘　　要：为满足国内外对高速数传设备的迫切需求,研究QAM体制在高速数传环境下的解调算法。采用并行滤波器架构及FFT架构对高速数据进行降速,并研究多种鉴相算法,以应对QAM信号在高速环境下的跟踪需求。经过实物设计验证,该解调器最高支持1.5Gb/s码率16QAM信号的解调,高斯白噪声下解调损失可控制在1dB以内。In order to meet the exigent requirement,this paper does research on the demodulation algorithm of QAM in the high-data-rate environment.The parallel filter architecture and FFT architecture are adopted to lower the high data rate.And several phase error computation algorithms are studied to meet the requirement of QAM signal tracking in the high-data-rate environment.The practical design and validation show that this demodulator can support up to 1.5Gb/s QAM signal,and behaves a good performance under AWGN that the loss of demodulation is controlled under 1dB.

关 键 词：高速数传 全数字架构 正交幅度调制 载波跟踪 

分 类 号：TN763[电子电信—电路与系统]