【作者】 肖朝晖；

【导师】 曾孝平；

【作者基本信息】 重庆大学 ， 电路与系统， 2007， 硕士

【摘要】 本课题来源于重庆市教委基于软件无线电的多模式调制解调关键技术研究的应用基础项目。主要工作如下:①分析了软件无线电中调制的基本原理,主要包括基带正交信号的产生和上变频算法两大部分。对AM, SSB (LSB, USB),DSB, 2PSK, 2FSK这五种调制样式信号的数字化调制算法分别进行了讨论,并进行了设计与仿真。②分析了信号的解调算法。从数字信号的正交变换理论出发,得出了通用正交解调模型,并以此为基础,推出节省硬件运算量的软件下变频算法,并进行了设计与仿真。③研究了上述几种调制信号的识别问题。本文采用特征参数统计识别算法进行分析,对AM, LSB, USB, DSB,2PSK, ASK, PSK,2FSK,4FSK,等调制样式信号自动识别进行了分析,并且给出算法流程框图和部分仿真。更多还原

【Abstract】 This topic come from chongqing municipal education commission,the research of multi-mode modem based on software radio.The main work that carry on is as follows:①studied many modes within the software wirelesses to make the solution to adjust the basic principle, mainly include the quadrature basedband signal to take and the calculate way of digital up conversion. To the AM, SSB( LSB, USB), DSB,2PSK,2FSK these five kinds of digital signal make the discussion of the calculate way.②studied the demodem solution based on the software radio.Based on the numerical signal of the quadrature transformation theories, get the general quadrature model for demodem, at the same time, this text makes the discussion about five kinds of signals to digital.③studies the problem to make the signal in the software wireless receiver of identify automatically above-mentioned several kinds.This text make the analysis of identify the calculate way according to the characteristic parameter, to the AM, LSB, USB, DSB,2PSK,ASK, 2FSK,4FSK,make the analysis to the style signal to identified automatically, and design the frame diagram for it, at the same time putting forward other characteristics parameter exaltation the rate of identify.更多还原