价值工程
價值工程
개치공정
VALUE ENGINEERING
2015年
15期
211-213
,共3页
张鹏%周旭广%路正高%杨志强
張鵬%週旭廣%路正高%楊誌彊
장붕%주욱엄%로정고%양지강
Costas环%FFT%FPGA
Costas環%FFT%FPGA
Costas배%FFT%FPGA
Costas loop%FFT%FPGA
针对通信等领域中的接收端载波恢复问题,通过对数字Costas环原理的分析和仿真,在阐述FFT频率估计的基础上,提出了在Costas环中加入FFT模块进行辅助捕获载频的方法,从而加大了环路的捕获带宽。同时,利用MATLAB软件进行了仿真,进一步在Xilinx ISE13.3环境中,用Verilog语言对改进型环路进行了FPGA软件设计,给出了改进环路和FFT模块的RTL原理图,并对关键设计进行了说明,可知该环路将具有较好的实用性。
針對通信等領域中的接收耑載波恢複問題,通過對數字Costas環原理的分析和倣真,在闡述FFT頻率估計的基礎上,提齣瞭在Costas環中加入FFT模塊進行輔助捕穫載頻的方法,從而加大瞭環路的捕穫帶寬。同時,利用MATLAB軟件進行瞭倣真,進一步在Xilinx ISE13.3環境中,用Verilog語言對改進型環路進行瞭FPGA軟件設計,給齣瞭改進環路和FFT模塊的RTL原理圖,併對關鍵設計進行瞭說明,可知該環路將具有較好的實用性。
침대통신등영역중적접수단재파회복문제,통과대수자Costas배원리적분석화방진,재천술FFT빈솔고계적기출상,제출료재Costas배중가입FFT모괴진행보조포획재빈적방법,종이가대료배로적포획대관。동시,이용MATLAB연건진행료방진,진일보재Xilinx ISE13.3배경중,용Verilog어언대개진형배로진행료FPGA연건설계,급출료개진배로화FFT모괴적RTL원리도,병대관건설계진행료설명,가지해배로장구유교호적실용성。
Aimed at the recovery problems of receiving end in communications and other fields, through the analysis and simulation of the principle of digital Costas loop, the method of adding FFT model to Costas loop to capture carrier frequency is proposed based on expounding the estimation of FFT frequency. It can increase the capture bandwidth of loop. Meanwhile, MATLAB is used to simulate the research to improve loop software of FPGA in Xilinx ISE13.3 environment with Verilog language. The improved loop and FFT module RTL schematic are put forward, the key design is elaborated. It shows that the loop has better practicality.