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Dec_mul
时间同步后即可确定每帧数据的起始位置，这样就能完整的截取下每一帧。但是，数据中还带有频偏信息。在常规的通信系统中，多普勒很小仅仅会带来很小的频偏，但是在大多普勒的情况下，频偏将非常大，20马赫的速度将会带来将近34K的频偏。因此，如何很好的纠正频偏即为本系统的难点。
OFDM中，我们将大于子载波间隔倍数的频偏称为整数倍频偏，而将小于一个子载波间隔的频偏称为小数倍频偏。频偏矫正精度只要能保证小于十分之一倍的子载波间隔，频偏就不会对均衡和解调造成影响。本文中我们借鉴这种思想，由于硬件资源限制，我们将在接收端做64点FFT，即相当于将频域划分为64份，我们将小于 的频偏称为小数倍频偏，将 整数倍的频偏称为整数倍频偏。本程序即基于SCHIMDL经典方法完成小数倍频偏纠正(After time synchronization can determine the starting position of each frame data, so you can complete the interception of each frame. However, in the data with frequency information. In conventional communication systems, doppler small will bring only small deviation, but in the case of most of the doppler, frequency PianJiang is very large, 20 Mach speed will lead to deviation of nearly 34 k. Therefore, how to good to correct deviation is the difficulty of this system.
OFDM, we will be bigger than the sub-carrier spacing ratio of frequency deviation is called the integer frequency offset, and the interval will be less than a child carrier frequency offset is called decimal frequency doubling. Deviation is less than one over ten times as long as can guarantee accuracy of sub-carrier spacing, deviation will not affect balance and demodulation. This article, we draw lessons from the idea, due to the limited hardware resources, we will do 64 points FFT at the receiving end, which is equ)
- 2013-12-26 18:00:24下载
- 积分：1
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zuoye2
主要编写了一组二进制数据通过根升余弦滤波器后的波形，但并没有使用ISE内部的FIR滤波器内核，该程序相当于编写了一个根升余弦滤波器。(Mainly prepared a set of binary data through the root raised cosine filter waveform after, but did not use the ISE internal FIR filter kernel, the program is equivalent to the preparation of a root raised cosine filter.)
- 2013-09-18 15:24:13下载
- 积分：1
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基于VHDL数字频率计
基于vhdl可用的数字频率计，误差较小，精准度较高。文件中还包含了与arm的通信模块、
- 2022-03-05 17:19:11下载
- 积分：1
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dekoder
dekoder code s Gray to cod „ 1 from 16”. This is program i VHDL
- 2009-06-19 22:13:52下载
- 积分：1
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er
秒表 东北大学秦皇岛分校 电子设计自动化 实验(Stopwatch Northeastern University at Qinhuangdao electronic design automation experiment)
- 2012-06-27 02:25:14下载
- 积分：1
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Get-20-point
this program get 20 point from user and draw functions.
- 2014-01-09 03:25:06下载
- 积分：1
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LCD的Spartan3E FPGA VI
LCD SpartaN3E fpga vi
- 2022-01-29 03:37:34下载
- 积分：1
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xge_mac_latest.tar
Ethernet 10GE MAC 以太网10G的MAC Verilog代码实现(Ethernet 10GE MAC)
- 2010-07-31 10:04:20下载
- 积分：1
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用Matlab编写fft
在MATLAB下自编实现快速傅里叶分析，(Fast fft own procedures, faster than the system call fft slowe)
- 2020-06-23 09:00:02下载
- 积分：1
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DC-Voltmeter
Use this multimeter to make precise electronic measurements and tests. Easy-to-read LCD readout, positive set selector switch and 32" leads. AC voltage
- 2013-01-07 22:52:54下载
- 积分：1
