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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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CPU的VHDL设计代码
应用背景VHDL ；CPU设计...................................................................................................................................................................................................................................................................................................................................................................关键技术VHDL ；CPU设计...................................................................................................................................
- 2022-05-20 23:07:58下载
- 积分：1
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一个用FPGA语言设计数字秒表的程序，有相关的源程序和说明
一个用FPGA语言设计数字秒表的程序，有相关的源程序和说明-FPGA design using a digital stopwatch language of the procedures and instructions related to the source
- 2022-02-02 02:15:47下载
- 积分：1
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this come from alter ,you can look and find it on line.
this come from alter ,you can look and find it on line.
- 2022-12-12 10:20:03下载
- 积分：1
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cic_compensating
CIC 补偿滤波器。采用两种方法来设计，一个是frequency sampling method。另一个是Equal Rippler Design Method。这是一个非常有用的matlab代码。(CIC compensation filter. Two ways to design a frequency sampling method. The other is an Equal Rippler Design Method. This is a very useful matlab code.)
- 2012-10-17 14:22:08下载
- 积分：1
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这是改变，你可以找到它在网上视频。
this come from alter ,you can look and find it on line about h263.
- 2022-03-26 07:28:30下载
- 积分：1
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SimpleSpi
master spi的源代码（verilog），包括文档，测试程序(master spi the source code (verilog), including documentation, testing procedures)
- 2007-01-29 21:03:51下载
- 积分：1
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design-of-CAN-based-on-VHDL
基于Verilog+HDL设计CAN控制器,详细介绍各功能模块的设计。本论文的重点是CAN总线通信控制器的前端设计。即用Verilog HDL语言完成CAN协议的数据链路层的RTL级设计，实现其功能，并且能够在FPGA开发平台Quartos上通过仿真验证，证明其正确性(Verilog+ HDL-based design of CAN controller, detailed design of each functional module. This paper focuses on the CAN bus communication controller front-end design. Verilog HDL language that is used to complete the data link layer CAN protocol the RTL-level design, to achieve its function, and can be on the FPGA development platform Quartos by simulation to prove its correctness)
- 2011-07-22 15:22:27下载
- 积分：1
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VHDL-Keyboard
设计制作一个检测4*4矩阵键盘的按键编码的实验，把实际按键的键值的八位编码先转换成从0000—1111的编码，再译成数码管能识别的八位编码，在数码管动态显示时，4*4矩阵键盘的第一行对应00—03，第二行对应04—07，第三行08—11，第四行对应12—15。(Design a 4* 4 matrix keyboard key coding experiments to detect the key the actual key octet coded first convert from 0000-1111 encoding, and then translated into digital tube to identify the eight coding, digital tube dynamic display, the first line of the 4* 4 matrix keyboard corresponding to 00-03, the second line corresponds to 04-07, the third line of 08-11, the fourth line corresponds to 12-15.)
- 2012-07-01 10:02:33下载
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用VHDL硬件描述语言开发的miniUART接口IP Core,用户可以将其嵌入到自己的FPGA模块中。...
用VHDL硬件描述语言开发的miniUART接口IP Core,用户可以将其嵌入到自己的FPGA模块中。-VHDL hardware description language developed by miniUART Interface IP Core, Users can be embedded into their own FPGA module.
- 2022-10-05 02:20:03下载
- 积分：1
