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VHDL-the-count
利用VHDL 硬件描述语言设计一个0~9999 的加法计数器。根据一定频率的触发
时钟,计数器进行加计数,并利用数码管进行显示,当计数到9999 时,从0 开始重新计数(Use of VHDL hardware description language design a 0 ~ 9999 addition counter. According to a certain frequency of the trigger
The clock, counter add count, and use digital pipes to show that when the count to 9999, starting from 0 to count
)
- 2012-01-13 14:01:38下载
- 积分:1
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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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sapis
SAPIS doc : SATA interface
- 2017-07-16 15:59:06下载
- 积分:1
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dspafpga
dsp与fpga通信的verilog程序,强烈推荐欢迎参考(dsp and fpga verilog communication program, it is strongly recommended to welcome reference)
- 2020-12-04 15:59:23下载
- 积分:1
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Verilog-shift-mulfunction
FPGA verilog 实现任意位宽的移位相乘法,有符号小数或者有符号整数相乘。函数调用方式(FPGA verilog achieve any bit-wide shift multiplication , signed or signed decimal integer multiplication . Function call
)
- 2014-06-21 17:08:12下载
- 积分:1
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regress-900055
The Date prototype object is itself a Date object (its [[Class]] is "Date") whose value is NaN.
- 2013-12-27 00:29:58下载
- 积分:1
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RS_5_3_CODEC
完成RS(5,3)编码程序,运用Verilog语言。(Complete the RS (5,3) coding process, the use of Verilog language.)
- 2010-05-25 21:21:34下载
- 积分:1
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encoder_Z64_all_rate
Wimax矩阵的LDPC编码器,已通过modelsim仿真测试,并前在altera的FPGA板上通过测试,码率5/6,可进入代码内部修改参数,支持2/3,3/4其他2个码率,数据吞吐量为700M(Wimax based LDPC encoder, modelsim simulation passed, also passed on altera FPGA board, code rate 5/6, also support 2/3,3/4, throughout 700m)
- 2012-03-19 09:44:32下载
- 积分:1
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黑金Alinx开发板DDR2读写控制器
应用背景该工程为黑金Alinx开发板配套项目,实现了实时视频采集与处理,代码架构完整清晰,非常适合视频处理算法的移植。关键技术该工程主要完成PAL制视频BT656格式的解码,视频数据DDR2存取,双线性插值放大及VGA输出,值得希望学习Altera ddr2 ip的同学参考借鉴~
- 2022-04-28 23:42:59下载
- 积分:1
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跨时钟域的异步fifo设计
跨时钟域的异步fifo设计设计一个FIFO是ASIC设计者遇到的最普遍的问题之一。本文着重介绍怎样设计FIFO——这是一个看似简单却很复杂的任务。 一开始,要注意,FIFO通常用于时钟域的过渡,是双时钟设计。换句话说,设计工程要处理(work off)两个时钟,因此在大多数情况下,FIFO工作于独立的两个时钟之间。然而,我们不从这样的结构开始介绍—我们将从工作在单时钟的一个FIFO特例开始。虽然工作在同一时钟的FIFO在实际应用中很少用到,但它为更多的复杂设计搭建一个平台,这是非常有用的
- 2022-03-07 13:16:39下载
- 积分:1