在线咨询
eetop公众号 创芯大讲堂 创芯人才网
切换到宽版

EETOP 创芯网论坛 (原名:电子顶级开发网)

手机号码,快捷登录

手机号码,快捷登录

找回密码

  登录   注册  

快捷导航
搜帖子
芯片精品文章合集(500篇!) 创芯人才网--重磅上线啦!
查看: 3102|回复: 3

[原创] FFT是用DSP还是FPGA

[复制链接]
发表于 2006-5-25 01:28:44 | 显示全部楼层 |阅读模式

马上注册,结交更多好友,享用更多功能,让你轻松玩转社区。

您需要 登录 才可以下载或查看,没有账号?注册

x
本帖最后由 cjsb37 于 2013-4-29 09:29 编辑

[这个贴子最后由haichao在 2006/05/25 01:32am 第 2 次编辑]

Q:
I am trying to compare the Pros and Cons for the implemetation of FFT using DSP or FPGA. For DSP, I would like to us TI's chip; For FPGA I would like to use Xilinx's chip. I think both of them are able to complete a 128 pt or 256 pt fix point FFT. What I don't know are the price, speed and any other concern.
A:
An n-point FFT requires something on the order of n*log(n) multiplies and adds. Figure that the TI chip is going to require something on the order of 5-20 clock ticks * n * log_2(n) to get it done. An FPGA will do whatever you design it for, with a _BIG_ tradeoff between speed, logic utilization, and engineering time -- e.g. with a big enough FPGA you could do an n-point FFT in log_2(n) steps, but it'd have to have 2n multipliers to do it.








发表于 2006-7-3 10:44:06 | 显示全部楼层
感觉用FPGA好
发表于 2006-7-6 09:46:50 | 显示全部楼层
DSP好撒,更显专业。FPGA不擅长做乘法吧?
头像被屏蔽
发表于 2007-3-2 20:40:25 | 显示全部楼层
提示: 作者被禁止或删除 内容自动屏蔽
您需要登录后才可以回帖 登录 | 注册

本版积分规则

关闭

站长推荐 上一条 /2 下一条


小黑屋| 手机版| 关于我们| 联系我们| 在线咨询| 隐私声明| EETOP 创芯网
( 京ICP备:10050787号 京公网安备:11010502037710 )

GMT+8, 2024-11-24 14:42 , Processed in 0.019892 second(s), 9 queries , Gzip On, Redis On.

eetop公众号 创芯大讲堂 创芯人才网
快速回复 返回顶部 返回列表