 |
|||||||
|
|||||||
|
|
|||||||
|
|||||||
|
|
| ltc3835eufd资料 | |
|
ltc3835eufd |
|
file size : 116 kb
manufacturer:linear description:dmt signal a dmt signal is basically the sum of n inde- pendently qam modulated signals, each carried over a distinct carrier. the frequency separation of each carrier is 4.3125khz with a total number of 256 carriers (ansi). for n large, the signal can be modelled by a gaussian process with a certain amplitude probability density function. since the maximum amplitude is expected to arise very rarely, we decide to clip the signal and to trade- off the resulting snr loss against ad/da dy- namic. a clipping factor (vpeak/vrms = crest fac- tor) of 5 will be used resulting in a maximum snr of 75db. adsl dmt signals are nominally sent at -40dbm/hz 3db (-3.65dbm/carrier) with a maximal power of 100mw for down link transmitter and 15.7mw for uplink transmitter. dmt symbols are transmitted without window- ing causing sin (x)/x like sidelobes. for spectral response shaping, the 1st sidelobe level is as- sumed to be 13db under the carrier level with an attenuation of -20db/dec. the minimum snr d neede d for dmt carrier demodulation is about (3 ⋅ n 20) db with a minimum of 38db were n is the constellation size of a carrier (in bits). |
|
| 1pcs | 100pcs | 1k | 10k | ||
|
型 号：ltc3835eufd 厂 家：linear 封 装：0529 批 号：smd 数 量：2998 说 明： |
|||||
|
运 费： 所在地： 新旧程度： |
|||||
| 联系人：林浩/林妮 |
| 电 话：0755-82532799/82532766/83989559 |
| 手 机：13510168121/13725556003 |
| qq：496982847/351622092 |
| msn：linearic@hotmail.com |
| 传 真：0755-82532766 |
| email：maxim_zi@126.com |
| 公司地址： 深圳市福田区佳和大厦b座1802室 门市部：华强广场 q2a114展销柜 |
凯发vip的版权所有：深圳市浩兴电子有限公司凯发vip的版权所有 凯发vip的技术支持：维库电子市场网
访问统计：
建议使用分辨率:1024*768 凯发在线网站的友情链接
后台管理
