据说fcc更改了cr的频谱感知和避让规则

sensing is not required, rely on Geo database

原来是怎么要求的？
我记得原来好像就是只要在一定时间内（2s，好象是）发现注册用户就可以了，也不需要
实时啊。

这个是在哪看到的？

我看了一下那个文档，pickup interference是什么意思？
谢谢。

在哪里啊，共享一下

http://hraunfoss.fcc.gov/edocs_public/attachmatch/DOC-301650A1.pdf

TVWS R&O Changes:
1.  Sensing is NOT required of TVBDs which have access to the FCC TVWS dbase.
2.  Sensing only terminal is reserved as a future option and FCC encourages
        continued DOD research and commercialization of sensing technologies.
3.  Two  TV channels will be reserved nationwide (not clear if it will be same 2 channels in
        all markets) for protected wireless microphones.
4.  Incumbents needing more than 2 TV channels in any market for special events and
        sports venues will be able to register for and reserve additional TV channels for
        wireless microphone use for these special events.  These additional reservations
        will be included in and protected by the FCC TVWS dbase.
5.  The Canada and Mexico border exclusion zone (upto 60Km wide) is being scrapped.
        Instead of blacking out TVWS use at borders, the FCC dbase will include and list
        protected Canadian and Mexican stations near US borders. These foreign incumbent
        stations will be protected by the same FCC dbase mechanisms protecting US incumbents.
6.  New initiative coming soon to provide licensed use of TV band for RURAL broadband backhaul.
        (Not clear if this will follow the Canada low-cost licensed model, the auction model, or something else.)
7.  Knapp noted that he expects and hopes that the FCC can conclude on and award the TVWS Dbase manager
        contracts in the "next few months."  Undoubtedly, the decision to list Canadian and
        Mexican incumbents will have some impact here.

主要就是从复杂的分布式感知，转变为集中管理认证，工程上方便实现，也方便FCC和国会以及TV Broadcast的势力争论。