Here is a link to the frequency allocation chart that I like to reference.: http://www.ntia.doc.gov/osmhome/allochrt.pdf Keep in mind, the veritcal scale is log. The amount of bandwidth in Hz of a given block increases rapidly as you go down the chart. You'll see the typical mobile wireless bands at 800-900 MHz, 1.9-2.4 GHz, and scattered throughout the higher bands. Also, to lowest part of the chart isn't a very usable set of frequencies. The channel characteristics aren't very desirable. I'm aware of a few proposals "on the table" to reorganize the allocation. I'm sure more reliable information can be found on the FCC's web site. The spectrum simply *MUST* be managed, and it must evolve. I do not envy those who must make the _informed_ decisions on how it's done. Hz for Hz, broadcast services aren't taking up much space at all. Brad
Ben McCafferty wrote: >Recently read an interesting article on the use of wireless bandwidth in the >US, and it's pretty crazy. For interested parties, it was in Forbes >(http://www.forbes.com/forbes/2002/1125/138.html and you need to register to >access the article). Basically, the FCC has a stranglehold on frequencies, >and are still letting archaic technologies have the airwaves here. For >example, one of the largest usable segments is consumed for broadcast TV (11 >million users), though 88% of the country's viewers use cable or satellite. >Meanwhile, tremendous cell traffic (137 million users) is being forced into >a segment of frequencies half as large as broadcast TV enjoys, which is >really the reason we have such poor cell service in the US. Very >interesting article re: fat cat-ism, etc. >bmc :) >Ben McCafferty >ben@volkscafe.com > >Volks Cafe >1823 Soquel Avenue >Santa Cruz, CA 95062 >831-426-1244 >http://www.volkscafe.com > > > > >>From: David Brodbeck <gull@CYBERSPACE.ORG> >>Reply-To: David Brodbeck <gull@CYBERSPACE.ORG> >>Date: Fri, 17 Jan 2003 11:00:58 -0500 >>To: vanagon@GERRY.VANAGON.COM >>Subject: Re: Fast German will fix the broken rebuild / Fix? >> >>On Fri, 17 Jan 2003, David Beierl wrote: >> >> >> >>>At 02:37 AM 1/17/2003, zampano wrote: >>> >>> >>>>How come cell phones still are horribly >>>>unreliable all over the U.S?? When I could use them in Italy, >>>>Switzerland and Germany 8 years ago on mountain peaks, valleys, subway >>>>stations, anywhere except tunnels??? >>>> >>>> >>>Have you compared the sizes? Germany for example, has a helicopter/trauma >>>center setup that can get people to a trauma center from anywhere in the >>>country in fifteen minutes. This is great, but they have only about >>>one-eighth the land mass per inhabitant (230/km^2 vs 27/km^2 ten or fifteen >>>years ago) >>> >>> >>That's part of it, but another major difference is that Europe >>standardized on one digital cell phone standard. In the U.S., there >>wasn't the political will to do this, so we have three completely >>incompatible phone networks. For everyone to get reliable service the >>whole country has to be covered in triplicate! This is one case where a >>little more government intervention would have benefited everyone. >> >>_ _ >>__ _ _ _| | | | David M. Brodbeck (N8SRE) Ypsilanti, MI >>/ _` | | | | | | +----------------------------------------------------- >>| (_| | |_| | | | @ cyberspace.org >>\__, |\__,_|_|_| "To the optimist, the glass is half full. To the >>|___/ pessimist, the glass is half empty. To the engineer, >>the glass is twice as big as it needs to be." >> >> > > > |
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