[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Signal at high speed (was: Re: [NSW] Guards & Mobile phones)

Subject: Re: Signal at high speed (was: Re: [NSW] Guards & Mobile phones)
From: Andrew Price <aprice@mail.dotcom.fr>
Date: Sat, 20 May 2000 08:13:31 +0200
Newsgroups: aus.rail,aus.comms.mobile
Organization: SWW
References: <06e393e5.6d89b7ac@usw-ex0108-063.remarq.com> <392527B9.9813E82E@ozemail.com.au> <3925315f$0$2632@news01.syd.optusnet.com.au> <1vaV4.896$465.891803@news0.optus.net.au> <39255156.FF2BF3D2@ozemail.com.au> <3925ef06$0$2635@news01.syd.optusnet.com.au> <WsnV4.421$lX1.524033@news0.optus.net.au> <XHoV4.38226$PL4.789494@ozemail.com.au>
Reply-To: andrew.price@free.fr
Xref: bclass.spectrum.com.au aus.rail:9582 aus.comms.mobile:5765

On Sat, 20 May 2000 14:46:04 +1000, "Chris Downs"
<cvdowns@ozemail.com.au> wrote:

>How significant is the Doppler effect in a train travelling at 83.3m/s
>(300km/h) compared with the speed of radio waves 300,000,000m/s (approx 1.1
>billion km/h)?
>
>Maybe the speed of moving from one base station to another and loss of
>signal strength has a greater effect?

I also suspect that this is the real cause of the problem.  In any
event, mobile phone performance from a TGV is very mediocre.

Follow-Ups:
- Re: Signal at high speed (was: Re: [NSW] Guards & Mobile phones)
  - From: "deano" <dsma@pigpond.com>

References:
- [NSW] Guards & Mobile phones
  - From: Nihonga <tony.patonNOtoSPAM@griffithhack.com.au.invalid>
- Re: [NSW] Guards & Mobile phones
  - From: Anita Lukaszyk <neety@ozemail.com.au>
- Re: [NSW] Guards & Mobile phones
  - From: "Andy B" <and_b@dingoblue.net.au>
- Re: [NSW] Guards & Mobile phones
  - From: "Dave Proctor" <daproc@spambait.ozemail.com.au>
- Signal at high speed (was: Re: [NSW] Guards & Mobile phones)
  - From: dbromage@fang.omni.com.au (David Bromage)
- Re: Signal at high speed (was: Re: [NSW] Guards & Mobile phones)
  - From: "Chris Downs" <cvdowns@ozemail.com.au>

Prev by Date: Re: info wanted re hist. NSW passenger services
Next by Date: Re: Any point looking OS??
Prev by thread: Re: Signal at high speed (was: Re: [NSW] Guards & Mobile phones)
Next by thread: Re: Signal at high speed (was: Re: [NSW] Guards & Mobile phones)
Index(es):
- Date
- Thread