Comments on: Helicopter to block mobile calls in Sydney http://www.mobileindustryreview.com/2007/05/helicopter_to_block_mobile_calls_in_sydney.html Daily news and opinion for 250,000 industry executives and mobile fanatics Wed, 15 Feb 2012 15:14:00 +0100 hourly 1 http://wordpress.org/?v=3.3.1 By: Mike http://www.mobileindustryreview.com/2007/05/helicopter_to_block_mobile_calls_in_sydney.html/comment-page-1#comment-52517 Mike Mon, 21 May 2007 10:38:41 +0000 http://www.smstextnews.com/2007/05/helicopter_to_block_mobile_calls_in_sydney.html#comment-52517 Or, conversely, that the terrorists would do a spectral analysis of the jamming interferance being used (wideband noise between approx. 800MHz-1GHz, 1.8-1.9GHz and 2-2.2GHz would do it) or possibly targetting the GSM/TDMA control/paging chanels to prevent calls being made/received - ahhh, but in CDMA/WCDMA systems the control/paging channel is a 'virtual' channel amongst all the others with its unique orthogonal code (codes, not channels sparate CDMA system calls, so can't pick that one out) So instead, you just set your bomb to detonate or gas canister to vent when a decent amount of wideband noise was detected. Much cheaper/easier to do. Or, install a 'prat in an SUV' detector. Or, conversely, that the terrorists would do a spectral analysis of the jamming interferance being used (wideband noise between approx. 800MHz-1GHz, 1.8-1.9GHz and 2-2.2GHz would do it) or possibly targetting the GSM/TDMA control/paging chanels to prevent calls being made/received – ahhh, but in CDMA/WCDMA systems the control/paging channel is a ‘virtual’ channel amongst all the others with its unique orthogonal code (codes, not channels sparate CDMA system calls, so can’t pick that one out)

So instead, you just set your bomb to detonate or gas canister to vent when a decent amount of wideband noise was detected. Much cheaper/easier to do.

Or, install a ‘prat in an SUV’ detector.

]]> By: Dan Lane http://www.mobileindustryreview.com/2007/05/helicopter_to_block_mobile_calls_in_sydney.html/comment-page-1#comment-51991 Dan Lane Sat, 19 May 2007 10:01:41 +0000 http://www.smstextnews.com/2007/05/helicopter_to_block_mobile_calls_in_sydney.html#comment-51991 What a load of rubbish, by announcing it to the world they are simply advising any would-be assassins that cellphones aren't a viable method of detonation and to use something else. What they are really saying is that George Bush is more important than your phone calls. George Bush is more important than your ability to call the emergency services. I, personally, disagree. What a load of rubbish, by announcing it to the world they are simply advising any would-be assassins that cellphones aren’t a viable method of detonation and to use something else.

What they are really saying is that George Bush is more important than your phone calls.

George Bush is more important than your ability to call the emergency services.

I, personally, disagree.

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