Bright Spark or Spark Gap?
Napoleon and the Mathematician
Before going any further we need to take a brief side-step and remember Jean Baptiste Joseph Fourier (1768-1830), one time governor of Lower Egypt under Napoleon and master mathematician. Fourier developed an equation (the Fourier Transform), which allows us to tr
According to an article in yesterday's London 'Metro' newspaper, experts from the highly respected Massachusetts Institute of Technology (MIT) have spent about US$200,000 showing that aluminium hats, similar to those worn by Mel Gibson in the film 'Signs' serve to reduce rad
CDMA: How does that work then?
CDMA - Code Division Multiple Access - is probably one of the most complex methods for accessing the radio spectrum that is in use today. Let's first take a look at the easier to understand methods to see what the differences are.
FDMA - Frequency Division Multiple Access - is a sys
Radio No Man's Land
Look at any Frequency Allocation Table (FAT) whether it's the ITU's radio regulations or a national one and there are lots of places where the use of the spectrum changes from one type to another (for example from mobile to fixed links). But what actually happens at the place where the tr
A lot has been made in the British press recently of a test which is being introduced by the Home Office to assess immigrants' knowledge of Britain - the 'Britishness Test'. Amongst the many peculiar questions raised in the test, newspapers and television channels alike have reported
Any illegal radio transmission runs the risk of being tracked down by the relevant authorities who use sophisticated equipment to monitor the spectrum for unlicensed transmissions. Such equipment is capable of pin-pointing the location of a given transmitter to within a few hundred metres in under
- Bright Spark or Spark Gap?