Home Brew StarTrek Communicator

[Ian Stirling]

Emre Turkay wrote:
> On 6/12/07, Ian Stirling <OpenMoko at mauve.plus.com> wrote:
> 
>> Using really good coding, in good channel conditions, you may get 20
>> megabytes a second.
> 
> 
> Actually 10 MBits/sec = 1.25 MBytes/sec

Indeed.
However, in good channel conditions, you can squeeze extra bits into 
each signal period.
For example, '56K' modems put 7 bits into each signal period.

Common wifi implementations rarely use only one bit per signal period.
As the channel noise rises, the number of bits you can fit in to the 
signal period drops.
As an extreme case, for example, GPS has a 50 bits/second datarate, and 
a signal rate of 1Mhz.