RE: WLANAHello jkay- That article is exactly what I was
referring to. In fact ( ido not have the URL with me) EE Times did a feature in their communications
focus in the August 16 publication which talks about software radio. Also the last edition of
WIRED magazine has an interview with the CEO of
Nokia about software radio.
As for interfernce, there is plenty of interfence
at 2.4 GHZ (Microwave ovens, cordless phones etc).
Bluetooth has got around this by using and extremely agressice hopping scheme (where they
send data/voice on one frequency and then hop to another, then to another very quickly within
the 2.4 GHZ band. By hopping you lower the odds that your transmission will be effected by interfernce lingering on any given frequency).
Another or sumplementary scheme is to also emply
forwrd error correction , rendundancy etc.
I am just starting to get my head around OFDM
however with the new DSPs etc available people
can implement very clever error correction.
From what I know about OFDM it appears very robust
something I haven't seen since the days of
the old HF MIL STD 1048 modems. With data rates so high OFDM could in theory afford to employ
forward error correction and redundancy in poor
channel condidtions without having to slow down
significantly (just a guess)
So by adding powerful coding on top of software radio based front ends the future looks interesting.
PS: Unfortunately the worst cause of interference for Wireless LAn will be Bluetooth. TBD
Regards