Robert Morein wrote:
"ScottW" wrote in message
oups.com...


Robert Morein wrote:
There really isn't.
It is a common misconception that a station is not received due to
inadequate signal strength. This is actually quite rare.
The usual problem is a combination of:
1. multipath, meaning that the signal reaches the antenna via multiple
reflections. This causes complete cancellation at specific frequencies
as
the modulated FM signal changes frequency. No antenna can restore a
signal
from a null.

Funny that cell phones can but expensive FM receivers can't.

http://www.answers.com/topic/rake-receiver

ScottW

That is because cell is spread-spectrum:
http://www.maxim-ic.com/appnotes.cfm...te_number/1890
A broadband signal cannot experience complete phase cancellation. Only parts
of the signal will vanish. There are two newer methods that specifically aim
at reduction of multipath effects: OFDM, and time-space diversity reception.

I know... just kind of pointing out in a convoluted way how obsolete
FM is. We get trapped in these legacy technologies and until something
like the gov dicates a change (like digital television for example)
people will continue struggling with problems that have long been
solved.

ScottW