Almost a year later this question comes up again, for a project
in which I am partly involved. In your comment you say:
"...from such a heart rate receiver...". Do you mean that there
already was (is) a receiver that you could add your solution to? 
So you didn't have to make the receiver as well?
If I've got you right, where can one get this receiver?

Regards,
PerL

----- Original Message ----- 
From: "Olin Lathrop" <olin_piclist@embedinc.com>
To: "Microcontroller discussion list - Public." <piclist@mit.edu>
Sent: Friday, November 26, 2004 11:16 PM
Subject: Re: [EE]5 kHz wireless


> Per Linne wrote:
>> I ask: I there really such a thing? (5 kHz wireless,  that is.)
> 
> Yes.  A common example of very low frequency "RF" are those heart rate
> monitors you strap around your chest that display on a wrist watch.  I once
> had to write PIC code to interpret the pulses from such a heart rate
> receiver and produce beats per minute.  It's not as easy as it sounds due to
> large amounts of ambient noise.  The algorithm ended up being rather
> complicated, but I did manage to get better response time and the same
> accuracy as the Polar (or was the Sports Intruments?) watch.
> 
> 
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