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Registered Member #2939
Joined: Fri Jun 25 2010, 04:25AM
Location:
Posts: 615
He build the RF frontend out of (mostly) discrete parts. Not quite the same as building a whole GPS receiver in discretes. Still - credit for the effort.
Registered Member #49
Joined: Thu Feb 09 2006, 04:05AM
Location: Bigass Pile of Penguins
Posts: 362
That was disappointing...
Computational "heavy-lifting" such as FFT-based search and solving for user position are performed by the PC.
I thought he implemented THAT with discretes! LOL.
I had a homework assignment once to write a GPS algorithm in matlab - a file of raw antenna data was provided and the assignment was to write a search algorithm and calculate position. Until you've tried it is hard to grasp the computing power required. My implementation was far from efficient but even the satellite search that can be accomplished in seconds by a commercial receiver takes a lot oomph.
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Homemade GPS Receiver
