Just figured out what was wrong with my dot product calculation. I was multiplying two 16 bit integers together and they were rolling over. A simple cast to int32 and the problem was solved. Onward! Update: 4:14 PM Here’s and efficient implementation of the dot product that I wrote for the ARMv5E: ; void dot_product(int32 …
Category Archives: Uncategorized
12-03-2008
Now that IQ demodulation is working, it’s on to CORDIC. The trick is to try and get this done in a reasonable amount of time. If it’s not possible then I’ll have to explore other options for computing atan2. I only need accuracy to 0.1 degrees so that may help a bit. Update: 2:05 PM …
12-02-2008
Today I’m going to try and figure out why my FIR Filter doesn’t seem to work properly. I’m doing IQ Demodulation for a radio location system we’re developing but the output of my new FIR Filter looks really weird. Hopefully it’s just the taps for the filter that are wrong. I’ll update this post as …
Making My Own Space
So I’ve been trying to look for space for employees at Harbor Branch to blog at and have been frustrated. I wanted a work related site that people outside the institution can read to keep up to date with the latest engineering and research here but so far I’ve been out of luck. Since merging …
Lee and Alina’s Wedding
I’ve uploaded some quick picks I took during the wedding with my cell phone camera. Within a couple of weeks I’ll get the high quality photos but for now, here’s a preview: [album=3,extend]
Prescience with a capital P
I read this article from the fake news paper The Onion and laughed. Then I looked at the date and my jaw dropped.
New site!
Well I’m on a new server so it’s time for a brand new website! I’m adding the old content back but it’s a slow process. Stay tuned.