HPSDR

ve6vq's picture

HPSDR Comes to Professional Radio Astronomy

Some people at UC Berkeley have been doing some interesting work with SDR that kind of mirrors what's been going on in the amateur SDR community: They have concluded that building custom systems takes too long and costs too much money, so they've started using the same kinds of components and techniques that the amateur HPSDR community is using.  Check their web site at https://casper.berkeley.edu/

As an example of the kind of things they are doing, consider a 44 receiver array with beamforming and correlation centered at ~1400 MHz with a 200 MHz bandwidth! This takes a _lot_ of processing power, but the compared with what can be done with a single receiver, the contrast is dramatic. To me, this validates the approach of using high-speed direct ADCs and large FPGAs performing the DSP "heavy lifting". I also notice that they are using the Polyphase FFT filtering being championed by Frank Brickle and Robert McGwier for the AMSAT DttSP project.

https://casper.berkeley.edu/presentations/poster_ursi_flyseye_2008.pdf

n7ipb's picture

OpenHPSDR Project update.

Scotty Cowling, WA2DFI gives an update on the current state of the various OpenHPSDR projects.

For those not familiar with HPSDR checkout http://openhpsdr.org for details.

n7ipb's picture

2010 ARRL and TAPR Digital Communications Conference

This weekend is the annual ARRL/TAPR DCC and it happens to be close enough (Vancouver,WA) that a contingent of WETNET folk are attending.

SIx of us came down on Amtrak Thursday evening and we'll be posting pictures all weeking.  I might even find time to post a few articles as well

 IMG_20100924_084353.jpg

More pictures at http://wetnet.net/gallery/v/wetnet_users/n7ipb/DCC_2010/

Check often for updates throughout the weekend and/or join us on jabber.wetnet.net in the dcc conference

Ken, N7IPB

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