(@sachinwannabe)
Hi, If you need to vary the fractional delay real-time, farrow resampler is a good choice. If you can afford to recompute the coefficients for each different fractional...
Hi Sumit,The rotation of the constellation looks like a classic phase shift. Since your frequency source is between TX and RX is the same (and hence in sync), it...
Everyone,Thanks for your replies.My fundamental confusion was how to reconcile with the "additional" bandwidth that comes the I/Q conversion - the mixer is bit of...
Hello,So I am struggling with a fundamental Nyquist bandwidth question. My SOC consists of a high-speed ADC followed by a complex mixer (with optional decimation).Say...
I would try the following:1. Run only the analysis-synthesis filters (remove FFT-IFFT). If you get perfect replica, you know the filters are not the reason.2. Remember,...
Are you doing your unpacking of the 4-sample frame correctly, so that the most recent sample is multiplied by h[0] and so on. It is easy to get the order reversed,...
Conceptually doesn't seem right (not saying it isn't). I know 1Gsps real data can be represented as 500Msps complex data - but that makes intuitive sense since its...
Hi,A very basic question related to real to complex conversion. Let's say I have a ADC sampling at 1Gsps - real samples only. In the digital domain (FPGA), I want...
Thanks acheshir that helps. I realized that thinking in exponential notation also makes this obvious - I was trying to visualize the overlaying of sinusoids which...
Hi Jw,I was thinking along those lines too, but that doesn't line up with the constant correlation I get in software (and as said by dudelsound). I suppose for complex...
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