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Removing DC and low frequency noise from a spectrum

Started by tomb18 7 years ago21 replieslatest reply 4 months ago2111 views
In a previous post, I asked about removing a DC spike from a spectrum generated by a quadrature receiver.  I have been able to remove the DC spike but the spike...

Rabbit Ear Artifact At Image Frequency of Complex Downconverted Pulse Train

Started by JohnnyM 6 months ago5 replieslatest reply 5 months ago141 views
Hello, I have created a Matlab simulation of a series of band-limited sinusoidal pulses indexed 1:N, spaced evenly in "slow time" each with a starting phase that...
Thank you for reading this in advanceI approximated an FIR filter to an IIR filter using the balanced model truncation method.After this, I have got very similar...

PDM to PCM

Started by D3dalo 5 months ago2 replieslatest reply 5 months ago163 views
Hi, I have a PDM signal and I wanna convert it to a PCM signal. This signal is sample at 1MHz. This is the process that I am following:Filter the signal with a FIR...

'Alchemical' Forecasting and Restorative Up-Sampling

Started by Winkie 1 year ago10 replieslatest reply 5 months ago171 views
Dear DSPRelated friends:It's been a number of months since I prematurely tried your patience with ideas so far 'out-of-the-box' that I could be paying you for therapy...

IIR filters

Started by neirober 6 years ago14 replieslatest reply 6 months ago612 views
I am curious about the usefulness of IIR filters above 2nd order in DSP applications.  I know that first order IIR's are common, and presumably so are biquads. ...

Recent SPAM posts in the Forums

Started by stephaneb 7 months ago229 views
Hello, just a quick note to let you know that we are fully aware of the spam posts that made it into this forum lately, despite our spam filtering system.  The...

GNURadio BPSK Position Costas Loop and Clocksync

Started by RonWei 6 months ago6 replieslatest reply 6 months ago336 views
Hello folks,I'm having a problem understanding GNU Radio and the BPSK examples right now.In all examples in the www, a clock sync block is used first after reading...

Calculating optimal loop point in audio sample

Started by smjedison 7 months ago10 replieslatest reply 6 months ago158 views
(Disclaimer, I'm self-taught and mostly a beginner when it comes to DSP) Hi! I've recently been working on a problem to find the optimal loop point in an audio...

mitigating phase shift

Started by Detlef _A 6 months ago5 replieslatest reply 6 months ago147 views
Hi, I want to PLL on the line voltage, here in Europe 50Hz. I have a noisy signal and i use a prefilter with a complex pole pair at 0.999*exp(+/- j*2*pi*50/10000)....

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