### Andres Monterrosas (@dres)

I graduated with a BSEE in 2016 and now work as a communications engineer. I received my MSEE in 2019. I am interested in software-defined radio.

## Re: How to separate these orthogonal inputs

Let's take this back to linear algebra basics. Suppose we have two orthonormal vectors x and y. Then we form the vector z = ax + by, where a and b are complex...

## Re: How to separate these orthogonal inputs

For LTE SRS, there are 8* possible cyclic shifts, which means the SRS are orthogonal over sub-lengths of 8 subcarriers. So for separating overlapping SRS's out for...

## Re: Band Edge Detector dervied from Maximum Liklihood Principle?

A detailed derivation from ML first principles can be found in the book Synchronization Techniques for Digital Receivers by Mengali and D'Andrea. Specifically, sections...

## Re: Timing Recovery Loop Filter Rate

That is fascinating! Thanks for sharing. I wish I knew more people like you with the experience and knowledge of these "industry" designs and clever tricks that...

## Re: Discrete Wavelet Transform (DWT) Filter Bank question

Yes, the taps are the same. Perhaps what is meant by "new" is that it runs at a different rate, and so has a different bandwidth (half) relative to the original input...

## Timing Recovery Loop Filter Rate

Many symbol timing control loop structures consist of TED -> loop filter - >NCO -> Interpolation. The TED is updated once per symbol, but the NCO is driven...

## Re: Magnitude of frequency components

So what is your goal then? To estimate the parameters of your harmonics, to rid your signal of your harmonics, or to suppress the leakage effects of your harmonics?...

...

## Re: Generating Bandlimited Noise

The comment you linked is correct and is in agreement with what I said. The model we have for AWGN (whether Johnson or otherwise) is that it has a flat spectral...

## Re: Generating Bandlimited Noise

Johnson noise is just one of the many sources of AWGN, and it is no different than AWGN. It has a flat spectral density just like AWGN (technically at extremely...

## Estimating SNR without windowing

I've come across several wonderful algorithms for estimating the parameters of a complex tone in noise (ex. Macleod, Jacobsen, Flat Top window, etc), that I've simulated...

Use this form to contact dres

Before you can contact a member of the *Related Sites:

• You must be logged in (register here)
• You must confirm you email address