# Peter K.

CT, USA

 3h comment How can this equation hold $$\sum_{m=0}^{N-1} \sum_{n=0}^{N-1} |u(m,n)|^2 = \sum_{k=0}^{N-1}\sum_{l=0}^{N-1} |v(k,l)|^2$$?Nope. My brain is fried for the day. Will have a look later, if I can. 3h comment How can this equation hold $$\sum_{m=0}^{N-1} \sum_{n=0}^{N-1} |u(m,n)|^2 = \sum_{k=0}^{N-1}\sum_{l=0}^{N-1} |v(k,l)|^2$$?Yup. That'd be Parseval, which would make sense.... Hmmm. Let me see if I can rejig the question to ask that. 3h comment How can this equation hold $$\sum_{m=0}^{N-1} \sum_{n=0}^{N-1} |u(m,n)|^2 = \sum_{k=0}^{N-1}\sum_{l=0}^{N-1} |v(k,l)|^2$$?@robertbristow-johnson : Could be! But $U$ and $V$ are explicitly called images... so they can't really be vectors, unless they're doing the Matlab U(:) operation... 4h comment Aliasing Square WaveThe $\color{blue}{blue}$ line is the sinusoid, the $\color{green}{green}$ line is the square wave. 4h reviewed Leave Closed How to pass FSK signal through two matched filters 4h comment How to pass FSK signal through two matched filtersYour edit doesn't help: you're still asking for code to be written to a specification. All you've done is narrowed down the specification. 5h comment Should I expect a receipt when giving a post-dated cheque?@brian Get off my lawn! ;-) 5h answered How can this equation hold $$\sum_{m=0}^{N-1} \sum_{n=0}^{N-1} |u(m,n)|^2 = \sum_{k=0}^{N-1}\sum_{l=0}^{N-1} |v(k,l)|^2$$? 6h comment Should I expect a receipt when giving a post-dated cheque?@brian You've never shopped at a supermarket, then? 6h revised How can this equation hold $$\sum_{m=0}^{N-1} \sum_{n=0}^{N-1} |u(m,n)|^2 = \sum_{k=0}^{N-1}\sum_{l=0}^{N-1} |v(k,l)|^2$$?edited title 6h answered Aliasing Square Wave 8h comment Time series classification of the tracking dataWelcome to DSP.SE! That's an interesting application, but I can't find a question in what you write. Can you please edit your question and add, er, a clear question that we can answer? 9h revised How to pass FSK signal through two matched filtersFormatting changes only 9h reviewed Leave Closed converting 1D signal to 2D 9h reviewed Reviewed noises are continuous or discrete in nature? what are the types of statistical noise? and why it is called as statistic noise? 9h comment noises are continuous or discrete in nature? what are the types of statistical noise? and why it is called as statistic noise?The link also mentions shot noise. And those are just EXAMPLES, they are not meant to be an exhaustive list. What are you trying to ask? 9h revised Time series classification of the tracking dataFormatting and link inlining only 9h comment How to calibrate two microphones to same frequency rangeHistogram doesn't. That's why I said to ignore those results. 10h comment Unusual real estate market with seemingly huge rental returnsThe Australian property market is a bit of an outlier, compared with places like the US and Ireland which have experienced property crashes in the last decade. 10h revised How can this equation hold $$\sum_{m=0}^{N-1} \sum_{n=0}^{N-1} |u(m,n)|^2 = \sum_{k=0}^{N-1}\sum_{l=0}^{N-1} |v(k,l)|^2$$?Minor formatting changes