Open access signal processing journal? Signal processing is Elsevier, so it's not open access, and IEEE Transactions on Signal Processing is also not open access. I was wondering if there's any decent journal on par with those that's open access.

I'm trying to submit a paper on discrete time nonlinear filtering.

(there are no tags relating to publication/journal/conference please feel free to add tags or suggest different SE)
The EURASIP Journal on Advances in Signal Processing is a Springer journal with open access.  It sounds like the topic of your paper is appropriate for it.  The impact factor is not as high as IEEE Transactions on Signal Processing though.