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BCJR algorithm needs noise variance for Gamma (branch metrices) calculation. So I am wondering does SOVA (soft output Viterbi algorithm) needs noise variance?

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Based on Nyquist sampling theorem, sampling would have a convolution in frequency domain, and reasonably the bandwidth of each convolution would be as that of the original signal. Nevertheless, the discrete time Fourier transform of a signal ,which has been downsampled , has the $M$ multiples bandwidth of each convolution.($M$ is the downsample factor). I could not have got the idea, what is the true relation between time/frequency domain with underlying discrete time Fourier transform? Sampling gets convolution in frequency domain: Downsampling gets more wider bandwidth:

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I have been trying to use spread spectrum technique for audio steganography. I read a lot about it. But i didn't find any information about the steganography scheme using FHSS(frequency hopping spread spectrum). Isn't it possible to do steganography in .wav files using FHSS?

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I want to open a port on my router so that a feedprovider can push their data into my PC. I can open the port on my router with portforwarding, although then the whole Internet can access my port. I want to make the port visible only to my feed provider. For that reason I need a router which can set a specific rule to make the port only visible to the feed provider. Does someone know a router which can do this? Thanks!

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I've been looking for wireless earbuds, just like the Apple model. Personally, I don't like the ones that you introduce in the ear. And not like all the other in-ear that fill the market: Any suggestion ?

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This question already has an answer here: Are Career-Advice Questions On-Topic Here? 1 answer Why can't I ask a question about career progression? I posted a question last night and the question has been removed! I am a little shocked as to why I can't ask a question here? Is it because it's an opinion based and not a factual question?? If that's the case can someone please give me a factual answer as to where I can ask a question to someone who works in software development so I can get an actual answer please!

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As far as I understand this question, the OP is not asking literally where to store the event data, or which tool or database to use for, but how to do this. And that is obviously a conceptual question, which is IMHO within in the site's scope. Ok, the question misses to tell us what the OP already has tried or found so far, and some background about the environment he uses, but I guess this does not make the question so bad it deserves an immediate closing.

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I am currently waiting to hear back from grad schools in economics. I hope that I will be accepted somewhere, but I have a feeling that I am going to get rejected from everywhere that I applied. I am about to obtain a Masters in Statistics from a top 30 statistics program, while taking all of the coursework needed for a doctorate (including courses in measure theory and measure-theoretic probability). I thought that the admissions committees might like this, as I want to pursue graduate research in econometrics; however, I don't think they really care.

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I’m not sure if this is typically done, but suppose my data point is in 2013 JPY and I want to express in 2016 USD. Do I apply CPI to express data in 2016 JPY, and then apply exchange rate to 2016 USD? Or do I apply exchange rate to obtain 2013 USD first, then apply CPI to bring forward to 2016 USD? Or is this all redundant?

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My (admittedly very limited) understanding is that free trade is seen by most academics and legislatures in the West as an ideal to strive for. The theory is that if a man in China can manufacture a ceramic cup cheaper than a man in Stoke-on-Trent then the UK government should not protect the Stoke man from the competition. In any way (AFAICT). The reasoning being that the UK buyers of ceramic cups will benefit from the lower cost of the good from China and presumably that the market remains more efficient. The societal costs of this approach can be huge. For example, unemployment, lower wages and all the pathologies that are concomitant.

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