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autocorrelation using the Wiener–Khinchin theorem for iOS/OSX.

The implementation will use the methods for FFT and IFFT provided by the Accelerate Framework, and be as optimised as possible for performance in iOS devices.

The implementation will be a single Objective-C class with a single method. This method will take as input a pointer to a float buffer and the length of the buffer.

It will return a buffer (that will be released by the caller) containing HALF the autocorrelation (excluding the symmetric part).

For reference, the method signature and result should be equivalent to the one given by the following code:

-(float *) autoCorrelationForValues:(float *) values length:(NSUInteger) length {

float *ret=(float *)malloc((length+1)*sizeof(float));

float move[length];

memset(move,0,length*sizeof(float));

float res[length];

NSUInteger where=0;

for(NSUInteger i=0;i

Skills: C Programming, C++ Programming, iPhone, Mathematics, Matlab and Mathematica, Mobile App Development, Objective C

See more: fft of autocorrelation function, wiener spectrum, wiener -< khinchin >- theorem, autocorrelation and power spectral density, wiener >- khintchine formula, relation between autocorrelation and energy spectral density, generalized wiener khintchine theorem, wiener khintchine beziehung, config ios ssl vpn using anyconnect, can crack wpa network using osx, using anyconnect ios router, iphone clone using osx, video call using pjsip ios, using zlib ios, using siphon ios, using flash animation ios iphone, barcode reader ios using flex, chat application using jabber ios, port android ios using phonegap, upload file server using php ios

About the Employer:
( 5 reviews ) somerville, United States

Project ID: #17549212

7 freelancers are bidding on average $677 for this job

ambar

Will you want both Linear and Cyclic autocorrelation be implemented in your iOS/OSX app? In order to get Cyclic autocorrelation just need to be separate the Fourier transforms (i.e. using FFTs). When it comes to get pr More

$588 USD in 10 days
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8.4
wuyong2020

Hi, I am iOS expert and have rich experiences. I am very interested in this project. Hope to work with you. Best Regards

$588 USD in 10 days
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7.1
JinDongZhe

Dear Sir! I've just read your job post and much interested in your project. I have been creating high quality and excellent iOS and Android apps for 6+ years using Swift, Objectiv-C, Java. Here are some links to we More

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$555 USD in 10 days
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5.8
marketingmindz

We've 5+ years of experience in Mobile app development and have built multiple Mobile apps. We're confident we can work on develop Mobile apps you seek. Check the link to our mobile app development portfolio: More

$1500 USD in 10 days
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4.1
naishodayo

Hi, I am an experienced programmer and I'm sure I can complete your project asap. Please contact me and tell about your project details. I promise a high quality and punctual work. Thanks. autocorrelation using the Wi More

$555 USD in 4 days
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3.6
superbpartner

hello,dear. I have read all your requirements for 'autocorrelation using the Wiener–Khinchin theorem for iOS/OSX.' and I fully understood it. I am confident and I am sure that I am able to finish this project. Please c More

$555 USD in 4 days
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