{"id":7648,"date":"2021-03-09T13:34:03","date_gmt":"2021-03-09T18:34:03","guid":{"rendered":"https:\/\/blogs.mathworks.com\/community\/?p=7648"},"modified":"2021-03-09T13:53:29","modified_gmt":"2021-03-09T18:53:29","slug":"community-qa-akrem-hadji","status":"publish","type":"post","link":"https:\/\/blogs.mathworks.com\/community\/2021\/03\/09\/community-qa-akrem-hadji\/","title":{"rendered":"Community Q&A \u2013 Akrem Hadji"},"content":{"rendered":"

Akrem Hadji<\/a> is a top contributor to Cody.\u00a0 Here is a Q&A I did with Akrem who is a Telecommunications Engineer in Tunisia.\u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0 \u00a0\u00a0<\/span><\/p>\r\n \r\n\r\n\"\"<\/a>\r\n\r\n \r\n

Thanks for agreeing to this interview.\u00a0 When did you first get exposed to MATLAB and did you start using it right away, or did it take a while to grow on you?<\/b><\/div>\r\n

I started using MATLAB in 2012, during my engineering studies. We used MATLAB in class for signal processing. I recall the first exercise was to make an array of \u201cDirac'' pulses. After that, every lesson was a new opportunity to explore more tools. My skill has improved with time. In the beginning I remember that the MATLAB language was very practical with an arsenal full of all the needed functions. By the end of the first year in engineering, I was accustomed to use MATLAB in linear algebra, calculus, signal processing, optimization algorithms and more.\u00a0<\/span><\/p>\r\n\r\n

As a software developer do you still use MATLAB?<\/b><\/div>\r\n

I am a MATLAB user by nature, I usually implement algorithms and analyze results. Nevertheless, I believe coding skill must include the knowledge of debugging and handling errors. Sometimes I cannot separate one from another. A software developer should understand how his machine runs his code.<\/span><\/p>\r\n\r\n

Tell me about something interesting you have done with MATLAB.<\/b><\/div>\r\n

I built an indoor WIFI signal strength estimator. To achieve it, I used an indoor house plan as input. Then I transformed it into a matrix of coefficients according to the electromagnetic absorption of the corresponding materials (walls, glass, wood ...). Finally, I estimate the power of receiving WIFI signals transmitted from a fixed hotspot in the different rooms of that house by using the finite element theory.<\/span><\/p>\r\n

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Above is a picture of the input Matrix (radio power absorption).\u00a0 In this picture we can distinguish:<\/span><\/p>\r\n\r\n