Dr. Samy S. Soliman

Пікірлер

@bstanis1237 17 күн бұрын

الله يكرمك يارب شرح رائع وواضح ومتكامل, دكتور سامي لوسمحت فضلا منك لو تشرح لنا Estimation, equalization, synchronization that used at the receiver after wireless multipath wireless transmission (OFDM signals) بشيء من التفاصيل في مايخص الغايه منها ولماذا تستخدم وكذلك المعادلات والنموذجي الرياضي الذي يشرح مبدأ عملها اكون شاكر بجد لحضرتك الله ينور عليك دنيا واخره

@nohahany2789 23 күн бұрын

🤩🤩

@martinaiskander7573 29 күн бұрын

اشطر دكتور في الشرح والتوضيح .... دكتور متميز❤

@majdhamdan1117 29 күн бұрын

Extremely grateful!

@AsKdAh Ай бұрын

Can I get the power point files ? That will make it easy to write the note

@SamySSoliman Ай бұрын

You can find them here: sites.google.com/view/samyssoliman/courses/digital-communications?authuser=0

@AsKdAh Ай бұрын

@SamySSoliman thank you very much

@user-rfalkaabi 2 ай бұрын

السلام عليڪم استاذ ڪيف يمڪنني الحصول على المحاضرة السابقة

@SamySSoliman 2 ай бұрын

kzbin.info/aero/PL0052IEIwYNTVcdCR7FZ8xK4hNeybhSV4&feature=shared

@user-rfalkaabi 2 ай бұрын

@SamySSoliman جزاك الله خير جزاء المحسنين

@Noor-n2i9x 2 ай бұрын

ممكن pdf

@SamySSoliman 2 ай бұрын

sites.google.com/view/samyssoliman/courses/wireless-communications?authuser=0

@f.o7792 3 ай бұрын

عايزه افهم الماده بلغتي

@SamySSoliman 3 ай бұрын

The subsequent videos are in Arabic.

@MohammedAlsalem-c3o 5 ай бұрын

يعطيك الف عافيه❤

@Sereen-j4i 5 ай бұрын

ما شاء الله دكتور من أحسن الناس اللي بتشرح 🤍

@EAhmedEAlkhwlani 6 ай бұрын

I need all your videos to study very well why i cant open them

@SamySSoliman 2 ай бұрын

All videos are open. Best of luck.

@mohamedk.aladeb6203 7 ай бұрын

👌👌👌

@mohamedk.aladeb6203 7 ай бұрын

💓💓

@ahmednor5806 8 ай бұрын

شكرا جزيلا لحضرتك 🌹🌹🌹🌹🙏🙏

@ahmednor5806 8 ай бұрын

🙏🙏🌹🌹🌹🌹

@ahmednor5806 8 ай бұрын

🙏🙏🌹🌹🌹🌹

@ahmednor5806 8 ай бұрын

نفعنا الله بعلمك وجهدك محاضرات ممتازة ومفيدة شكرا 🌹🌹🌹🌹🙏🙏

@ahmednor5806 8 ай бұрын

🙏🙏🌹🌹🌹🌹

@ahmednor5806 8 ай бұрын

🙏🙏🌹🌹🌹🌹

@Tech4Geeks0 8 ай бұрын

جزاكم الله خيرًا.

@haidarpambudi4475 9 ай бұрын

Hello Dr. Samy. Thank you for the explanation. But, I have a question. How can I find the fading coefficient for Nakagami or Rician? Example: h for AWGN is 1 and h for Rayleigh is (rand+(rand*sqrt(-1)))/sqrt(2)

@yasomo8611 9 ай бұрын

very very very good video 🥸

@yasomo8611 9 ай бұрын

i will probably still fail the midterm but very good video sir

@SamySSoliman 9 ай бұрын

Many many thanks

@ahmedghallab5342 10 ай бұрын

شكرا جزاك الله خيرا , شرح رائع وسلس . ربنا يجعله في ميزان حسناتك ويرزقك الاخلاص. ادخلك الله الفردوس

@fatimasalah8536 10 ай бұрын

دكتور لو سمحت افتح الترجمه

@SamySSoliman 10 ай бұрын

للأسف مفيش ترجمة، ولكن الفيديوهات اللاحقة بالعربي 🙂

@fatimasalah8536 10 ай бұрын

افتح الترجمة لو سمحت😊

@ianailll 10 ай бұрын

يعطيك العافية

@MoustaphaNsangou-n7s 10 ай бұрын

S'il vous plaît je veux votre email

@MoustaphaNsangou-n7s 10 ай бұрын

Bonjour Dr , je votre email

@SamySSoliman 10 ай бұрын

samy.soliman[at]ualberta.net

@MoustaphaNsangou-n7s 10 ай бұрын

@@SamySSoliman ok

@MoustaphaNsangou-n7s 10 ай бұрын

Dr je veux être en contact direct avec vous.

@SamySSoliman 10 ай бұрын

Avec plaisir, samy.soliman[at]ualberta.net

@mohamedsalama5529 Жыл бұрын

شكرا جدا يادكتور اسلوب حضرتك ممتاز ، استاذنك ممكن سلايد الشرح

@ahmedabdelrhem518 Жыл бұрын

hello DR please, which will provide minimum bandwidth of passband channel which operates at 120 Mbit/sec --120 MHz QPSK or 16QAM or BPSK or 240 MHz QPSK

@ahmedabdelrhem518 Жыл бұрын

Hello Dr, please advise if this is true when M increases: M-ary FSK Bandwidth increase BER increases M-ary QAM Bandwidth decreases BER increases M-ary PSK Bandwidth increase BER increases

@SamySSoliman Жыл бұрын

Hello, Well, for such comparisons, we usually consider the BW and the BER in orders of magnitude, i.e. if we say it increases, that means it increases significantly. Accordingly, as we increase M: For FSK: The BW increases significantly, but the BER almost remains the same, or just increases slightly. For PSK and QAM: The BER increases (assuming the same average symbol energy), but the BW almost remains the same.

@SamySSoliman Жыл бұрын

If you use Matlab, There is an excellent tool that can give you quick insights to the changes in BER. The tool is "bertool".

@ahmedabdelrhem518 Жыл бұрын

thanks alot DR ❤

@abdelkhalekmohamed-f8x Жыл бұрын

dr.samy i gradated from computer science bachelor and i do master of information and communication technology ICT i have two obligation courses must complete them dsp and digital communication, want to know your opinion if it possible to understand both and pass the exam or as without any background about communication and signals or will be impossible to pass the exams

@SamySSoliman Жыл бұрын

Thank you for your inquiry, and best of luck in your pursuit. Regarding your question, it is definitely possible. However, the real challenge is not in Digital Communications or DSP themselves. It is mainly in the fundamentals that are needed to understand and follow-up those topics. For example, you need some fundamentals about statistics (this should be easy for you), Fourier analysis, vector calculus, types of systems and classes of signals. So, spending sometime in reviewing/studying those fundamentals will make the core topics in DSP and Communications much easier. If you need some recommended references for those topics, I can provide some. Best of luck.

@bstanis1237 Жыл бұрын

بارك الله فيك دكتور سامي شرح رائع، عندي استفسار في هذا السياق، منذ شهور كثيره وانا ابحث عن الجواب من كل مكان لكن لم اجد الجواب، ساطرحه عليك باللغه الانجليزيه لعلك عندك جواب دقيق، We have an OFDM signal of 40 MHz, and its baseband version I and Q signals drive two independent Low Pass Filters (LPFs) for pulse shaping, and each LPF is a cosine roll-off filter, so, please, I want to know the mathematical equation that allows us to calculate the cut-off frequency of this filter (ideal case) , As we know, in practical case maybe it is different, I get it by simulation, so I want to calculate it also theoretically (mathematically) for comparaison purpose اكون جدا شاكر لك دكتور لو عندك علم دقيق بهذا، والله يكرمك ويبارك في حضرتك.

@SamySSoliman Жыл бұрын

First, thank you for your comment and your question. Second, regarding your question, I assume you are using those filters for widowing purpose at the CP to avoid spectral growth, right? If this is the case, then the choise of the roll-off depends of the length of the CP and how many samples are within. An example of that can be found in these couple of paper: ieeexplore.ieee.org/document/8713090 ieeexplore.ieee.org/document/8651816 I hope this helps!

@bstanis1237 Жыл бұрын

@@SamySSoliman Thank you prof. Samy, no, low pass filters are used for pulse shaping, my question is how we can calculate mathematically cut-off frequencies of these low pass filters for both I and Q baseband signals (I have OFDM signal for example at 20 MHz); whist roll-off factors are clear !!

@SamySSoliman Жыл бұрын

OK, I see then. Because there is windowed-OFDM and pulse shaped-OFDM. In the basic principle of OFDM, ISI and ICI are sufficiently mitigated through cyclic prefix (CP). With pulse shaped-OFDM, other motivations are included. You will find a nice discussion in this paper: jwcn-eurasipjournals.springeropen.com/articles/10.1186/s13638-017-0849-8

@BY-iq5rc Жыл бұрын

from indonesia

@BY-iq5rc Жыл бұрын

Very helpful for student and hobbies

@SamySSoliman Жыл бұрын

Glad you think so!

@nohahany1794 Жыл бұрын

🤩

@AhmedGamal-t2e Жыл бұрын

ما شاء الله شرح كويس جداً ممكن لينك السلايدات لو سمحت؟

@SamySSoliman Жыл бұрын

The course slides can be found at: sites.google.com/view/samyssoliman/courses/telecommunication-systems

@comm7320 Жыл бұрын

Dear Dr Samy Hello, I joined your channel as a member but I can not access the member-only videos. I would like to know what is the problem. If it is possible to help me. Best regards

@SamySSoliman Жыл бұрын

You should be able to watch the videos easily. Please try again and let me know.

@ahmedbashnaini8844 Жыл бұрын

جزاك الله خير

@ahmedbashnaini8844 Жыл бұрын

جزاك الله خير

@NadaMohamed-ol9th Жыл бұрын

thank you dr samy , for this great course <3

@omarmohamed4516 Жыл бұрын

لو سمحت يا دكتور كنت عايز اسال حضرتك علي parameters of rician fading distribution

@SamySSoliman Жыл бұрын

Sure. The first expression has 2 parameters; s^2 represents the sum of the squared means of the two components of the Ricean variable, and sigma^2 represents the variance of the amplitude gain of each of the two components of the Ricean variable. The second expression also has 2 parameters; K is s^2/2 sigma^2 and Omega represents the second moment of the amplitude gain, and is equal to s^2 + 2 sigma^2.

@alaaproject Жыл бұрын

السلام عليكم ممكن الملف الخاص بالعرض؟

@SamySSoliman Жыл бұрын

It can be found here: sites.google.com/view/samyssoliman/courses/probability-and-communications-theory

@Mohamedezzeldin-k8h Жыл бұрын

السلام دكتور سامي أهلا بحضرتك أنا طالب بهندسة الاتصالات واريد تكملة دراستي في مجال الcommunication research فلو حضرتك ممكن تكون الmentor الخاص بيا

@SamySSoliman Жыл бұрын

With great pleasure. Just email me your CV at samy.soliman at ualberta.net

@bstanis1237 Жыл бұрын

سلام عليكم دكتور رمضان كريم تقبل الله منا ومنكم صالح الاعمال، بارك الله فيك علي الشرح الرائع جعلها الله في ميزان حسناتك، عندي استفسار وحيد يشغل بالي وتفكيري لو اجد عندك علم دقيق في مايخصه، كالتالي، نعلم ان تكنلوجيا ADSL تقدم لنا كذلك اتصال لاسلكي باستخدام الواي فاي مثلا، وان معيار الواي فاي يعتمد علي تقنيه التعديل OFDM وبالتالي، هل يحدث تعديل البيانات الرقميه باستخدام OFDM processing ثم رفعها علي 2.4 GHz RF carrier داخل الجهاز المنزلي؟ ام كيف يتم الامر؟

@SamySSoliman Жыл бұрын

شكرا جزيلا علي التعليق، وعلي السؤال. هو الحقيقة، تكنولوجيا ال ADSL ليس لها علاقة بال WiFi. فهاتان تقنيتان مختلفتان، يتم دمجهما في بعض الاستخدامات مثل الاستخدام المنزلي. ال ADSL تقنية سلكية تماما، وال WiFi لا سلكية تماما. اما بخصوص ال OFDM، فهو مستخدم في بعض انواع ال WiFi. kzbin.info/aero/PL0052IEIwYNQU0Ouf0oqCPq_rbzkVzIe8

@bstanis1237 Жыл бұрын

@@SamySSoliman جزاك الله خيرا دكتور، نعم فهمت عليك، عندي خلفيه ممتازه حول ما ذكرته لي لكن نعرف ان تقنيه ADSL تفدم خدمات الواي فاي بالمنزل فماذا تقصد دكتور يتم ذمجهما؟ هل ممكن نقول ان جهاز ADSL بداخله من حيث البنيه الالكترونيه يحتوي بداخله علي OFDM processor بحكم نعرف ان تقنيه الواي فاي هي مصممه من اجل معيار IEEE 802.11 n الذي يدعم OFDM

@SamySSoliman Жыл бұрын

Thank you dear friend. I meant that it is not accurate to say ADSL provides wireless connectivity. Years ago, the home device to which you connect the phone line (over which ADSL is used) had no WiFi module. In that case, you had to get a separate WiFi module (access point) and connect it to one of the ports of the ADSL router to have WiFi coverage. Now, that device is 3 in 1 (ADSL Rx, Router, WiFi access points). And for your main question regarding using OFDM in WiFi; Yes indeed. The WiFi TRX includes a baseband digital processing unit that implements OFDM, in addition to RF units for frequency conversion to/from 2.4GHz or 5GHz.

@bstanis1237 Жыл бұрын

@@SamySSoliman thank you so much Dr.Samy. I get the idea. Allah bless you :)