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Analysis and Evaluation of Performance Parameters and Trade-Offs for Fifth Generation Mobile Communication Systems

Thesis Info

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Author

Siddiqi, Muhammad Haroon

Program

PhD

Institute

National University of Sciences & Technology

City

Islamabad

Province

Islamabad

Country

Pakistan

Thesis Completing Year

2020

Thesis Completion Status

Completed

Subject

Electrical Engineering

Language

English

Link

http://prr.hec.gov.pk/jspui/bitstream/123456789/14425/1/Muhammad%20Haroon%20Siddiqui_MCS_NUST%202020%20isb%20prr.pdf

Added

2021-02-17 19:49:13

Modified

2024-03-24 20:25:49

ARI ID

1676727700528

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Fifth Generation (5G) is considered to be the future advancements in wireless technology. The ever increasing number of smart network devices may obsolete latest 4G technology for handling bandwidth allocation to a large number of smart devices. To meet with this challenging need, for rapid and efficient data transfer over such devices, requires next generation mobile technology. 5G technology is anticipated to offer appropriate solutions to such issues. High data rates can be achieved by using 5G, however, to make such futuristic technology realistic, is a real challenge. This challenging goal can be achieved by efficient utilization of the bandwidth in allocated spectrum. In this context, Cognitive Radio (CR), is an intelligent radio which has inherent adaptive procedures. It reuses the frequency when primary user is absent and works on principle of dynamic frequency allocation. CR is one of the key enabling technology for 5G networks which allows nodes to evaluate and manage underused licensed channels. It has brought benefits to a CR based 5G cellular networks which include ability to adapt dynamicity of a network, deals with the spectrum scarcity issue and operates in heterogeneous environment. It also provides intelligent solutions and self-governing capabilities to assist 5G key functions especially in smart beamforming. Another promising enabling technology of 5G is massive multiple-input multipleoutput (MIMO). Due to its attributes such as increased spectral and energy efficiency, it is envisaged as a potential technology for fifth generation (5G) wireless communication networks. As already mentioned that radio spectrum has become a scarce resource in wireless communications, hence imposes excessive cost on the high data rate transmission. Several linear and non linear detection techniques such as Zero-Forcing (ZF), Minimum Mean Square Error (MMSE), and Vertical Bell-Labs Layered Space Time (VBLAST) have been introduced. The purpose of such schemes is to mitigate the signal detection problems which are based on trade-offs between the bit error rate (BER) performance and computational complexities. The challenge in the design of massive- MIMO systems is developing less complex and efficient detection algorithms. The problem in building a receiver for massive-MIMO is to de-correlate the spatial signatures on the receiver antenna array. In this thesis, firstly, 5G technology, its challenges and proposed solutions are presented. Secondly, CR based 5G technology is investigated with the view to explore both technologies jointly and to present a comprehensive overview which will invigorate new research initiatives in this exciting field. Thirdly, a novel algorithm viz: Hybrid n-Bit Heuristic Assisted-VBLAST (HHAV) to perform an optimum decoding for massive-MIMO, is proposed. This structure is simulated in dynamic Rayleigh fading channel. One of the latest decoding algorithm viz: approximate message passing (AMP) is also evaluated with two threshold functions which include AMP with ternary distribution (AMPT) and AMP with Gaussian distribution (AMPG). Numerical results confirm that proposed HHAV algorithm performs significantly well as compared to the performances of aforementioned detection systems introduced in recent years. Finally, a novel 6G intelligent IOT paradigm is presented to optimize communication channels and process big data intelligently. The enabling technologies and AI based 6G air interface architecture, based on our proposed paradigm are also discussed. The results are evaluated through simulation by comparing our proposed paradigm with 5G-IOT and 5G intelligent IOT. In relation to our proposed concept, simulation results confirm that the performance in terms of effective utilization of channels is significantly improved.
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المبحث الثالث: العيون الحزينة

المبحث الثالث: العيون الحزينة

قصيدة " إلی عيني الحزينتين " لنازک الملائكة[1]


عینيّ، أيّ أسیً یرین[2] علیکما
ویُثیر[3] في غسق[4] الدجی[5] دمعیکما؟

إني أری خلف الجفُون ضراعۃ[6]
تستنطق[7] الکون[8] العریض المبھما[9]

أفقان تحت اللیل ألمحُ فیھما
فطرات ضوءٍ یرتشفن[10] الأنجما

ألکونُ مبتسمُ فأیّۃُ لوعۃٍ[11]
یا مقلتيّ[12] تلوح[13] في جفنیکما؟

مسکینتانِ، رأیتما ما لا یَرَی
جیلٌ أقام علی الضلال[14]، وحوّما [15]

جھل الحقائق في الحیاۃ، فلم یُطق[16]
عن زیفھا ھرباً وعاش مھوما [17]

مسکینتان کتمتما حمم[18] الأسیٰ[19]
فأبی[20] تأوّہ[21] خافقي[22] أن تکتما

فاذا الدموع غشاوۃ[23] رفّت[24] علی
جفنیکما، ، سیلاً سخیناً مفعما[25]

ورأیتما، خَلَلَ الدّموعِ، مفاتن ال
ماضي وطاف الشوقُ فی أفقیکما

عبثاً تصوغان[26] التوسّل في الدجی،
قلبُ القضاء[27] قضی[28] بألا تَنعما

عبثاً ، فیا عینيّ لا تتضرّعا[29]
لا شيء، یرجعِ بالجمال إلیکما

حسبي[30] وحسبکما الرضوخُ[31] لما قضّی
قلب اللیالي فارضخا[32] واستسلیما

کم حالمٍ من قبلنا فقد المنّی

Comparative Study of the Qur’anic Translations and Footnotes by A. M. Daryābādī and M. A. Lahorī’a

This paper highlights a comparative study of two translations of the Holy Qur‟ān. Muhammad „Alī Lahori‟s “The Holy Qur‟ān” and „Abdul Mājid Daryābādī‟s “Tafsir Ul Qur‟ān”. It deals with the biographies of both translators and general characteristics of these two translations. Many translators interpreted the Holy Qur‟ān in differentlanguages. Though they translated the text with specific- objectives, these translations helped spread the message of the Qur‟ān in the west and helped to refute the fabrications laid down by the west against Islam. Both translators Abdul Mājid Daryābādī and Muhammad „Alī Lahorī are Indian writers, editors and interpreters. Both translated the Holy Qur‟ān into English for western readers and in Urdu for the readers of subcontinent. Most interestingly, Muḥammad „Alī Lahorī is the person who inspired Daryābādī in his period of atheism. According to many scholars, Daryābādī admired the work ofLahorī just timely. But in the reality one can find that „Abdul Mājid Daryābādī imitated few aspects of Muḥammad „Alī‟s life and copied his work as well.

Developing Understanding of a Writing Frame for Explanation in Science Writing

My study emerged from the backgrounds of the present teaching and learning practices in explanatory writing in Science subjects. It has been observed that in our current education system, science writing is used for assessment purpose, and is mostly viewed as recording and collecting of factual information. The students' motivation towards science writing is also very low, as it is a mechanical process of writing memorized facts. However, if science writing is further extended to be more interactive, involving student's critical thinking and reasoning skills, then it has potential for learning. The students will find writing tasks much more enjoyable and this will increase their overall learning of the science concepts. The student's attempt of writing for explanation should be supported with strategies, which facilitate students to construct their own explanations during writing. Writing frame is one such strategy and provides students a skeleton, with beginning sentences and connectives to support explanatory writing. Throughout my study, I aimed to provide students with explanations in the form of causal relationships and predictions during teaching and writing of science concepts. During this time, my own understanding of developing writing frames evolved tremendously, which is reflected in my research finding. My research findings showed that the writing process for explanation cannot take place in isolation. Writing for explanation requires a conceptual understanding of the content, innovative teaching strategies, thinking and reasoning skills, a rich learning environment, and the presence of a teacher as a facilitator. I also found that students' misconception regarding science concepts were also highlighted. Another important finding was that writing frames raised motivation towards explanatory writing in Science. However, there were a few factors which impeded my research study. First, my inadequate understanding of writing frame was an impeding. Second, the low proficiency in English language was a barrier for the students in expressing their understanding of science ideas. Finally, there were also some supporting factor which enabled me to do my research that is my own determination and persistence throughout the study and support from the language faculty. The findings from the study has various implications like writing in Science requires an interdisciplinary approach. Finally, recommendations have been drawn based on the findings of the study.