[Κινητές και Δορυφορικές] 2014/2015

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[Ανεβάζετε τα θέματα των εξετάσεων στον τομέα Downloads]

Είσαι πρωτοετής;... Καλώς ήρθες! Μπορείς να βρεις πληροφορίες εδώ. Βοήθεια για τους καινούργιους μέσω χάρτη.

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[Αντιστοίχηση Μαθημάτων ΝΠΣ με ΠΠΣ]

Επίσημη ενημέρωση για Αντιστοίχηση Μαθημάτων ΝΠΣ με ΠΠΣ και η συζήτηση στο forum.

[Elade]

οι απορίες για τα παλιά θέματα μεταφέρθηκαν στο αντίστοιχο τόπικ. συνεχίστε εκεί.
εκ του συντονισμού

[ampoulog]

Μία ωραία παρουσίαση για το LTE, όπου μπορείτε να δείτε και πολλά από αυτά που συζητήσαμε φέτος

http://www.itu.int/ITU-D/arb/COE/2010/4G/Documents/Doc4-LTE%20Workshop_TUN_Session3_LTE%20Overview.pdf

[ampoulog]

Κάποια free tutorials από το comsoc (http://www.comsoc.org/free-tutorials):

1. LTE-Advanced Modem Design: Challenges and Perspectives (T7 13)

DESCRIPTION: Following the commercial success of LTE Release 8/9, LTE-Advanced is set to become the leading solution for 4G cellular systems across the globe. LTE-Advanced meets or exceeds the requirements set by the ITU for IMT-Advanced and offers increased peak data rate, higher spectral efficiency, and support to a larger number of simultaneously active subscribers. In order to meet such ambitious performance targets, LTE-Advanced relies on innovative radio-access technologies that bring new challenges to its design and implementation. Topics include: carrier aggregation, enhanced ICIC for HetNet, detection of eight-layer transmission, reference signals for enhanced multi-antenna support, and HARQ buffer management.


2. Challenges & Solutions in Prototyping 5G Radio Access Networks

DESCRIPTION: This talk addresses some of the key 5G challenges and requirements in the Radio Access Network (RAN) layer, as well as explores new design and development solutions that can demonstrate technological advancements in; carrier aggregation, spectral agility, and massive MIMO.


3. Heterogeneous Network Deployment: Challenges and Strategies

DESCRIPTION: In the next decade, Heterogeneous Networks will impose a challenge for network operators to make the best use of their existing network infrastructures, and to cost-effectively provide seamless coverage and capacity in indoor and outdoor arenas. Device-to-device communications will require future networks to be heterogeneous in terms of radio access technologies, fixed or mobile, access node types, and long or short range.

4. Big Data Cloud Computing

DESCRIPTION: Cloud Computing has already had a widespread impact on how we access applications, resources, and data. In recent years, there have been great improvements in processing capabilities and storage capacity, along with the ability to create networks that interconnect billions of smart terminals and trillions of devices. Key issues and challenges associated with cloud network architectures and the support of big data services and applications will be addressed.

5. Minimize Development Effort for Complex Wireless Applications Integrating both Hardware and Software on the Zynq All Programmable SoC

DESCRIPTION: Using an all-in-one radio DFE (digital front end) as an example, this tutorial will demonstrate the abilities of the Xilinx family of Zynq™ All Programmable SoCs to support complex carrier-grade, high-performance, and low-cost wireless applications. You can use the Zynq SoC’s programmable-logic fabric to implement real-time signal processing and high-speed interfaces while using the Zynq SoC’s two integrated ARM Cortex-A9 MPCore processors to handle the intricate computations required by these complex wireless applications. The tutorial will also discuss the advantages and disadvantages of SMP and AMP architectures in meeting different wireless requirements.

6. EFFICIENT USE OF SATELLITE RESOURCES SUPPORTING IP NETWORKS

Satellites provide IP-based converged voice, video and data communications access to deployed military forces. However, there are issues related to efficient use of expensive and limited space spectrum. There are overheads associated with the Internet Protocols (IP) and the need to encrypt critical messages. There are time delays in TCP-based flows. Rain fade can create increased bit errors, especially at higher frequencies. This seminar describes the latest technological innovations that address these issues. Adaptive coding/modulation increases effective capacity for channels susceptible to rain fade. Overlapped carriers enable uplink and downlink transmissions to share satellite bandwidth. More powerful satellites enable use of more efficient modulation and coding. TDM/TDMA/DAMA technology enables dispersed terminals to share spectrum taking advantage of statistical multiplexing in IP networks. The impact of IP overheads can be reduced, especially for voice traffic. Data traffic can be compressed. The performance of TCP-based transactions can be enhanced. A case history will illustrate the potential gains from combining these mitigations in a representative TDM/TDMA/DAMA satellite network.

[ampoulog]

<a href="https://www.youtube.com/watch?v=4zO79JczU7g" target="_blank">http://www.youtube.com/watch?v=4zO79JczU7g</a>

[ampoulog]

LTE Applications

<a href="https://www.youtube.com/watch?v=lJV-XeGp_Ns" target="_blank">http://www.youtube.com/watch?v=lJV-XeGp_Ns</a>

[ampoulog]

Υποβολή εργασιών

Τελική  ημερομηνία  υποβολής  εργασιών  ορίζεται  η  Πέμπτη  05/03/2015. 

Οι  ομάδες  καλούνται  να  στείλουν  τις  εργασίες  με  mail  με  τίτλο  [Κινητές  Επικοινωνίες]  Ομάδα  x,  όπου  x  ο  αριθμός  της  εργασίας,  στο  ampoulog@auth.gr. 

Θα  πρέπει  να  επισυνάπτουν  το  κείμενο  της  αναφοράς  και  τον  κώδικα  από  τον  οποίο  έβγαλαν  τα  αποτελέσματα  τους.

[nohponex]

Στο πνεύμα των ενημερωτικών ποστ σχετικά με το πεδίο:

http://www.zdnet.com/article/nokia-and-ntt-docomo-show-off-2gbps-speeds-in-5g-trial/

http://www.techrepublic.com/article/does-the-world-really-need-5g/

[ampoulog]

LTE-A

[ampoulog]

Making the best use of unlicensed spectrum

https://www.qualcomm.com/invention/technologies/1000x/spectrum/unlicensed

[ampoulog]

Οι βαθμοι έχουν ανέβει στο e-Thmmy.

Όποιος θέλει να δει το γραπτό του, ας στείλει e-mail.

[ampoulog]

[White paper] Understanding 3GPP Release 12: Standards for HSPA+ and LTE Enhancements

http://www.4gamericas.org/files/6614/2359/0457/4G_Americas_-_3GPP_Release_12_Executive_Summary_-_February_2015.pdf

[ampoulog]

<a href="https://www.youtube.com/watch?v=xRav7yVqRYc" target="_blank">http://www.youtube.com/watch?v=xRav7yVqRYc</a>

https://www.youtube.com/watch?v=xRav7yVqRYc

[ampoulog]

Τα  αποτελέσματα  εξετάσεων  του  Ιουνίου  2015  έχουν  αναρτηθεί  στο  Υλικό  Μαθήματα  στον  φάκελο  Αποτελέσματα  Εξετάσεων.

[ampoulog]

<a href="https://www.youtube.com/watch?v=FoEPlE8Pg7I" target="_blank">http://www.youtube.com/watch?v=FoEPlE8Pg7I</a>