Based Wireless Systems

In this paper, we aim to enhance spectrum efficiency in infrastructure-based Non-Orthogonal Multiple Access (NOMA) networks over Rayleigh fading channels. To achieve this, we introduce a Simultaneous Wireless Information and Power Transfer (SWIPT)-enabled Two-Way Relay (TWR) system.

9p viyoko 01-10-2024 2 1   Download

This research investigates other built-in sensors and develops methods for improving the accuracy of indoor positioning. Combination with the wireless network, it can be a viable alternative solution for the indoor positioning purposes of the smartphone users. The main advantage of this solution is that it can be deployed with a minimal cost, as no specialized hardware is necessary for setting up the system.

91p runthenight05 01-03-2023 11 3   Download

The key access technologies in current and next generation wireless systems is OFDMA. Packet scheduling plays an important role in QoS provisioning by providing mechanisms for the resource allocation

42p nhq_khtn 07-11-2013 61 4   Download

Flexible and scalable wide area network using satellite backhauls and configurable wireless ground access. Supports broadband multimedia applications and all-IP based mobility management.

22p nhq_khtn 07-11-2013 50 3   Download

IEEE 802.11 is a set of standards for implementing wireless local area network (WLAN) computer communication in the 2.4, 3.6, 5 and 60 GHz frequency bands. They are created and maintained by the IEEE LAN/MAN Standards Committee (IEEE 802). The base version of the standard was released in 1997 and has had subsequent amendments. These standards provide the basis for wireless network products using the Wi-Fi brand.

18p muathu_102 28-01-2013 57 5   Download

WPA: A rush solution to the security problems of WEP WPA2: Based on 802.11i (official version) Encrypt and authenticate MSDUs: counter mode-CBC MAC protocol with AES-128 Authenticate STAs: 802.1X Initialization vectors transmitted in plaintext are no longer needed to generate per-frame keys But most of the existing Wi-Fi WPA cards cannot be upgraded to support 802.11i

28p muathu_102 28-01-2013 59 5   Download

Radio based communication, open air The attacker, having a radio transmitter and receiver with the same radio frequency of the underlying wireless network, can easily: Intercept wireless data Connect his computing devices to a nearby wireless network Inject new packets to an existing wireless network Jam a particular wireless channel using a jamming device Security measures Implement encryption algorithms, authentication algorithms, and integrity-check algorithms at the data-link layer Provide network access with wired equivalent privacy Higher-layer protocols and applications can be used ...

32p muathu_102 28-01-2013 54 5   Download

When installing a manually configured adapter, what information must you know to avoid resource conflicts? A. IRQ B. Number of bits C. Base I/O port address D. Base Memory address E. Operating System 2) Which IRQ is usually assigned for the primary IDE hard disk controller? A. 5 B. 7 C. 9 D. 14 E. 15 3) Which IRQ is assigned to the first serial port?

5p nguyenbeo86 24-11-2012 49 3   Download

Interface converter, for converting RS-232 to RS-422 and RS-485, with electrical isolation, 2 channels Bidirectional, wireless, 2400 MHz transmission system (European version), consisting of 2 transceivers (transmitter and receiver) and two antennas with connecting cable Fieldline Modular Wireless IO set, consisting of: Wireless IO base station for one Wireless IO terminal and Wireless IO device, 8 digital inputs, 8 digital outputs

23p buisontdtq 04-10-2012 52 9   Download

Network Security Identify security risks in LANs and WANs and design security policies that minimize risks Explain how physical security contributes to network security Discuss hardware- and design-based security techniques Use network operating system techniques to provide basic security Understand methods of encryption, such as SSL and IPSec, that can secure data in storage and in transit Describe how popular authentication protocols, such as RADIUS, TACACS, Kerberos, PAP, CHAP, and MS-CHAP, function Understand wireless security protocols, such as WEP, WPA, and 802.11...

56p itvovantien 13-07-2012 82 11   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Robust System and Cross-Layer Design for H.264/AVC-Based Wireless Video Applications

15p dauphong20 10-03-2012 49 4   Download

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Research Article Implementation of Wireless Communications Systems on FPGA-Based Platforms

9p sting11 09-03-2012 42 3   Download

Tuyển tập các báo cáo nghiên cứu về hóa học được đăng trên tạp chí sinh học đề tài : IDEA1: A validated SystemC-based system-level design and simulation environment for wireless sensor networks

20p dauphong11 06-02-2012 41 4   Download

This paper describes an architecture for differentiation of Quality of Service in heterogeneous wireless-wired networks. This architecture applies an “all-IP” paradigm, with embedded mobility of users. The architecture allows for multiple types of access networks, and enables user roaming between different operator domains.

12p trinhhiephoa 30-12-2010 166 42   Download

In the last two decades, wireless communication systems such as cordless phones, paging systems, wireless data networks, satellite-based and cellular mobile systems have been steadily increasing in both popular importance and technological sophistication. The firstgeneration wireless systems were developed in the late 1970s and 1980s and were based on analog technology (such as the Advance Mobile Phone Service (AMPS) by AT&T and Nordic Mobile Telephone (NMT) by Ericsson).

26p tienvovan 11-09-2010 61 5   Download