IMT-Advanced

In this paper, a novel two-layered low profile multiband frequency selective surface (FSS) design was performed. Two independent FR4 dielectric layers were used in the design, with a thickness of 1 mm, a relative dielectric constant of 4.54, and a loss tangent of 0.02. The proposed FSS unit cell consists of a square frame, dodecagonal rings and upright bars. The FSS is designed for preventing harmful effects to human health from electromagnetic waves in the 800, 900, 1800, 2100, 2600 MHz frequency bands, used for IMT Advanced mobile phone and internet access service global system for mobile communication (GSM), is also designed for the Department of Defense (DoD) ground-based, high-powered shipborne and airborne radar systems 3500-3650 MHz frequency bands, which is known as US245 at United States Federal Table and to prevent interference effects in these frequency bands. The proposed FSS has a very compact size with a cell size of 0.17λ and therefore has a low sensitivity to the angle of incident wave. ANSYS highfrequency structure simulator (HFSS) software was used for verification of the design.

... The ASN-GW is interconnected with the BSs through a wireless point to point IEEE802.16 link that ... The WiMAX architecture can be used to support both IP and Ethernet packets. IP packets may be transported using the IP convergence sublayer (IP-CS) over IEEE 802.16e or ...

In this paper, a novel two-layered low profile multiband frequency selective surface (FSS) design was performed. Two independent FR4 dielectric layers were used in the design, with a thickness of 1 mm, a relative dielectric constant of 4.54, and a loss tangent of 0.02. The proposed FSS unit cell consists of a square frame, dodecagonal rings and upright bars. The FSS is designed for preventing harmful effects to human health from electromagnetic waves in the 800, 900, 1800, 2100, 2600 MHz frequency bands, used for IMT Advanced mobile phone and internet access service global system for mobile communication (GSM), is also designed for the Department of Defense (DoD) ground-based, high-powered shipborne and airborne radar systems 3500–3650 MHz frequency bands, which is known as US245 at United States Federal Table and to prevent interference effects in these frequency bands. The proposed FSS has a very compact size with a cell size of 0.17λ and therefore has a low sensitivity to the ang...

Relays are a cost efficient way to extend or distribute high data rate coverage more evenly in next generation cellular networks. This article introduces a radio resource management solution based on dynamic and flexible resource assignment a nd cooperative relaying as key technologies to enhance the downlink performance of relay based OFDMA cellular networks. It is illustrated how the dynamic

Non-Binary Low Density Parity Check (NB-LDPC) codes are expected to reduce the performance gap between binary LDPC and Turbo Codes for both short and medium length codewords, retaining in both cases the best of each. This paper presents the performance evaluation of NB-LDPC when compared to state-of-art channel coding techniques, namely Convolutional Turbo Codes (CTC) and Quasi-Cyclic LDPC. The performance evaluation is twofold: first at the link level and then at system level. In both analyses, it has been shown that the NB-LDPC codes outperform the benchmark codes giving a Signal to Noise Ratio gain up to 0.5 dB and improving the average throughput 5%. Besides, a complexity analysis is also provided for NB-LDPC showing that, using a low complexity decoder, the complexity is approximately one order of magnitude above that required in case of CTC or QC-LDPC.