ALOHA scheme with dynamic Time Division Duplexed (TDD) transmission is designed and analyzed. A centralized (i.e., star) network is adopted as the topology of a cell which consists of a base station and a number of mobile clients. In dynamic TDD transmission mode, a channel is time-shared for downlink and uplink transmissions under the dynamic access control of the base station. We rst propose ...

This paper discusses a far-end crosstalk (FEXT) canceller for twisted-pair transmission. Many twisted-pair systems such as fiber-to-the-curb, very high-speed digital subscriber line, and high-speed LAN systems, use frequency-division duplexing (FDD) for duplex transmission. It is shown that the maximum reach of FDD twisted-pair system is limited by the performance of its upstream channel, which...

Future 5G systems are expected to provide higher performance, partly unleashed by massive MIMO as well as tight cooperation like joint transmission CoMP. For paired and unpaired spectrum below 6 GHz RF-frequency bands, frequency division duplex as well as time division duplex (FDD/TDD) has to be supported. The use of large cooperation areas over several cells together with massive MIMO downlink...

In this paper, we consider user selection and downlink precoding for an over-loaded single-cell massive multiple-input multiple-output (MIMO) system in frequency division duplexing (FDD) mode, where the base station is equipped with a dual-polarized uniform planar array (DP-UPA) serves large number of single-antenna users. Due to absence uplink-downlink channel reciprocity high-dimensionality m...

The IEEE 802.16 standard for broadband wireless access was recently approved . It defines a physical layer for systems operating at frequency bands between 10 and 66 GHz, a medium access control (MAC) protocol and the convergence layers for carrying protocols such as IP, ATM and Ethernet. An IEEE 802.16 system consists of a base station and one or more subscriber stations. The duplexing scheme ...

In this paper, the main aim is to design and simulate UTRA FDD control channel in the presence of noise and wireless channel by using FDD library/Matlab box set that can be used to design and implement some systems. Moreover, a test and verification of the library is achieved with different channel models such as Additive White Gaussian Noise (AWGN), fading and moving channel models. FDD librar...

Fault detection and diagnosis (FDD) systems can reduce high costs energy consumption. This paper presents a machine learning-based fault technique for actuators sensors in pressurized water reactor (PWR). In the proposed FDD framework, faults are first detected using shallow neural network. Second, is performed 15 different classifiers provided MATLAB Classification Learner toolbox, including s...

Mutations in BRI2/ITM2b genes cause Familial British and Danish Dementias (FBD and FDD), which are pathogenically similar to Familial Alzheimer Disease (FAD). BRI2 inhibits processing of Amyloid precursor protein (APP), a protein involved in FAD pathogenesis. Accumulation of a carboxyl-terminal APP metabolite -ß-CTF- causes memory deficits in a knock-in mouse model of FDD, called FDDKI.We have ...

We propose a comprehensive scheme for realizing massive multiple-input multiple-output (MIMO) system with dual-polarized antennas in frequency division duplexing (FDD) mode. Dual-polarized arrays are commonly employed due to the favorable property that, principle, they can double number of channel spatial degrees freedom less-than-proportional increase array size. However, processing MIMO is de...