the monitoring of epileptic seizures is mainly done by means of eeg (electroencephalogram) monitoring. although this method is accurate, it is not comfortable for the patient as the eeg-electrodes have to be attached to the scalp which hampers the patient’s movement. this makes long term home monitoring not feasible. in this paper the aim is to propose a seizure detection system based on accele...

Wireless sensor network a powerful network contains many wireless sensors with limited power resource, data processing, and transmission abilities. Wireless sensor capabilities including computational capacity, radio power, and memory capabilities are much limited. Moreover, to design a hierarchy topology, in addition to energy optimization, find an optimum clusters number and best location of ...

A wireless ad hoc network typically refers to any set of wireless networks where all devices have equal status on a network and are free to associate with any other wireless ad hoc network devices in their range. As the nature of these networks, they commonly do not have external power supplies, and each node has a limited internal power source. In this paper, we put forward a new routing proto...

Time-Division Multiple-Access (TDMA) and Code-Division Multiple-Access (CDMA) have received much attention as potentially attractive multiple-access techniques for wireless networks, such as the future Personal Communications Network. The standard TDMA cellular network is designed so that physically adjacent cells are assigned different frequency bands, or channels, in order to reduce inter-cel...

In this paper, design and implementation of 4G SC-FDMA transceiver on FPGA is done and explained. Long Term Evolution (LTE) is next generation mobile communication standard from 3GPP, it is based on OFDMA) in Downlink Transmission and SC-FDMA in uplink Transmission. SC-FDMA is based on Frequency Division Multiple Access scheme. When compared with other multiple access scheme, it deals with the ...

Recently, a distributed estimation, a type of parameter estimation problem, has been widely studied from the viewpoint of wireless sensor network (WSN) applications (1) (2). In particular, distributed estimation has been well-studied for certain WSN applications, such as environmental monitoring and precision agriculture (3)-(8). In such applications, measurements are acquired by the combinatio...

We examine systems of fixed-channel reuse for base stations in an indoor infrared wireless communication system. The following techniques are compared: • time-division multiple access (TDMA) using on-off keying (OOK) or pulse-position modulation (PPM); • frequency-division multiple access (FDMA) using binary phase-shift keying (BPSK) or quadrature phase-shift keying (QPSK); • code-division mult...

In this study we investigate the performance of dynamic OFDM-FDMA systems including the cost of signaling. As dynamic OFDM-FDMA systems assign system resources (= sub-carriers, modulation types, power) periodically to different terminals, changing these assignments for the down-link data transmission require the access point to inform terminals about their new resource assignments. Hence, in or...

It is very important to achieve high performance in the SC-FDMA (single carrier frequency division multiple access) system that is used for LTE (long term evolution) and LTE-advanced system. To simultaneously resolve ICI(inter-subcarrier interference) and PAPR(peak to average power ratio) problem, focused on the two transmit(Tx) / one receive(Rx) antenna configuration, phase noise influence on ...