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Traditional orthogonal frequency division multiplexing (OFDM) transmitter is implemented by exploiting inverse fast Fourier transform (IFFT), up-sampling, and low pass shaping filter (LPSF) modules, which occupy a large number of hardware resources and severely lower down the operation speed. To address these limitations, we propose a novel OFDM transmitter architecture, by which the aforementioned...
In this paper, according to the needs of a wireless network at the scene of the embedded controller, with Linux system as a platform, use Qtopia 2.2.0 graphical interface application framework and related development tools, using UDP network protocol, QT drawing tool developed a graphical interface application at the scene of the wireless embedded controller. Graphical interface, intuitive, completed...
Recent progress in establishing the capability of radios to operate in full duplex mode on a single channel has been attracting growing attention from many researchers. We extend this work by considering the application to small cells, in particular resource-managed cellular systems similar to the TDD variant of LTE. We derive conditions where full duplex operation provides improved throughput compared...
Dynamic spectrum sharing is a key technique to meet the high data rate demands of future wireless systems evolving towards heterogeneous networks. To make the best use of available frequency resources without creating interference to neighbor nodes, spectrally contained and scalable waveforms are needed. While OFDM has become the most popular multicarrier modulation (MCM) scheme, it suffers from high...
This paper firstly presents a fast ordering V-BLAST detection algorithm based on QR decomposition which is implemented in hardware platform of 4G TDD MIMO- OFDM wireless transmission demonstration system developed by our research team. This algorithm avoids the iteration for pseudo inverse in traditional Golden ZF-SIC by a new sorting scheme and achieves the same performance as traditional Golden...
Malware variants refer to all the new malwares manually or automatically produced from any existing malware. However, such simple approach to produce malwares can change signatures of the original malware to confuse and bypass most of popular signature-based anti-malware tools. In this paper we propose a novel byte frequency based detecting model (BFBDM) to deal with the malware variants identification...
One of the most critical issues in energy-limited wireless sensor networks (WSN) is how to make the most of energy efficient strategies to improve system performance. In this paper the system performance is represented by energy-efficiency and data-efficiency. First the case where all the wireless nodes are distributed uniformly is considered and an optimization problem is set up as well as resolved...
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