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In this paper, we consider a multiuser multiple-input single-output downlink system for Simultaneous Wireless Information and Power Transfer(SWIPT). Different from the conventional battery-free power splitting strategy, the harvested energy can be buffered in a battery before consumption. Accordingly, increasing battery lifetime, where the base station is powered by sustainable energy. A sum rate...
The two-user multiple-input multiple-output (MIMO) Gaussian Broadcast Channel (BC) with mixed CSIT (i.e., delayed CSIT plus estimated current CSIT) under general antenna configuration is considered in this paper. Unlike the MISO scenario, obtaining tight characterization of the Degrees of Freedom (DoF) region seems difficult for the general MIMO BC settings. Despite that, the inner bound we provide...
We built a Simulink PHY Layer platform of OFDM-based IEEE802.11a standard. An improved puncturing method was proposed according to the principle of Viterbi decoding, and we did some simulations and analysis of the link layer properties under different Eb/N0 based on the same parameters of the PHY Layer in IEEE802.11a. We could reach the conclusion of the improved puncturing method increases about...
Distributed video coding (DVC) is considered as one promising video coding scheme for Wireless Video Sensor Network (WVSN) due to its high compression efficiency and error resilience functionalities, as well as the low encoding complexity. This paper presents an improved DVC scheme based on the source classification in wavelet domain. In this scheme, the new side information (SI) refinement method...
Excessive power dissipation caused by large amount of switching activities has been a major issue in scan-based testing. For large designs, the excessive switching activities during launch cycle can cause severe power droop, which cannot be recovered before capture cycle, rendering the at-speed scan testing more susceptible to the power droop. In this paper, we present a methodology to avoid power...
Distributed video coding (DVC) is considered as one promising video coding scheme for Wireless Video Sensor Network (WVSN) due to its high compression efficiency and error resilience functionalities, as well as the low encoding complexity. In this paper, an improved DVC scheme based on checkerboard pattern splitting for Wyner-Ziv (WZ) frame is presented. In specific, the modified three-dimensional...
This paper presents an improved feedback-assisted low complexity WZVC scheme. The performance of this scheme is improved by two enhancements: an improved mode-based key frame encoding and a 3DRS-assisted (three-dimensional recursive search assisted) motion estimation algorithm for WZ encoding. Experimental results show that our coding scheme can achieve significant gain compared to state-of-the-art...
In Wyner-Ziv video coding (WZVC), the majority of the computational complexity has been shifted from encoder to the decoder in comparison to its conventional video coding technologies. This paper presents a low-complexity frame/block motion activity classification algorithm for WZVC. Improved rate-distortion performance is achieved by adjusting the coding mode of key frame according to the motion...
Side Information (SI) generation is a key function in the DVC decoder, and plays a critical impact on the compression efficiency. This paper proposes an improved side information generation scheme of transform domain distributed video coding considering a novel content-based side information refinement technique, which is performed with the color and texture features to segment the side information...
Lossless coding is commonly found in binary image encoding with lower compression ratio. In this paper, image segmentation is used to classify the document image into line image regions, text image regions and halftone image regions. According to different features of each region, different encoding methods are applied to improve the image compression ratio. Adaptive arithmetic coding is used for...
Alamouti scheme provides a diversity gain no more than 2 over time-selective fading channels under the circumstances of 2??1 MIMO. A full-rate space-time code, space-time codes for time-selective fading (STC-TS), is proposed to provide more diversity gain when the channels fade fast. While the transmission lasts 2N (N>1) symbol periods, the diversity gain is almost 2N. What's more, the optimization...
An intrusion detection system (IDS) implements pattern matching approach on the network traffic to find the malicious packets carrying attack signatures. In this paper, a common field programmable gate array (FPGA) based on-board hardware architecture which is compatible with both ordinary string and perl compatible regular expression (PCRE) pattern matching is proposed to accelerate IDS. Furthermore,...
Distributed video coding (DVC) is a new paradigm in video coding, which is receiving a lot of interests nowadays. Side Information (SI) generation is a key function in the DVC decoder, and plays a key-role in determining the performance of the codec. This paper proposes an improved side information generation scheme, which exploits both spatial and temporal correlations in the sequences. Partially...
Two schemes of multiple-relay opportunistic cooperative transmission are proposed to optimize the performance of cooperative communication system, which select available cooperative nodes according to respective bit error rate (BER) and use broadcast channels among relay nodes to enhance the probability of detecting correctly at relay nodes. Expressions for theoretical BER performance of the multiple-relay...
Mobile phones with a camera function are capable of capturing image and processing tasks. Quick response code has been widely used in industrial information tagging applications where high data capacity, robust error corrections are required. It has become a kind of mobile 2D barcode which is used widely in China and Japan. In deal with the influence by the different light conditions and noise, a...
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