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Location-Based Service (LBS) becomes increasingly important for our daily life. However, the localization information in the air is vulnerable to various attacks, which result in serious privacy concerns. To overcome this problem, we formulate a multi-objective optimization problem with considering both the query probability and the practical dummy location region. A low complexity dummy location...
Previous research shows that it is possible to achieve full-duplex system as long as self-interference is cancelled enough. Digital cancellation method is an important step to remove the residue self-interference signal in digital domain. Compared with prior art, this paper purposes a novel digital cancellation method. The recursive least squares (RLS) algorithm is introduced and digital filter length...
The MapReduce processing framework is unaware of the property of underlying datasets. For ordered datasets (e.g., time-series data), in which records have been already sorted, MapReduce still performs unnecessary sorting operations during its execution. It directly results in a significant increase of execution time, as sorting a large volume of data is time-consuming. In this paper, we propose a...
Executing sequential program on multi-core is crucial for accommodating instruction level parallelism (ILP) in chip multiprocessor (CMP) architecture. One widely used method of steering instructions across cores is based on dependency. However, this method requires a sophisticated steering mechanism and brings much hardware complexity and area overhead. This paper presents the Global Register Alias...
In this paper, a low-complexity symbol detector is presented targeting the emerging 3GPP LTE and WiMAX standards. The detector is the VLSI implementation of a novel MIMO detection algorithm recently proposed. Compared to the design in the reference, the detector performs better while consumes less silicon area. Including a microcode controlled channel preprocessing unit and a pipelined detection unit,...
In this paper, a low-complexity symbol detector is presented targeting the emerging 3GPP LTE andWiMAX standards. The detector is the VLSI implementation of a novel MIMO detection algorithm recently proposed. Compared to the design in the reference, the detector performs better while consumes less silicon area. Including a microcode controlled channel preprocessing unit and a pipelined detection unit,...
Outlier detection in high-dimensional space is a hot topic in data mining, the main goal is to find out a small quantity of data objects with abnormal behavior in data set. In this paper, the concepts of the feature vector and the attribute similarity are defined, an improved algorithm SWHOT based on weighed hypergraph model for outlier detection in high dimensional space is presented. The objects...
This paper discusses implementation aspects of a recently proposed fixed-complexity soft-output (FCSO) symbol detector for MIMO systems (Larsson and Jalden, 2008). A further approximation to the FCSO detector is proposed which substantially reduces the complexity at the cost of a minor performance loss. With the resulting method, it is possible to carry out close-to ML detection for MIMO systems with...
The abounded keywords, which were active jamming in Chinese, induced a mass of malicious Web pages in network content security fields. These keywords were distorted with homophones or complexity characters to replace one of the character or with punctuations random jamming and so on. The conventional pattern matching in Chinese strings cannot filter or search for these distorted keywords which were...
An effective algorithm combining optimal wavelet packet basis (OWPB) algorithm and translation-invariant (TI) wavelet transform algorithm was put forward. Based on wavelet packet analysis, according to least cost function principle, OWPB of signal decomposition was obtained, which would better match the requested localization in the frequency domain and ensure an efficient de-noising: Firstly, the...
This paper studies efficient complex valued matrix manipulations for multi-user STBC-MIMO decoding. A novel method called Alamouti blockwise analytical matrix inversion (ABAMI) is proposed for the inversion of large complex matrices that are based on Alamouti sub-blocks. Another method using a variant of Givens rotation is proposed for fast QR decomposition of this kind of matrices. Our solutions...
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