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In this paper, we consider a novel problem referred to as term filtering with bounded error to reduce the term (feature) space by eliminating terms without (or with bounded) information loss. Different from existing works, the obtained term space provides a complete view of the original term space. More interestingly, several important questions can be answered such as: 1) how different terms interact...
Vertical Bell-laboratories Space-Time (V-BLAST) is a multiple transmit and multiple receive antennas (MIMO) wireless systems. V-BLAST attains very high spectral efficiency while maintaining low implementation complexity. Among the detection algorithms of V-BLAST, Maximum Likelihood (ML) detection scheme performs the best, and however, its complexity is excessively high. To solve the problem, a reduced...
All the quorum generation algorithms based on greedy algorithm before denotes that the number of nodes selected to insert the quorum should change from one to N0.5, and the time complexity should change from O (2N3.5) to O (N!). Based on this phenomenon, a reasonable supposition will be proposed as follow: When the number of nodes selected to insert in quorum once is belong with the natural number...
Traditional networks are surprisingly fragile and difficult to manage. The problem can partly be attributed to the exposition of too many details of the controlled objects leading to the deluge of complexity in control plane, and the absence of network-wide views leading to the blindness of network management. With these problems, this paper decomposes the necessary network management information...
In this paper, we present a comparative study of the performance of the joint time of arrival/direction of arrival (TOA/DOA) estimation techniques - estimation of signal parameters via rotational invariance technique (ESPRIT), joint angle and delay estimation (JADE) and space-alternating generalised expectation maximisation (SAGE) - in the context of a strong multipaths model. We focus on a number...
The paper presents an inclusion relation which is used to verify the process of controller synthesis based on incompletely specified finite state machine model. State transition graph is adopted to describe the behavior of controller. State transition graph STG_org was abstract behavior description of controller synthesis generated before synthesized and state transition graph STGext was reversely...
In a fast fading channel, the orthogonality of the two consecutive STBC-OFDM symbols will be destroyed and the received signals can not be perfectly separated. As a result, the bit error rate (BER) performance will be degraded seriously. In this paper, we analyze several CCI cancellation decoders for the STBC-OFDM in a fast fading channel including the Alamouti method, SIC method, ML method, DMLD...
We consider the weighted sum rate maximization problem in downlink orthogonal frequency division multiple access (OFDMA) systems. A low complexity suboptimal resource allocation algorithm is proposed for joint optimization of multiuser subcarrier assignment and power allocation. This algorithm is based on an approximated primal decomposition based method, which is inspired from exact primal decomposition...
Support vector machine (SVM) has become a popular tool of pattern recognition in recent years for its outstanding learning performance. When dealing with large-scale learning problems, incremental SVM framework is generally used because SVM can summarize the data space in a concise way. This paper proposes a training algorithm of incremental SVM with recombining method. Considering the differences...
Recently, pulse position amplitude modulation (PPAM) has been proposed for ultra-wideband (UWB) communication systems. PPAM combines pulse position modulation (PPM) and pulse amplitude modulation (PAM) to provide better performance and higher system capacity with low computational complexity. A RAKE receiver can make use of the rich multipath of UWB systems to improve system performance and capacity...
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