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In generalised spatial modulation (GenSM) systems, the total number of active antenna groups is always not a power of two, which leaves room for designing an active antenna group (AAG) selection algorithm to achieve the constellation shaping gain and to improve the symbol error rate (SER). In this paper, based on uniform-cost search, a novel iterative AAG selection algorithm for GenSM systems is proposed...
Tire marks printed correctly can ensure the tire used properly. Tire mark regions in a tire image being extracted correctly are the first guarantee in a tire mark recognition system. In this paper, extraction algorithm based on radial scan method is discussed. Experiment results show that half character be extracted to tire mark regions occasionally via radial scan method. Hence, an improved extraction...
This paper addresses the performance degradation of near-capacity bit-interleaved coded modulation with iterative demapping and decoding (BICM-ID) when both demapping and decoding employ max-log-MAP algorithm. Two approaches are proposed to overcome the performance degradation: scaling of the transferred log-likelihood-ratios (LLRs) between demapping and decoding to mitigate the bias of LLRs values,...
Collaborative tagging system has become more and more popular and recently achieved widespread success due to flexibility and conceptual comprehensibility of tagging systems. Recommender system has the access to adopt tagging systems to achieve better performance. In this paper we consider that the items can be categorized into different classifications in which users show different interests. Here...
This article introduces the design and realization process of intelligentized online testing system based on templates. The biggest difference between this system and the traditional online testing system is: there is no item bank in this system, and all of the test questions are generated from the testing templates, and every template can generate endless test questions, which are of the same knowledge...
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