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2FSK信号“指纹”特征的研究 被引量:18
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作者 王伦文 钟子发 《电讯技术》 北大核心 2003年第3期45-48,共4页
人有表示个体属性的指纹特征 ,无线电通信信号 (下称信号 )是否存在描述个体电台的电子“指纹”特征 (下称“指纹”特征 )呢 ?文中分析了信号“指纹”特征存在的可能性 ,并以 2FSK信号为例 ,论述了 2FSK信号应具有的“指纹”特征 ,同时... 人有表示个体属性的指纹特征 ,无线电通信信号 (下称信号 )是否存在描述个体电台的电子“指纹”特征 (下称“指纹”特征 )呢 ?文中分析了信号“指纹”特征存在的可能性 ,并以 2FSK信号为例 ,论述了 2FSK信号应具有的“指纹”特征 ,同时提取了其中部分“指纹”特征。 展开更多
关键词 2FSK信号 “指纹”特征 信号处理 无线电通信信号
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Radio-map Establishment based on Fuzzy Clustering for WLAN Hybrid KNN/ANN Indoor Positioning 被引量:9
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作者 Zhou Mu Xu Yubin Ma Lin 《China Communications》 SCIE CSCD 2010年第3期64-80,共17页
A novel radio-map establishment based on fuzzy clustering for hybrid K-Nearest Neighbor (KNN) and Artifi cial Neural Network (ANN) position algorithm in WLAN indoor environment is proposed. First of all, the Principal... A novel radio-map establishment based on fuzzy clustering for hybrid K-Nearest Neighbor (KNN) and Artifi cial Neural Network (ANN) position algorithm in WLAN indoor environment is proposed. First of all, the Principal Component Analysis (PCA) is utilized for the purpose of simplifying input dimensions of position estimation algorithm and saving storage cost for the establishment of radio-map. Then, reference points (RPs) calibrated in the off-line phase are divided into separate clusters by Fuzzy C-means clustering (FCM), and membership degrees (MDs) for different clusters are also allocated to each RPs. However, the singular RPs cased by the multi-path effect signifi cantly decreases the clustering performance. Therefore, a novel radio-map establishment method is presented based on the modifi cation of signal samples recorded at singular RPs by surface fitting. In the on-line phase, the region which the mobile terminal (MT) belongs to is estimated according to the MDs firstly. Then, in estimated small dimensional regions, MT's coordinates are calculated byKNN positioning method for efficiency purpose. However, for the regions including singular RPs, ANN method is utilized because ofits great pattern matching ability. Furthermore, compared with other typical indoor positioning methods, feasibility and effectiveness of this hybrid KNN/ANN method are also verified by the experimental results in static and tracking situations. 展开更多
关键词 WLAN indoor location fuzzy clustering principal component artificial neural network radio-map
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Software Radio: A Review of Design Considerations and Digital Hardware Choices 被引量:1
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作者 Parul Gupta Pradipta Dey +3 位作者 Shivkumar Kalyanaraman Wang Qing Chen Jianwen Lin YongHua 《China Communications》 SCIE CSCD 2009年第1期64-72,共9页
This paper reviews the requirements for Software Defi ned Radio (SDR) systems for high-speed wireless applications and compares how well the different technology choices available-from ASICs, FPGAs to digital signal p... This paper reviews the requirements for Software Defi ned Radio (SDR) systems for high-speed wireless applications and compares how well the different technology choices available-from ASICs, FPGAs to digital signal processors (DSPs) and general purpose processors (GPPs) - meet them. 展开更多
关键词 ASIC FPGA DSP GPP PROCESSOR software radio SDR wireless networks
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