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combinatory spread spectrum (PCSS) system was analyzed, and the new bit error rate (BER) formula improved from original formula was derived. In order to optimize the main parameters of PCSS system... increase; however, the system complexity rises when the set number of pseudo-noise sequences increases linearly. Key words: parallel combinatory spread spectrum system; bit error rate formula; parameters......
文献标志码:A 文章编号:1672-7207(2011)09-2676-05 Theoretical and experimental research on spread of base of rail in universal rolling DONG Yong-gang, ZHANG Wen-zhi, SONG Jian-feng (College of Mechanical Engineering, Yanshan University, Qinhuangdao 066004, China) Abstract: To obtain the spread of the base......
, the spread of the disease has a more profound understanding. The small-world networks theory was introduced, research findings relations to the small-world networks on the spread of disease research was described. The spread of disease trend was analyzed through the severe acute respiratory syndrome (SARS) outbreak in Hong Kong. Based on the outcome, it is reliable to use small-world networks......
at low SNRs. The algorithm shows good performance of interference detection at a wide range of SNRs. Key words: direct spread spectrum system; modulated lapped transform; threshold; interference...%. 图6 无干扰条件下5种方法的误检率曲线 Fig. 6 False detection rate of 5 methods without interference 分析原因可知:扩频信号和噪声之和在高信噪比条件下不再近似服从高斯分布,加之频谱泄露严重,门限系数的设置已经失效,因此在高信噪比下方法1,方法3和方法4的误检率很大,且误检率随着信噪比的提高而增大.方法1在整个信噪......
words: parallel combinatory spread spectrum; ultra-wideband; multiple pulse position modulation; bit error rate; complexity 并行组合扩频通信技术(PCSS)是在软扩频通信的基础上发展而来,相比普通的扩频通信系统及软扩频系统,拥有更高的信息传输能力,更高的频带利用率.同时,并行组合... in ultra-wideband system based on parallel combinatory spread spectrum GUO Li-li1, JIANG Xiao-fei1, QI Lin1, WU Jing2 (1. College of Information and Communication Engineering, Harbin Engineering University......
-error-rate (BER) performance of compressive spread spectrum (CSS) receiver, a modified CSS receiver based on support estimation was proposed. In the modified receiver, support of sparse signal...; 文献标志码:A 文章编号:1672-7207(2017)08-2088-09 Compressive spread spectrum receiver based......
transient trough flow, orifice outflow, and spread, to prevent the explosion. A comparison between the simulation data and the theoretical calculation results verifies that the model has remarkable... in the trough moves forward in a wave-like motion and causes a leakage. The spread of the leaked aluminum resembles a long strip on the ground. The leakage amount and spread area of liquid aluminum......
J. Cent. South Univ. (2020) 27: 3118-3132 DOI: https://doi.org/10.1007/s11771-020-4533-5 Effect of loading rate on fracture behaviors of shale under mode I loading XIE Qin(谢秦)1, LI Sheng-xiang(李生相... University, Nanjing 211189, China Central South University Press and Springer-Verlag GmbH Germany, part of Springer Nature 2020 Abstract: In this study, the effect of loading rate on shale fracture......
Experimental study and numerical simulation of spread law for fire on tunnelNIU Hui-yong(牛会永)1, 2, QIAO Chen-lu(乔晨露)1, 2, AN Jing-yu(安敬鱼)1, 2, DENG Jun(邓军)1(1. School of Energy and Safety Engineering... 411201, China)Abstract:In order to research spread law and distribution law of temperature nearby fire sources on roadway in mine, according to combustion theory and other basic, the theory model......
Phase transformation rate in hydrogen absorption of magnesium-based materialsZHANG Wen-cong(张文从)1, FANG Wen-bin(房文斌)1, YU Zhen-xing(于振兴)2, ZHAO Guo-liang(赵国亮)1, WANG Er-de(王尔德)1, SUN Zhi-jie(孙志杰)(1...:The hydrogen storage material Mg-Ni-MnO2 was prepared by mechanical alloying under the hydrogen atmosphere and its phase transformation rate in hydrogen absorption was studied using the self-designed......
