Process Noise Parameters of Beamforming Green Nodes

作     者：Umar Suleiman Dauda NikNoordini NikAbdMalil Mazlina Esa Kamaludin Mohd Yusof Mohd Fairus Mohd Yusoff Mohamed Rijal Hamid 

作者机构：Department of CommunicationFaculty of Electrical EngineeringUniversiti Teknologi Malaysia81310 Johor BahruMalaysia 

出 版 物：《Journal of Electronic Science and Technology》 (电子科技学刊（英文版）)

年 卷 期：2016年第14卷第2期

页      面：111-117页

核心收录：

学科分类：11[军事学] 0810[工学-信息与通信工程] 1105[军事学-军队指挥学] 0808[工学-电气工程] 0809[工学-电子科学与技术（可授工学、理学学位）] 0839[工学-网络空间安全] 08[工学] 081002[工学-信号与信息处理] 110503[军事学-军事通信学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported by the Ministry of Education Malaysia Universiti Teknologi Malaysia and RUG vote 11H60 

主　　题：Collaborative beamforming phasenoise process noise parameters universal software radioperipheral. 

摘      要：Signals arrive out of phase at the intended receiver from collaborative beamforming （CB） nodes due to the instability in the output frequency signals of the universal software radio peripheral＇s （USRP） local oscillator （LO）. These nodes including the target must synchronize their oscillator frequencies for coherent signal reception. In order to do this, frequencies and phases of the signals should be estimated in software defined radio （SDR） and smoothen with nonlinear filters such as the extended Kalman filter （EKF）. The process noise parameters of the NI USRP-2920 nodes will have to be calculated and used with the EKF process noise covariance matrix. These nodes are green communication hardware devices where most of the hardware units are now software defined. This article uses the direct spectrum method to obtain the phase noise values at various frequency offsets of the NI USRP-2920 in order to calculate the power spectral density of fractional frequency fluctuation. By applying the power-law noise model to this obtained value, the generated white frequency noise and random walk frequency noise values are q_1=1.93x10^-21 and q_2=5.86x10^-18, respectively.