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In this project, we have designed and implemented a method to estimate the dual frequencies in sinusoids immersed in additive white Gaussian noise. The Cramér-Rao lower bound (CRLB) for the signal model and a nonlinear least square frequency estimato
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OFDM Channel Estimator in time domain. Least Square Channel Estimator, Diagonal equaliser and LMMSE channel estimator.
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Quadrature ampliltude modulation has high spectral efficiency but is highly sensitive to power amplifier
nonlinearities. It is shown that an adaptive predistorter usig polynomial amplitude and phase
predistortion functions can be used to lineariz
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LS(Least Square,最小二乘法)算法是信道估计算法中最基本的算法之一。在MIMO-OFDM系统中,经常选择LS算法或其改进算法对信道进行估计。利用LS算法设计信道估计器,算法结构简单易于实现,且估计器不需要知道信道中各个收发天线对之间的自相关矩阵和噪声。-LS (further Square, Least Square) algorithm is one of the most basic algorithm of channel estimation algorithm. In M
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Abstract—Diagonal Bell Laboratories Layered Space-Time (DBLAST)
structure offers a low complexity solution to realize the
attractive capacity of Multiple-input and multiple-output (MIMO)
systems. In this paper, we apply D-BLAST in orthogonal fr
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最小二乘互信息估计法,基于最小二乘法来直接估计互信息。-least-square MI estimator
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本论文中,一个混合载波频率偏移估计方案用于基于通用滤波多载波的系统。 此方案所述CFO估计器基于最小平方(LS)准则首先导出以获得粗略频率偏移估计使用大频率搜索步骤。 接着,通过其精确估计残留频率偏移自相关操作补偿。 该算法具有较大估计的特点范围以及更高的估计精度。-In this letter, a robust hybrid carrier frequency offset
(CFO) estimation scheme based on training symbols is devi
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this the code of least square estimator-this is the code of least square estimator
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研究了扫描速度和扫描发射极位置的联合估计问题。该方法利用天线主梁的均匀旋转运动,将其扫过若干个独立的接收器。基于非线性最小二乘估计(NLS),建立了一个联合估计器。通过几个仿真实例,比较了所提出的估计量与cramer- rao下界(CRLB)的性能。(The joint estimation of scanning velocity and scanning emitter location is studied. The method USES the uniform rotating mot
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针对基于双曲线定位的DV-Hop算法中误差项的异方差性引起的定位误差大的问题,提出了一种基于加权双曲线定位的DV-Hop改进算法。算法分析了基于双曲线定位的DV-Hop算法模型中误差项的异方差性,用加权最小二乘法对异方差性进行纠正,对加权最小二乘法中的权值矩阵进行了推导并得到与跳数相关的最佳权值矩阵,使得误差项满足同方差性,所得估计值更加接近最佳线性无偏估计。仿真实验结果表明,所提算法在节点定位精度上较现有的基于双曲线定位的DV-Hop算法都有一定提高。(Aiming at the proble
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我们基于Jake模型重新推导了新的自相关函数,并基于新的自相关函数提出了一种通用最小均方误差(MMSE)信道估计器。 因此,由于其固有的鲁棒性,所提出的MMSE信道估计器可以被用于各种信道场景。 MMSE信道估计器的性能是通过实践DVB-T标准进行研究的,该标准表明MMSE信道估计器能以低复杂度实现非凡的最小平方误差性能(Based on the Jake model, we derive the new autocorrelation function and propose a univer
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