Two new methods are developed for blind estimation for long-code chaotic spread spectrum sequence.
针对长码实值混沌直扩系统，提出了两种盲解扩算法。
A fast realization method of the cyclic correlation based symbol rate blind estimation is proposed.
提出一种基于循环相关符号率盲估计的快速实现方法。
Channel estimation methods can be grouped into non-blind estimation, blind estimation and semi-blind estimation.
信道估计的方法从大的角度可以分为非盲估计、盲估计和半盲估计。
Blind estimation dose not need the pilots and USES the received signal to estimate the channel state information.
盲估计不需要导频符号，直接利用接收的信号对信道进行估计。
Base on this characteristic, this paper presents a passive image forgery detection algorithm which uses blind estimation of background noise.
本文利用这一特点，提出了一种基于背景噪声分析的图像真伪被动鉴别算法。
The improved algorithm uses cross-correlation between cyclic prefix and a special sub-vector from vector of received signal to implement channel blind estimation.
改进算法利用接收信号向量中的循环前缀与一个特定子向量作互相关来对信道作盲估计。
According to the characteristics of various algorithms, we can classify them into three types: pilot-assisted channel estimation, blind and semi-blind estimation.
根据算法的特点，信道估计可大致分为三类：基于导频辅助的估计、盲估计、半盲估计。
The blind estimation algorithm of Doppler frequency suitable for telemetry systems involving additional white Gaussian noise (AWGN) channels is proposed in this paper.
提出一种适应于在加性高斯白噪声信道(AWGN)下遥测系统的多普勒频偏盲估计算法。
Principles of each blind estimation structure are presented in this thesis and the algorithm performance is studied by both theoretical analysis and computer simulation.
论文论述了每一种算法结构的原理，从理论分析和计算机仿真两方面对算法性能进行了研究。
This thesis mainly focuses on the algorithms for channel estimation in the wireless OFDM systems including pilot assisted channel estimation and channel blind estimation.
本文主要研究无线OFDM系统中的信道估计算法，包括基于导频辅助信道估计算法和信道盲估计算法。
Simulation results demonstrate the validity of the novel labeled-delay transmit diversity scheme and the performance of the blind estimation of frequency-selective channels.
仿真结果表明了上述标签延迟发射分集方法的有效性及其信道盲估计方法的性能。
The receiver can estimate all the parameters needed for demodulation using blind estimation algorithms and recognize the modulation type using the MC algorithm proposed above.
该系统可以在完全未知信号参数的情况下，应用各种盲估计算法进行信号参数估计，以及进行调制方式识别。
An improved algorithm is proposed based on the conventional channel blind estimation algorithm which USES the auto - correlation matrix of the vector of received signal in the OFDM systems.
本文针对传统的OFDM系统中利用接收信号的自相关进行信道盲估计算法提出了一种改进算法。
A joint blind estimation method based on spectrum overlap for uplink interleaved orthogonal frequency division multiple access carrier frequency offset and timing synchronization is proposed.
提出了一种基于功率谱叠加的交织正交频分多址系统上行链路载波频偏和定时同步联合估计算法。
A new method of blind estimation for short-code chaotic spread spectrum sequence is proposed, which is based on principal component analysis (PCA) and has good performance at low SNR condition.
针对短码实值混沌直扩系统，提出了一种基于主元分析的算法，实现了在低信噪比下对直扩序列的盲估计。
But the blind estimation algorithm, for example, the sub-space decomposition, is not good for real time estimation because it requires large received signals, and has low estimation convergence rate.
但盲估计算法，如子空间分解法等，需要较大的样本值，收敛速率慢，不利于实时信道估计。
We analyze the blind parameter estimation of intercepted signal.
分析了截获信号参数的盲估计问题。
The second method is based on the virtual sub-carrier subspace blind channel estimation method.
第二种方法是基于虚拟子载波的子空间盲信道估计方法。
Blind image restoration has a strong background of mathematics, including estimation theory, ill-posed problem solution method, linear algebra, stochastic process, numerical analysis, and so on.
图像盲复原具有很强的数学背景，同估计理论、病态逆问题求解理论、线性代数、随机过程和数值分析等都有着密切的联系。
Based on uniform linear array and fourth order cumulant, a novel blind algorithm for spatial signature estimation was presented.
以均匀直线阵和四阶累积量为基础，提出了一种新的空间特征盲估计算法。
This paper considers the problem of blind symbol rate estimation of signals linearly modulated by a sequence of unknown symbols.
本文阐述了未知符号序列经线性调制后，在接收端利用循环相关理论对符号速率进行盲估计的问题。
Aiming at the phase ambiguity of the blind channel estimation in frequency domain, a blind channel estimation method in frequency domain based on dissymmetrical modulation constellation was proposed.
针对频域信道盲估计的相位模糊问题，提出了基于非对称调制星座的频域信道盲估计方法。
By unified signal model of antenna array Multicarrier DS-CDMA system, the subspace-based blind channel estimation is achieved.
通过在阵列天线多载波ds - CD MA系统下构造统一的信号模型，实现了基于子空间的信道盲估计。
A multiuser detector based on blind channel estimation is proposed.
提出了一种基于信道盲估计的多用户检测方法。
The blind detection, parameters estimation and recovery of spreading sequences are the main contents of DS communication counter.
直扩通信对抗包括直扩信号的盲检测、参数估计和扩频码序列恢复等内容。
A blind multiuser detection (MUD) method based on a new desired user 'signature waveform estimation method in antenna array CDMA systems is proposed.
针对天线阵c DMA系统，提出了一种基于新的待检用户信号波形估计的盲多用户检测方法。
This paper proposes a new method based on mixing matrix estimation for underdetermined blind speech separation, aiming at speech signals under weak sparseness.
针对语音信号的弱稀疏性，提出一种新的基于混合矩阵估计的欠定语音盲分离方法。
A new variable step-size CMA blind equalization algorithm is introduced to conquer the defects of CMA, in which the step size is controlled by the estimation of error signal's autocorrelation.
提出了一种自适应变步长恒模盲均衡算法，利用剩余误差信号的自相关函数估计值作为控制步长的因子来自适应改变步长的大小，克服了恒模算法存在的固有缺陷。
A new variable step-size CMA blind equalization algorithm is introduced to conquer the defects of CMA, in which the step size is controlled by the estimation of error signal's autocorrelation.
提出了一种自适应变步长恒模盲均衡算法，利用剩余误差信号的自相关函数估计值作为控制步长的因子来自适应改变步长的大小，克服了恒模算法存在的固有缺陷。
应用推荐