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spacefrequencytime1
- Space time frequency coded mimo ofdm simulation
alamouti_space_frequency_coding1.m
- space time frequency coding-alamouti scheme
LaplacianPyramid
- Abstract—We describe a technique for image encoding in which local operators of many scales but identical shape serve as the basis functions. The representation differs from established techniques in that the code elements are localized in spatial fr
chapter4_3
- 图像在传输过程中，传递函数对高频成分有衰减作用，造成图像模糊，细节轮廓不清楚。图像锐化就是补偿图像的轮廓，增强图像的边缘及灰度跳变的部分，使图像变得清晰。亦分空域处理和频域处理两类[3]。-Image in the transmission process, the transfer function of the role of high frequency components are attenuated, resulting in image blurring, the details
c
- 本文阐述的编码规范主要使用在具备下面特性的软件： × 以 C/C++为编程语言 × 资源受限的系统,对性能有较严格要求的,如 CPU 主频较低、RAM/ROM 空间较小、外围存 储空间有限(FLASH、EEPROM) -In this paper, the coding standard primarily used in the software with the following features: × with C/C++ as a programming languag
SFBCOFDMSYSTEMS
- An effective technique to improve wireless communication performance is transmit diversity.In this transmitter diversity using a new combination of space-time block codes (STBCs) concatenated with orthogonal frequency division.
alowcomplexitydecodingarithmforOSTBCinfrequencycho
- 频率选择性衰落信道中一种低复杂度的正交空时分组码译码算法。该方案借鉴D-BLAST系统的检测方法，采用干扰抵消和干扰置零方法消除多径干扰，从而有效地检测出期望信号，译码复杂度低。有创新，希望给研究OSTBC译码的同志带来帮助。-Frequency-selective fading channel a low-complexity orthogonal space-time block code decoding algorithm. The program builds on D-BLAST s
startingdirctlyfromthesource
- 直接光是从光源出发，直接照射到物体表面，由于物体问的遮挡和光源照射范围等因素，直接光照变化非常剧烈，分布很不均匀。而间接光照是由直接光照射到物体表面后，经过多次反射、折射产生的，因此。每个方向都有来自环境的间接光照，而且在空间的分布比较均匀，没有剧烈的变化，属于光照中的低频成分。由直接光照和间接光照产生的物体表面的光照效果可以统一表示为-Just starting directly from the source, direct exposure to the surface, due to o
11
- 基于时空处理的盲二维角度和频率的联合估计，对阵列信号处理的有一定的帮助-Blind space-time processing based on two-dimensional angle and frequency of joint estimation of array signal processing is certainly helpful
5198916[1]
- Differential Space-Time-Frequency Codes for MB-OFDM UWB with Dual Carrier Modulation
Based-on--ESPRIT-
- 摘 要:基于子空间分解的ESPRIT算法常用在阵列处理中对目标进行DOA估计.如果将空间的位移变成时间的 延迟,单个矢量传感器可以实现高分辨率的频率估计.将ESPRIT与矢量传感器相结合,研究了高分辨率频率估计 算法,建立了矢量传感器的数据模型,推导了矢量传感器的空时阵列流形,通过对协方差矩阵进行子空间分解,求得 目标信号的频率估计值.仿真计算研究了不同信噪比!采样频率和数据长度条件下该算法的性能.结果表明基于矢 量传感器的算法比基于声压传感器的算法具有更高的频率估计精确度.
softwarephaselockedloop
- 在电网电压频率波动或者三相不平衡的情况下,硬件锁相很难准确检测到基波正序的相位。在结合PWM整流器空间矢量解耦控制算法的基础上,将软件锁相环技术应用在PWM整流器控制系统中,并用仿真和实验验证了该方案的可行性。实验结果表明,该方案解决了电网电压频率波动及三相不平衡时的相位同步等问题,并在工程上具有一定参考价值。-Frequency or voltage fluctuations in three-phase unbalanced case, the hardware lock is diffic
based-on-SVPWMvectorcontrol
- 为了给变频调速系统提供必要的设计参数，依据空间电压矢量脉宽调制（SVPWM）基本原理，介绍了 异步电动机及 SVPWM 算法在 Matlab/Simulink 环境下的建模过程及基于矢量控制理论的变频调速系统动态 模型建立。详细地阐述了实现仿真的方法，并针对仿真中的关键问题及系统的仿真结果进行了分析。仿真结 果表明，采用该控制系统，电压及转矩波动小，转速响应迅速，系统的各项指标都满足电机实际运行特性要 求。其仿真算法对于实现数字化控制变频调速系统具有一定的价值。 -To pr
improvment-of-performance-with-STBC-in-frequency-
- STBC technology used in frequency sensitive enviroment Performance evaluation and analysis of space-time coding for high data rate wireless personal communication.if you are intereting on STBC,you can get some useful inform information from it,please
paper3
- 基于分布式空频码的协作通信系统的信道估计及优化.pdf-Channel Estimation and Optimization for Cooperative Communication Systems Based on Distributed Space-frequency Coding
tvapm
- 水声通信面临的最困难的问题是多途干扰,其中自多途引起接收信号的幅度衰落,互多途引起接收信号的码间干扰,再加上海洋环境的高噪声背景、低的载波频率、极为有限的带宽以及传输条件的时间—空间—频率变化特性,使得通信过程十分困难。此外，水声通信试验的成本高，难度大，也为水声通信研究带来挑战。 本软件对水声信道的仿真研究很有帮助，可以产生声线图，冲激响应，声速图等仿真文件，结合Matlab画图工具绘制图像，对水声信道的模拟仿真很有帮助。-The most difficult problem fac
Antijamming-Performance-of-Space-Frequency-Coding
- Antijamming Performance of Space-Frequency Coding in Partial-Band Noise
[5]-Sensitive-White-Space-Detection-with-Spectral
- This paper proposes a novel, highly effective spectrum sensing algorithm for cognitive radio and white space applications. The proposed spectral covariance sensing (SCS) algorithm exploits the different statistical correlations of the received
1-comp
- In this paper, we investigate blind channel estimation for Multiple Input Multiple Output (MIMO) multi-carrier CDMA (MC-CDMA) systems in the uplink scenario. An Autocorrelation Contribution Matrix (ACM) method is proposed in comparison with the sub
Signal Space Diversity: A Power- and Bandwidth-Efficient Diversity Technique for the Rayleigh Fading Channel
- The increasing need for high data-rate transmissions over time- or frequency-selective fading channels has drawn attention to modulation schemes with high spectral efficiency such as QAM. With the aim of increasing the “diversity order” of the signal