Description: 基于自适应免疫进化算法的多用户检；
本文采用自适应免疫进化算法来解决多用户检测问题. 通过计算机仿真,无论是抗多址干
扰还是抑制远近效应,此方法都明显优于传统检测方法,并且具有与最优检测器接近的误码率性能.-based on adaptive immune evolutionary algorithm multi-user location; In this paper, adaptive immune evolutionary algorithm to solve the problem of multi-user detection. through computer simulation, both anti-MAI or near-far effects, this method has been clearly superior to the traditional detection method and have the optimal detector close to the bit error rate performance. Platform: |
Size: 188719 |
Author:beer |
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Description: 基于自适应免疫进化算法的多用户检；
本文采用自适应免疫进化算法来解决多用户检测问题. 通过计算机仿真,无论是抗多址干
扰还是抑制远近效应,此方法都明显优于传统检测方法,并且具有与最优检测器接近的误码率性能.-based on adaptive immune evolutionary algorithm multi-user location; In this paper, adaptive immune evolutionary algorithm to solve the problem of multi-user detection. through computer simulation, both anti-MAI or near-far effects, this method has been clearly superior to the traditional detection method and have the optimal detector close to the bit error rate performance. Platform: |
Size: 188416 |
Author:beer |
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Description: 减状态MAP均衡器，符号错误概率意义上最优的检测器，-Reduce state MAP equalizer, symbol error probability sense, the optimal detector, Platform: |
Size: 70656 |
Author:james wang |
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Description: 数字图像的边缘检测
本科毕业设计（边缘检测是数字图像处理中的重要内容。本文首先对图像的边缘检测的各种算法和算子做了总结和分析。Canny最早提出了边缘检测的三条连续准则:最优检测结果、最优定位和低重复响应,并在这些准则的基础上得到了“最优线性滤波器”―高斯函数的一阶导数。经过十几年的发展,目前已经有了对这个准则的很多改进,本文也对这个方面的工作做了小结。Demigny在理论分析和实践的基础上给出了边缘检测的离散准则,并且证明在离散准则中Canny提出的第三个准则可以被阀值操作所取代。本文利用了数值方法求出了Demigny离散准则下阶梯形边缘检测的最优线性滤波器和对应着它的平滑算子。利用这个算子和Canny边缘检测方法得到了一个完整的边缘检测算法并用VC++实现了这种算法.从算法对大量图像边缘检测的结果来看,这种算法虽然简单但是效果很好,是边缘检测的一种很好的实用方法。-Edge detection is important in image procession. This paper made a summary and analysis of edge detecting algorithm and edge detector. Canny has proposed three continuous criteria to compare the performance of different filters: good detection, good localization and low-responses. Based on these criteria he got optimal filter for edge detection: derivative of Gaussian function. After more than ten years research, Canny’s theory has been ameliorated in many aspects, this paper also made a review of it. Based on the practice and theory. Demigny gave three discrete criteria for edge detection like Canny’s criteria and he has proofed that the third criterion can be replaced by an appropriate thresholding operation. This paper used numerical method to get the optimal filter and smooth operator under the Demigny’s criteria. Then I combine these filters and Canny’s edge detecting technique to get an integrated edge detecting algorithm. I have implemented the algorithm using VC++. From the res Platform: |
Size: 1397760 |
Author:swx |
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Description: Function to find SNR gain for a Stochastic Resonance detector and hence compute the optimal value of gamma, which is the quantizer threshold. Platform: |
Size: 1024 |
Author:Suresh |
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Description: Function to find SNR gain for a Suprathreshold Stochastic resonance detector and hence compute the optimal value of sigma, which is the optimal amount of noise to be added in order to obtain the highest SNR. Platform: |
Size: 2048 |
Author:Suresh |
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Description: 本文基于MIMO检测中性能和复杂度的矛盾，结合具体的MIMO
检测技术进行深入研究，致力于提供能有效缓解性能和复杂度矛盾冲
突的技术方案。论文首先介绍MIMO系统的基本模型，随后针对球
译码(Sphere Decoding)检测及其相关技术、搜索空间预定义检测器
(Search Space Predetermined Detector，SSPD)算法、并行计算对检
测算法的加速作用以及自动重传机制(Automatic Retransmission
reQuest，ARQ)带来的时间分集对复杂度压力的缓解作用等几方面
展开研究。-As far as is known，few literature deals with the quantified
relationship between complexity and detection performance of SD．
Sphere radius is proposed to be a transition parameter,thus the quantified
relationship is analyzed theoretically．This part of work can be divided
into three paas：1)In order to analyze the performance of SD，the
asymptotic bound of optimal performance is utilized，and latter the
performance loss caused by search space reduction is quantified with the
help of above bound．Since the performance loss is affected by the sphere
radius directly,sphere radius Can be used to represent the performance
feature of SD．2)Based on the characteristic of complexity of SD，derive
all upper．bound of average complexity；therefore the sphere radius
becomes the metric of average complexity．3)By making use of sphere
radius，the bridge between performance and complexity can be built．The
compute simulations verify above analysis for different MIMO use cases． Platform: |
Size: 5345280 |
Author:蜡笔 |
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Description: Under the assumption of absolutely no deterministic knowledge about the signal X(n), i.e., we assume that we know only the average power in the signal. In this case the optimal detector is energy detector or radiometer can be represented as [23] Platform: |
Size: 560128 |
Author:Hemant garg |
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Description: 计算成组滑动的滑窗检测器的最佳门限已知: 击中数N = 128, 组宽n = 8，PF =
10¡ 6，PD = 90 假设以下条件:
(a) 信号不起伏
(b) 忽略天线波束调制
1
(c) 计算PD时忽略目标区以外噪声的影响
组门限(第二门限)为K=8 滑窗的门限(第三门限)为L=16 (滑窗中包含的组数为16)
求解: 最佳的KOPT 和LOPT，对这题做了具体仿真实现。需要的朋友，一定知道很有用。-Optimal threshold calculated as group slidable window detector is known: hit number N = 128, the group width n = 8, PF = 106, PD = 90 assuming the following conditions: (a) signal is not undulation ( b) ignore the antenna beam modulation 1 (c) the calculation of PD ignored outside the target area noise of impact group door limit (the second door limit) for K = 8 sliding window of the door limit (third door limit) for L = 16 (sliding window contains group 16) to solve: the best of the KOPT the LOPT, these questions do specific simulation to achieve. A friend in need, we must know to be useful. Platform: |
Size: 3072 |
Author:ljr |
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Description: 盲多用户检测的LMS和RLS算法,在DS/CDMA通信系统中，为了解调出用户的有用信息，必须尽可能地抑制由其它用户扩频信号产生的多址干扰（MAI，Multiple Access Interference）。尽管最佳多用户检测器可以很好地抑制MAI，但其运算量会随着用户数的增加而呈指数增加。盲多用户检测技术可以在不知道其他用户信息的情况下检测出目标用户，所以在实际应用中有着十分重要的应用前景.-LMS and RLS algorithm Blind Multiuser Detection in DS/CDMA communication system, in order to demodulate the user useful information, must be possible to inhibit the spread spectrum signals generated by other users multiple access interference (MAI Multiple Access Interference) . Although the optimal multi-user detector can suppress MAI, but its computational complexity increases exponentially with the number of users increase. Blind Multiuser Detection technology can not know the other user information detected the target user, has a very important application prospect in practical applications. Platform: |
Size: 1024 |
Author:xiha |
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Description: 研究无线信道优化问题, 由于非确定性 M MIO系统的信道矩阵行不满秩特性, 导致 MM SE- GDFE左预处理后引入了强干扰, 使得传统 K- Best算法产生了误码平层效应。为了消除误码平层效应,提出部分最大似然和 K - Best结合算法, 并在初始检测的强干扰区域利用部分最大似然算法获得局部最优解, 降低强干扰对系统的影响消除误码平层效应, 进而在局部最优解的基础上利用 K- Best算法完成剩余符号的检测, 保证 M MIO 检测器的软输出特性。仿真结果表明算法消除了传统 K- Best算法中的误码平层效应, 保证了检测的可靠性-Research on wireless channel optimization problem, since non-deterministic channel matrix rows dissatisfaction rank M MIO system characteristics, resulting in MM SE-GDFE left after pretreatment introduced strong interference, the traditional K-Best algorithm to generate the error floor effect. To eliminate the error floor effect, made part of the maximum likelihood and K- Best combination of algorithms and strong interference detection using part of the initial area of the maximum likelihood algorithm to obtain local optima and reduce the impact of strong interference elimination system error leveling effect, and then use K-Best detection algorithm to complete the remaining symbols on the basis of the local optimal solution to ensure that M MIO soft detector output characteristics. Simulation results show that the algorithm eliminates the error floor effect of traditional K-Best algorithm to ensure the reliability of detection Platform: |
Size: 491520 |
Author:杨佳琳 |
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Search - optimal detector