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Description: On the Energy Detection of Unknown Signals Over Fading ChannelsAbstract—This letter addresses the problem of energy detection of an unknown signal over a multipath channel. It starts with the no-diversity case, and presents some alternative closed-form expressions for the probability of detection to those recently reported in the literature. Detection capability is boosted by implementing both square-law combining and square-law selection diversity schemes. Index Terms—Diversity schemes, energy detection, fading channels, low-power applications, square-law detector, unknown signal detection.
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Size: 174453 |
Author: chenpeng3361 |
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Description: 01 红外线温度仪是怎样工作的？
所有物体都会发出红外线能量。 物体越热，其分子就愈加活跃，它所发出的红外线
能量也就越多。 红外线温度仪包括有光学装置，可以收集来自物体的辐射红外线能
量，并把该能量聚焦在探测器上。 能量经探测器转化为电信号，并被放大、显示出
来。
02 红外线温度仪的回应时间为多少？
红外线温度仪的回应时间比大多数温度计快：大约0.5 秒。
03 目标的最大测量距离为多少？
这取决于温度仪中的光学装置的性能。 使用距离/尺寸之比及目标直径来确定最大-01 infrared thermometer is how work? All objects will be issued infrared energy. More hot objects, the more active elements, it's also infrared energy will be. Infrared temperature instrument including optical devices, objects can be collected from the infrared radiation energy, and the energy is focused on the probes. By detector energy into electrical signals and was magnified displayed. 02 infrared temperature instrument response time? Infrared temperature instrument response time faster than most thermometer : about 0.5 seconds. 03 The greatest number of distance measurement? It depends on the temperature of the optical instrument device performance. The use of distance/size ratio and objectives to determine the maximum diameter
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Size: 372736 |
Author: 王刚 |
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Description: 语音信号的端点检测matlab程序，利用短时平均能量和短时平均过零率判断语音端点的起始。还有语音信号信噪比的计算程序。-Endpoint detection of speech signal matlab procedures, take advantage of short-time energy and short-time average zero-crossing rate of the average voice activity to determine the start. There are voice signal SNR calculation procedures.
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Size: 1024 |
Author: 高金枝 |
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Description: Simulink Energy detector to find Pf and Pmd
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Size: 15360 |
Author: dane |
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Description: Energy Detector Prototype for Cognitive Radio System
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Size: 138240 |
Author: C41N0 |
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Description: Matlab sensing spectrum using
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Size: 1024 |
Author: Adam |
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Description: 认知无线电技术的提出是为提高频谱利用率，而认知无线实现的关键技术是频谱感知，众所周知协作检测提高了衰落环境中认知用户系统检测的性能，该文章是基于协作检测提出新的检测方案，利用了双门限方法提高了系统性能，兼顾带宽有限和增强性能两个方面，是基于门限检测的协作检测性能优化的前提。对以后门限优化协作检测非常有用。-In this paper, we employ a double threshold method in energy detector to perform spectrum sensing, while a fusion center in the cognitive radio network collects the local decisions and observational values of the secondary users, and then makes the final decision to determine whether the primary user is absence or not. Simulation results will show that the spectrum sensing performance channels is improved significantly under the proposed scheme as opposed to the conventional method.
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Size: 374784 |
Author: 丽丽 |
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Description: This function implements a Voice Activity Detector algorithm based on signal energy, zero crosses, frequency, and adaptative thresholds.
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Size: 1024 |
Author: defghia |
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Description: This folder contains several codes which are about energy detector.
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Size: 2048 |
Author: Mandana |
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Description: This an energy plus sinewave detector-This is an energy plus sinewave detector
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Size: 1024 |
Author: Birhane |
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Description: spectrum sensing- energy detector
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Size: 2048 |
Author: imen_nasr |
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Description: 这是一款基于PIC单片机控制器的电能检测仪，通过FFT算法，计算出点电能的各个参数，以及谐波。-This is a PIC microcontroller-based controller of the power detector, through the FFT algorithm to calculate the point of the various parameters of electrical energy, and harmonics.
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Size: 198656 |
Author: wangzhongzhou |
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Description: Energy detector for CR system
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Size: 138240 |
Author: Vuongly |
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Description: It is the algorithm for energy detector in WRAN.
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Size: 2048 |
Author: Trivedi Urvi B. |
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Description: cognitive radio system with simple energy detector
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Size: 3072 |
Author: walid |
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Description: 基于usrp的频谱能级测量，通过调整频率来实现对不同carry frequency 的能级检测 -usrp based energy detector
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Size: 22528 |
Author: huihuang |
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Description: Spectrum sensing is the basic and essential mechanisms of Cognitive Radio (CR) to find the unused spectrum. This paper presents an overview of CR architecture, discusses the haracteristics and benefits of a CR. Energy detectionbased spectrum sensing has beenproposed and used widely because it doesnt require transmitted signal properties, channel information, or even the type of modulation. In this paper, a surveyof energy detector over Additive White Gaussian Noise (AWGN), different fading channels for spectrum sensing methodologies in cognitive radio is presented.Theoretical analysis of time domain energy detection and threshold setting is investigated. Cooperative spectrum sensing and a multiple antenna processing based energy detector receptions are also discussed.
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Size: 816128 |
Author: Hakim |
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Description: 认知无线电系统中采用能量检测频谱感知matlab代码，比较协作式感知时不同虚警概率下的结果-
认知无线电系统中采用能量检测频谱感知matlab代码，比较协作式感知时不同虚警概率下的结果
In cognitive radio system, the energy detection spectrum sensing matlab code is used to compare the results of different false alarm probabilities in cooperative sensing
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Size: 63488 |
Author: 宏哥 |
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Description: 认知无线电技术是当前缓解频谱资源紧张的有效解决方案，频谱感知是认知无线电的关键技术，其中，能量检测是经典的频谱感知算法，对于研究频谱感知的初学者来说比较重要。-Cognitive radio technology is an effective solution to alleviate the tension of spectrum resources. Spectrum sensing is the key technology of cognitive radio. Among them, energy detection is a classical spectrum sensing algorithm, which is important for the study of spectrum-aware beginners.
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Size: 5120 |
Author: 王刚 |
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Description: detection energy based on comparative to the sensitive uncertainty factor
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Size: 1024 |
Author: mahmood
|
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