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spectral-communication

于 2011-11-18 发布文件大小:9399KB

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扩频通信完整的课件和习题答案，清华经典教材，学习无线移动以及跳频通信的基础(Spread spectrum communication courseware and exercises complete answer, Tsinghua classic textbook, learning, and frequency hopping wireless mobile communication base)

文件列表：

扩频通信课件完整版
..................\第1章.ppt,1516544,2009-07-12
..................\第2章.ppt,1646592,2009-07-12
..................\第3章.ppt,2208768,2009-07-12
..................\第4章.ppt,2001408,2009-07-12
..................\第5章.ppt,2248192,2009-07-12
..................\第6章.ppt,1289728,2009-07-12
..................\第7章.ppt,1609216,2009-07-12

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卫星通信中数字调相信号调制方式识别方法研究
说明：针对数字卫星常用的 7 种通信信号调制方式(QPSK、8PSK、16QAM、32QAM、64QAM、16APSK、32APSK)，对零中心归一化瞬时幅度谱密度最大值、四次方谱、幅度、高阶累积量四种特征参数进行了分析，提出了一种联合特征参数的信号调制识别方法．(Aiming at seven communication signal modulation modes commonly used in digital satellite (QPSK, 8PSK, 16QAM, 32QAM, 64QAM, 16APSK and 32APSK), four characteristic parameters of zero-center normalized instantaneous amplitude spectral density, quadratic spectrum, amplitude and high-order cumulant are analyzed, and a signal modulation recognition method of joint characteristic parameters is proposed. Method.)

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5-Mbps-optical-wireless-communication-with-error-
One issue with underwater sensors is how to efficiently transfer large amounts of data collected by the node to an interrogating platform such as an underwater vehicle. It is often impractical to make a physical connection between the node and the vehicle which suggests an acoustic or optical wireless solution. For large amounts of data, the high bandwidth of underwater optical wireless is an advantage. A small, low-cost platform to demonstrate the potential of an optical wireless communications interface for underwater sensor nodes is demonstrated. To enhance the reliability and robustness of the optical wireless communication digital signal processing and error correction techniques are used. The system was tested in 3 and 7.7 meter tanks at 5 Mbps with the turbidity of the water controlled by the addition of Maalox.

2011-07-31 04:23:47下载

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spectral-communication

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