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DCT
本文介绍了基于DCT 的图像压缩编码技术, 并给出了具体的实现方法和步骤, 既保证具有较高的压缩比, 又保证了较好的图像
质量。(This paper introduces the coding of image based on DCT , therefore,shows the details of realization . It provides high compressibility
and high quality.)
- 2009-05-22 01:37:43下载
- 积分：1
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Modbus-function-code_and-format
modbus 详细解说，协议文档。。。,包括了function。。。(modbus detailed explanation of the protocol documentation. . .)
- 2013-08-14 09:47:49下载
- 积分：1
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Superimposed-training
叠加训练序列的最小二乘信道估计与最小均方误差均衡，QPSK调制，做了4次迭代估计的性能对比。(superimposed training, least squares (LS) channel estimation, MMSE equalizer, QPSK modulation, 4 times iteration.)
- 2013-01-16 19:17:18下载
- 积分：1
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V1.26VCOM1.26
虚拟串口服务程序V1.26VCOM1.26，用于对串口通讯的学习。(Virtual Serial Port service program V1.26VCOM1.26, serial communication for learning.)
- 2008-05-22 21:42:00下载
- 积分：1
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跳频仿真
MATLAB跳频仿真源代码，展示了整个跳频通信过程，包括信号源产生、2FSK调制、跳频扩频、跳频解调、2FSK解调、抽样判决、恢复原始信号过程，适合初学者(MATLAB frequency hopping simulation source code, showing the entire frequency hopping communication process, including signal source generation, 2FSK modulation, frequency hopping spread spectrum, frequency hopping demodulation, 2FSK demodulation, sampling decision, restoration of original signal process, suitable for beginners)
- 2021-02-14 16:59:48下载
- 积分：1
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on-the-modulation-technology-in-OFDM
在 OFDM 数学原理和收发模型的基础上，本文对帧同步、定时同步、频率同
步和采样同步给 OFDM 系统所产生的影响进行了理论分析，同时讨论了基于循环
前缀或训练符号的典型 OFDM 同步算法。参考 802.11a 突发数据帧结构和系统参
数，分析几种 OFDM 同步算法用于突发分组传输的性能；在分析了几种经典的信
道估计算法基础上,通过对复杂度和性能的折衷，选择一种适合本文系统的估计
算法。最后作者提出一种改进型 LS 信道估计算法，该算法考虑了 LS 算法中噪声
的影响，从而提高了低信噪比下信道估计的精度。仿真结果表明，改进算法在低
信噪比下具有良好的性能。
(OFDM mathematical principles and transceiver model based on frame synchronization, timing synchronization, frequency synchronization and sampling synchronization to the OFDM system, the impact of the theoretical analysis are also discussed based on the cyclic prefix or training symbols typical OFDM synchronization algorithm . Reference 802.11a burst data frame structure and system parameters, analyze several OFDM synchronization algorithm for burst packet transmission performance several classic channel estimation algorithm based on a compromise between complexity and performance, select a suitable estimation algorithm in this article. Finally, the author proposed a modified LS channel estimation algorithm that takes into account the effects of noise in the LS algorithm, thus improving the low SNR channel estimation accuracy. Simulation results show that the improved algorithm has good performance in low signal-to-noise ratio.)
- 2013-05-10 15:18:30下载
- 积分：1
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CanDataAnalysisV1.01
说明： 汽车CAN总线数据采集软件，用于解析车辆总线数据的CAN ID。(An bus data acquisition software.Can idid for parsing vehicle bus data.)
- 2020-07-10 12:04:54下载
- 积分：1
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在 Matlab 中的认知无线电系统的仿真(237512)
认知无线电模型建立,频谱感知环境，可以选择认知用户授权用户个数(create the cognitive radio model)
- 2018-01-31 09:15:21下载
- 积分：1
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PCALEv1073A_FI
automatic link establishment radio software
- 2019-02-14 17:55:00下载
- 积分：1
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423132
OFDM channel estimation DFT single document, ultra-detailed, very helpful for understanding OFDM, but also helpful for understanding how to simulate channel estimation
- 2019-03-26 19:22:38下载
- 积分：1
