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turbo-encoding-and-decoding-using-MAP-algorithm
turbo encoding and decoding using map algorithm.interleaver is s-random interleaver
- 2020-12-09 16:49:20下载
- 积分：1
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语音处理，改变声调、语速等，matlab代码
说明： 语音处理 改变声速变速不变调 改变声调不变速(Speech Processing Variable Speed Modification)
- 2019-05-31 17:44:30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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8PSK调制解调
运用matlab实现8PSK信号的调制与解调(relization of modulation and demodulation of 8PSK signal by Matlab)
- 2020-09-04 21:08:06下载
- 积分：1
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pracsim-2
通信基本仿真2适合初学者学习的代码,包括了调制,分析等等:使用IIR filter的经典模拟滤波器（巴特沃斯Butterworth,切比雪夫Chebyshev）,Bartlett周期图谱，加窗Bartlett周期图谱，基带波形仿真，IIR的贝塞尔滤波器Bessel Filter，二进制对称信道Binary Symmetric Channel仿真，比特序列，Remez滤波，BPSK复合基带信号仿真，载波生成器，椭圆滤波器Elliptical Filter，FFT,FSK调制及解调，高斯噪声Gaussian仿真，直方图，理想AM，线性PLL，BP混淆器，理想MPSK，正交振幅调变（QAM，Quadrature Amplitude Modulation），正交相移键控(QPSK)，Rayleigh Noise瑞利噪声，Yule-Walker Psd功率谱密度函数。(matlab simulate2)
- 2009-12-26 23:10:29下载
- 积分：1
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jian
说明： 整个仿真系统是从发射端、瑞利信道、接收端大致的过程(The entire simulation system is a rough process from the transmitter, the Rayleigh channel, and the receiver)
- 2020-08-25 16:21:59下载
- 积分：1
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Schmidl_Cox_original
OFDM 同步技术研究 Schmidl_Cox算法 定时估计matlab程序(OFDM the synchronization technology research S&C algorithm timing estimation)
- 2012-10-15 07:34:04下载
- 积分：1
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revised_simu_multi_path
matlab中离散信号小数点时延的实现算法,可以精确实现一段序列的延时(numerical time-delay)
- 2012-04-12 15:39:37下载
- 积分：1
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代码
说明： 基于MATLAB编程实现m序列、gold序列、kasami小集序列，并分析各自的自相关，互相关性能。(Based on MATLAB programming, m-sequence, gold sequence and Kasami small set sequence are realized, and their autocorrelation and cross-correlation performance are analyzed.)
- 2020-08-14 09:13:24下载
- 积分：1
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sesource
Cbuild操作西门子tc35模块的源码,可以控制短信芯片,进行收发操作和端口操作,()
- 2018-02-03 12:58:53下载
- 积分：1
