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PCM
说明： 在实际的调谐解调电路中，采用的是非相干载波解调，本振信号与发射端的载波信号存在频率偏差和相位抖动，因而解调出来的模拟I、Q基带信号是带有载波误差的信号。这样的模拟基带信号即使采用定时准确的时钟进行取样判决，得到的数字信号也不是原来发射端的调制信号，误差的积累将导致抽样判决后的误码率增大，因此数字QPSK解调电路要对载波误差进行补偿，减少非相干载波解调带来的影响。(In the actual tuning and demodulating circuit, non-coherent carrier demodulation is adopted, and the frequency deviation and phase jitter of the local oscillator signal and the carrier signal of the transmitting end are present, and thus the demodulated analog I and Q baseband signals are signals with carrier error.)
- 2019-01-30 20:16:08下载
- 积分：1
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impulsive-noise-simulation-PLC
电力线信道噪声模型matlab仿真，在输入端把脉冲噪声模型放入电力线OFDM通信系统，输出端用特定算法解码。(The algorithm estimates the impulsive noise in powerline communication, and subtract out an estimate of the impulsive noise in the current OFDM frame.)
- 2013-01-26 17:10:49下载
- 积分：1
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Low-Complexity-PAPR-Reduction-Technique-for-STBC-
Selective mapping algorithm is proposed to reduce the peak-to-average power ration (PAPR) in MIMO-OFDM system.
It is proved that the conjugate symbols on two antennas have the same PAPR property with orthogonal space-time block coded (STBC). By using the characteristic, the computational
complexity cost and the side information (SI) is significantly
reduced compared with the concurrent SLM algorithm.
Simulation results demonstrate that the performance of the proposed algorithm outperforms the conventional concurrent
SLM algorithm.
- 2014-01-01 06:04:45下载
- 积分：1
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程序
说明： 当今世界电子对抗日益激烈，对于雷达低截获和抗干扰能力的研究越来越受到关注。OFDM (Orthorgonal Frequency Division Multiplexing，正交频分复用)雷达具有大时宽带宽积、波形设计方法灵活、频谱利用率较高以及低截获性能好的特性，因此逐渐成为雷达领域的重点研究方向。除此之外，OFDM信号时域和频域波形都比较复杂，当雷达信号采用OFDM技术时，敌方很难精确估计发射信号波形和瞬时频率，使得截获机不容易分析出检测到的雷达信号。当面对敌方的欺骗式干扰时，对于同样具有大时宽带宽积的线性调频信号，OFDM信号具有更好的抗欺骗式干扰的性能，因此OFDM技术在雷达上的运用愈来愈得到关注。(As electronic warfare becomes increasingly fierce, low intercept probability radar has become an important research filed in electronic countermeasures. OFDM (Orthorgonal Frequency Division Multiplexing) radars have gradually emerged due to their high spectrum efficiency, large time-bandwidth product, flexible waveform design methods, and low intercept probability.In addition, because of the complex time-frequency characteristics of the transmitted signal in OFDM radar, the enemy is difficult to estimate the transmitted signal waveform and instantaneous frequency.When faced with enemy deception interference, OFDM signals have better anti-spoofing performance for LFM signals that also have a large time-bandwidth bandwidth product. Therefore, the use of OFDM technology in radar is attracting more and more attention. .)
- 2020-11-19 21:49:39下载
- 积分：1
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ccdf_of_clipped_foltered_ofdm_signal
说明： 正交频分复用（OFDM）信号的互补累计函数(ccdf_of_clipped_foltered_ofdm_signal)
- 2020-07-07 11:09:12下载
- 积分：1
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搭建BPSK+编码+交织仿真通信链路
说明： 搭建 BPSK+编码+交织仿真通信链路，仿真分析在不同信道条件下的不同译
码算法的误比特率性能。基于 matlab，搭建 BPSK+卷积编码+交织通信收发链路，
仿真参数如下： 1) 信源比特速率： 100 b R kbps = 2) 卷积编码：码率为 1/2，生成多项式为（561,753） 3) 译码方式：维特比译码（硬判决译码、软判决译码（8 比特量化）） 4) 交织：行列交织，交织器深度为 100bit，宽度为 10； 5) 仿真点数：106 1. 在 AWGN 信道下，仿真并绘出该系统在硬判决和软判决（3bit 量化）两
种译码方式下的信源误比特率曲线，并进行分析。 2. 设定某种交织器结构，在单径瑞利衰落信道（ 100 d f Hz = ）下，采用理 想信道估计，仿真并绘出该系统在有无交织、不同译码方式（硬判决和 软判决）时，在不同 0 b EN下的信源误比特率曲线，并进行分析。 3. 改变交织器结构，选择三种不同的交织深度（自行决定），在单径瑞利衰 落信道（ 100 d f Hz = ）下，仿真并绘出该系统在不同交织长度时，在不 同 0 b EN下的信源误比特率曲线，并进行分析。(Build a BPSK + encoding + interleaving simulation communication link, and analyze the different translations under different channel conditions
The bit error rate performance of the code algorithm. Based on MATLAB, BPSK + convolutional coding + interleaved communication transceiver link is built,
The simulation parameters are as follows: 1) source bit rate: 100 b r Kbps = 2))
- 2020-05-15 12:24:37下载
- 积分：1
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third_-octave
采用带通滤波法，对信号进行1/3倍频程分析。程序带详细注释。(no english)
- 2020-11-08 14:09:47下载
- 积分：1
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Matlab files for various types of beamforming
Matlab files for various types of beamforming for custom 1D, 2D and 3D
- 2020-11-23 22:39:33下载
- 积分：1
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osyk4
实现两台PC机的串口通信,很好用,经编译无错误()
- 2018-03-28 21:42:58下载
- 积分：1
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IEC104_Tool
104规约调试工具，模拟104主控站，方便104规约的理解(104 Statute of the debugging tools, analog 104 master station to facilitate the understanding of the Statute of 104)
- 2012-07-02 21:33:55下载
- 积分：1
