pracsim-3

巴特沃斯滤波器C语言实现，低通滤波器。IIR(Butterworth filter C language)

本程序计算了连续相位调制CPM的功率谱密度(The program calculates the continuous phase modulation CPM power spectral density)

实现了光通信系统的多径、以及不同信噪比下的通信链路信噪比仿真。其中包含OOK/PPM/DPPM/DHPIM/副载波调制(The simulation of communication link signal-to-noise ratio (SNR) of optical communication system under multipath and different signal-to-noise ratio is realized. It contains OOK/PPM/DPPM/DHPIM/ subcarrier modulation)

Abstract—In this paper, we study the joint estimation of inphase and quadrature-phase (I/Q) imbalance, carrier frequency offset (CFO), and channel response for multiple-input multipleoutput (MIMO) orthogonal frequency division multiplexing (OFDM) systems using training sequences. A new concept called channel residual energy (CRE) is introduced. We show that by minimizing the CRE, we can jointly estimate the I/Q imbalance and CFO without knowing the channel response. The proposed method needs only one OFDM block for training and the training symbols can be arbitrary. Moreover when the training block consists of two repeated sequences, a low complexity two-step approach is proposed to solve the joint estimation problem. Simulation results show that the mean-squared error (MSE) of the proposed method is close to the Cramer-Rao bound (CRB). Index Terms—MIMO OFDM, CFO, I/Q imbalance, channel estimation.

说明：  MIMO-OFDM系统降低PAPR的天线旋转取反算法(Antenna rotation inversion algorithm for reducing PAPR in MIMO-OFDM system)

分析了分别在瑞丽、莱斯、AWGN衰落信道、采用BPSK、QPSK、QAM调制方式情况下的EGC性能比较(The comparison of EGC performance under the conditions of Rayleigh, Rician, AWGN fading channels and using BPSK, QPSK and QAM modulation methods is analyzed.)

说明：  基于空间调制的matlab代码，可完整运行(Matlab code of wireless communication system based on spatial modulation)

说明：  实现压缩感知重构中的OMP算法。具有完整备注，需要自己生成信号来使用函数(OMP algorithm in compressed sensing reconstruction is implemented. With complete remarks, you need to generate your own signal to use the function)

说明：  ADMM算法 切普信号的参数估计问题 包括个数估计和频率估计(The parameter estimation of Chep signal based on ADMM algorithm includes number estimation and frequency estimation.)

光纤放大器模拟程序，包括泵浦功率、光纤增益、光纤长度等参数(fiber amplifier)