PWM_svpwm

基于DSP芯片TMS32028335的ADC/DMA编程，ADC将采集到的数据通过DMA寄存器存放到外部RAM中，以便于分析数据。(Based on DSP chips TMS32028335 the ADC/DMA programming, ADC will store the collected data to an external RAM through DMA registers, in order to analyze the data.)

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：  服从瑞丽分布的多普勒频移的MATLAB仿真经典(MATLAB Simulation Classic of Doppler Frequency shift following Rayleigh Distribution)

说明：  对原始信号进行EMD分解及包络解调，得出包络解调谱，分析出故障频率(The original signal is decomposed by EMD and demodulated by envelope. The spectrum of envelope demodulation is obtained and the fault frequency is analyzed.)

本程序是以dsp28335为基础的，对ECAP 模块的程序设计(This procedure is based dsp28335 based on ECAP Programming Module)

模拟空间多孔介质,用matlab三维曲面重构。(The porous media in the space is simulated, and the three-dimensional surface is reconstructed.)

使用 DMA 实现DSP 28335 的多路AD采集 。(Multi-channel AD acquisition of DSP 28335 is realized by DMA.)

使用matlab进行毫米波信道模型仿真，很棒的源码(Millimeter-wave channel model simulation using matlab, great source code)

说明：  基于matlab的QPSK调制与解调程序(QPSK modulation and demodulation)

基于模拟退火算法的光学模式转换，为模分复用一种高效转换算法。(Based on the optical mode conversion of simulated annealing algorithm, a high efficiency conversion algorithm is used for modular division multiplexing.)