ofdm_tr

说明：  实现ldpc的编译码功能，译码算法使用的对数域bp译码算法(LDPC codec realize the function of decoding algorithm used in log-domain decoding algorithm bp)

雷达LFM（线性调频信号）仿真程序，包括信号生成，脉冲压缩以及实际FLM回波信号处理。(radar LFM signal Processing)

说明：  Realizing the Quality of Service (QoS) in Software-Defined Networking (SDN) Based Cloud Infrastructure

DRM(Digital Radio Mondiale)系统采用OFDM调制方式， 引入了先进的信源信道编码和调制技术，使得AM波段的音频广播质量大大提高，在保持现有10kHz带宽时接近了FM广播的质量[5](DRM (Digital Radio Mondiale) system uses OFDM modulation, the introduction of advanced source-channel coding and modulation techniques, making AM-band audio broadcast quality greatly improved, while maintaining the existing 10kHz bandwidth close to the quality of FM broadcasting [5])

说明：  线性相位 FIR 低通、高通、带通和带阻滤波器的设计方法，频率采样设计法的基本概念和线性相位的实现方法。几种线性相位的特点，熟悉和掌握矩形窗、三角形窗、汉宁窗、海明窗、布莱克曼窗、凯塞窗设计 IIR 数字滤波器的方法，频率抽样设计法的线性相位的设计方法，并对各种线性相位的频率抽样法的设计给出调整和改进。 利用 MATLAB 进行各类 FIR 数字滤波器的设计方法。(The design method of linear phase FIR low pass, high pass, band pass and band stop filter, the basic concept of frequency sampling design method and the realization method of linear phase. Familiar with and master the design methods of IIR digital filter of rectangle window, triangle window, Hanning window, Heming window, Blackman window and Kaiser window, and the design methods of linear phase of frequency sampling design method, and adjust and improve the design of frequency sampling method of various linear phases. Matlab is used to design all kinds of FIR digital filters.)

siso信道模型，用于建立基础的点对点信道(SISO channel Model)

MSK和GMSK的simulink仿真，眼图，功率谱(MSK and GMSK the Simulink simulation, eye diagram, power spectrum)

OFDM上下行的链路仿真，很简单，解释的也很清楚，易懂(simulink ofdm,easy)

恒频恒压(CVCF)逆变电源的输出电压波形质量是衡量其性能的重要指标之一。文章采用一种重复控制和双闭环控制相结合的电压波形控制策略，以重复控制器提高逆变电源输出电压的稳态精度，减小总谐波畸变率；以双闭环控制器达到较快的动态响应速度。该方案在一台采用TMS320F240 DSP控制芯片的50 Hz三相PWM逆变器上得到验证。(Constant voltage constant frequency (CVCF) Inverter output voltage waveform quality is an important measure of its performance indicators. Paper using a repetitive control and the combination of double closed loop control voltage waveform control strategy to improve the repetitive controller output voltage inverter steady-state accuracy and reduce total harmonic distortion to achieve a faster dual-loop controller dynamic response speed. The program uses TMS320F240 DSP in a 50 Hz phase control chip PWM inverter has been to verify.)

说明：  单频信号经过多径时变信道后，输出信号的包络随时间随机起伏，输出信号的频谱从冲激谱变成一个窄带频谱。径数位20，变化频率从0—2HZ随机均匀抽取。(Single-frequency signal through time-varying multipath channel, the output signal envelope random fluctuations over time, the output signal from the impulse of the spectrum into a narrow-band spectrum spectrum. Digital Drive 20, changes in frequency from 0-2HZ uniform random samples.)