modulation

Smoothing Filter-based Intensity Modulation a spectral preserve

很久很久之前，收藏的一份 清华大学 p2p相关的研究文献，希望对有需要的人有帮助，非常难得(Long, long ago, a collection of P2P-related research literature collected by Tsinghua University, hoping to help people in need, is very rare.)

MATLAB设计各种类型的IIR数字滤波器,掌握IIR数字滤波器的设计方法和步骤(MATLAB design of various types of IIR digital filter, master IIR digital filter design methods and steps)

QPSK平台上的载波频偏经典估计算法实现，和估计出来之后进行补偿然后解调，统计误码率(QPSK frequency offset error data MSE SNR)

Logika 25s controllers Modbus alarm codes documentation

提供了用MATLAB进行数字图像处理、压缩感知、多种信号重建算法、多种熵编码的MATLAB代码。(The MATLAB codes for digital image processing, compression sensing, multiple signal reconstruction algorithms and multiple entropy coding are provided.)

仿真电力线信道五类噪声，有matlab程序和文档说明。(The simulation of power line channel noise.)

说明：  2. 关于无线信道的多普勒谱，请回答以下问题： (1) 在某些无线信道中，多普勒频移会引起无线信道输出信号的混叠。请描述产生混叠的各种原因； (2) 无线信道中的多普勒谱有一种经典谱(classic spectrum)，请解释产生这种谱形状的机理； (3) 请用Simulink工具编写代码(S-Function方式)，产生一单径瑞利信道，其多普勒谱为经典谱，其中移动速率为120km/h。并请描述：自己用计算机产生的经典谱是正确的依据。(2. Regarding the doppler spectrum of the wireless channel, please answer the following questions: (1) in some wireless channels, doppler frequency shift will cause aliasing of the output signals of the wireless channel.Describe the various causes of aliasing; (2) there is a classic spectrum in the doppler spectrum in the wireless channel, please explain the mechanism of producing this spectrum shape; (3) please use Simulink tool to write code (s-function mode) to generate a single-path Rayleigh channel, whose doppler spectrum is the classical spectrum, in which the moving rate is 120km/h.And please describe: your own computer generated classical spectrum is the correct basis.)

在OPNET上搭建场景，仿真接入算法，使用的是S-ALOHA接入算法，以仿真吞吐量、时延等性能(Build a scene on OPNET, simulation access algorithm, using the S-ALOHA access algorithm to simulate the throughput, latency and other performance)

基于DEVC++的手机模拟系统，文件共计1500行，(Based on DEVC++ Analog mobile phone systems, document a total of 1500 lines,)