OFDM_01

把地理区域分成一个个小区，蜂窝系统在该区域内提供无线覆盖。把可用的频谱分成很多信道，每个小区分配一组信道。使用频分双工（FDD）。在小区间进行频率利用，N个小区构成一个簇，簇间进行频率复用。定义了传播特性（信道参数）以及同频小区的位置。信道的参数包括：小区半径，路径损耗指数，以分贝为单位的对数正态阴影的标准差，基站发射功率级，移动台发射功率级，每个小区的扇区数，扇区化天线的正反向比，要仿真的瞬时位置的组数，同频干扰阈值。(To a geographical area is divided into small areas, cellular systems in the region to provide wireless coverage. The available spectrum is divided into multi-channel, each plot the distribution of a group of channels. The use of frequency division duplex (FDD). In the district between the frequency of use, N plots constitute a cluster, cluster between frequency reuse. The definition of the propagation characteristics (channel parameters), as well as with the frequency of residential location. Channel parameters include: cell radius, path loss index to decibels for units Lognormal shadow of the standard deviation, the base station transmitter power level, mobile station transmitting power level, the number of sectors in each district, sector of the antenna the pros and cons to the ratio, to the transient simulation of the group a few positions, the same frequency interference threshold.)

基于SIMULINK的完整OFDM系统，包括RS信道编码，交织，多种方式调制解调，插入导频，串并变换，信道估计，信道均衡等关键技术。(Based on SIMULINK complete OFDM system, including RS channel coding, interleaving, a variety of ways modulation and demodulation, insertion pilot, serial and parallel conversion, channel estimation, channel equalization and other key technologies.)

一个DQPSK信号接收与发送部分的软硬件设计。其中IF=70MHZ，信息速率=10MBS，采用带通信号采样技术，数字正交解调和调制技术。NCO频率分辨率为32位，相位分辨率为10位(A DQPSK signal reception and transmission part of the software and hardware design. Which IF = 70MHZ, information rate = 10MBS, the use of bandpass sampling technique, the digital quadrature demodulation and modulation techniques. NCO frequency resolution of 32, phase resolution of 10)

频谱分配算法，采用图着色的比例公平分配算法(Spectrum allocation algorithm, using the ratio of equitable distribution graph coloring algorithm)

数字基带传输系统的matlab仿真，用4种码型(Digital baseband transmission system matlab simulation, with four kinds of code-type)

cmpp3.0 最新实现 带spring功能(cmpp3.0 latest with spring function)

包括载波跟踪和伪码相位跟踪，用Matlab实现直接序列扩频信号的跟踪程序。(Including pseudo-code tracking and carrier phase tracking using Matlab implementation of direct sequence spread spectrum signal tracking procedures.)

在发射端发射大时宽、带宽信号，以提高信号的速度测量精度和速度分辨力，而在接收端，将宽脉冲信号压缩为窄脉冲，以提高雷达对目标的距离分辨精度和距离分辨力。(In order to improve the speed measurement accuracy and speed resolution of the signal at the transmitter, the wide pulse signal is compressed into a narrow pulse at the receiving end to improve the range resolution and range resolution of the radar.)

说明：  除了蚁群算法，可用于PID参数优化的智能算法还有很多，比如遗传算法、模拟退火算法、粒子群算法、人工鱼群算法，等等。(In addition to ant colony algorithm can be used to optimize the PID parameters there are many intelligent algorithms, such as genetic algorithms, simulated annealing algorithm, particle swarm optimization, artificial fish-swarm algorithm, and so on.)

这是一段求信息量的C++程序,对输入的一组数据进行求和,及最终算出其信息量和信道容量(This is for the amount of information for some of the C++ Procedures, a group of input data summation, and finally calculate the amount of information and channel capacity)