GA2

OFDM的QPSK及其调制matlab程序(OFDM-QPSK modulation matlab and its procedures)

说明：  实现turbo码编程，是matlab源程序。(matlab program of turbocoder)

本程序是对低密度奇偶校验码的校验矩阵的源程序，相信会对研究ldpc码的人会很有帮助的(This procedure is a low-density parity check matrix of code source, I believe that research on LDPC codes will be very useful)

这是一个用来用手机操控电脑上的ppt的一个源码，挺有意思的，可以用来做参考(thiao this is a android ffio fjdiofj fjia ofji afjifjidjifiroagjiorajpo)

仿真源码包括了多层异构蜂窝网络中基于齐次泊松点过程（HPPP）的建模方法，一篇介绍该模型的12年发表在IEEE trans的论文。以及传统六边形建模方法和信道增益矩阵的计算。(Simulation source code, including the multi-heterogeneous cellular networks based on homogeneous Poisson point process (HPPP) modeling method, a description of the model' s 12-year papers published in IEEE trans. And traditional modeling methods and hexagonal channel gain matrix calculation.)

SIGNAL DETECTION FOR SPECTRUM SENSING Spectrum sensing is a critical functionality in cognitive radio communications as it must be performed before allowing unlicensed users to access a vacant licensed band. Energy detector is also known as radiometer and it is most common method of spectrum sensing because of its low computational and implementation complexities. The coherent detector, also referred to as a matched filter, can improve detection performance if the primary transmitted signal, s, is deterministic and known a priori.

说明：  这个是64bit矩阵乘法实现代码，语言是verilog。(This is the 64 bit matrix multiplication implementation code, and the language is Verilog.)

不同GI长度的OFDM-QAM系统性能仿真(Performance simulation of OFDM-QAM systems with different GI lengths)

光纤通信系统中的相干光仿真，包括数字信号处理的全部过程和光纤信道的建模，针对16QAM的调制格式，带有Nyquist信号生成(Coherent light simulation in optical fiber communication system, including the whole process of digital signal processing and the modeling of optical fiber channel)

收集了华为五轮面试的经验，还有中兴通信的面试宝典，非常不错的资料 (Huawei five interviews to collect experience, and ZTE interview book, very good information)