design

convolution and reed solomon coding for bpsk

document for OFDM system

说明：  matlab仿真LDPC码，对采样点数进行PPM编码，此代码加了保护时隙(The LDPC code is simulated by matlab, and the sampling points are encoded by PPM, which adds protection time slot.)

Performace analysis of Zero Forcing detection in (2,2) MIMO system using 4 QAM modulation in Rayleigh Flat Fading Channel

协作多点传输技术及其原理，对CoMP技术中的协作簇选择、CoMP用户划分、用户传输方案及预编码做出了介绍，通过仿真对比得到采用CoMP技术的系统性能增益(LTE CoMP Research)

OFDM中降低峰均比的方法，将传统的SLM法，改进的SLM法和限幅加改进SLM法进行比较(Compare OFDM PAPR reducing methods in the traditional SLM method, improved SLM method and limiter plus improved SLM method)

用UWB技术实现定位的程序，定位精度高达10cm，STM32作为主控单元(UWB technology to achieve positioning procedures, positioning accuracy of up to 10cm, STM32 as the main control unit)

Asynchronous Transfer Mode (ATM) is a connection-oriented, packet-switched technology. The packets that are switched in an ATM network are of a fixed length, 53 bytes, and are called cells. The cell size has a particular effect on carrying voice traffic effectively. The ATM Adaptation Layer (AAL) sits between ATM and the variable-length packet protocols that might use ATM, such as IP.

程序使用了自相关性和互相关性较好的gold码作为扩频序列，直扩，扩频增益设置为31，模拟用户数为4(Program uses a self-correlation and cross-correlation of the better gold code as spreading sequence, direct expansion, spreading gain is set to 31 to simulate the number of users of 4)

信源产生、信道编码、调制、信道传输、解调、信道译码、差错比较等通信过程的Simulink仿真方法。分析几种调制方式（2FSK、2PSK、QPSK、16PSK、16QAM）在不同信噪比下的通信质量。(Generated source, channel coding, modulation, channel transmission, demodulation, channel decoding, error comparison of the communication process of the Simulink simulation. Analysis of several modulation (2FSK, 2PSK, QPSK, 16PSK, 16QAM) in different SNR communication quality.)