pegasis

这是一个基于空时分组编码的MIMO_OFDM通信系统的仿真设计。 此系统包括QPSK调制解调，IFFT调制，空时编解码，基于训 练符号的信道估计等通信模块。(This is a simulation design of a MIMO_OFDM communication system based on space time block coding. The system includes QPSK modulation and demodulation, IFFT modulation, space-time codec, and training based on training. A communication module, such as the channel estimation of a symbol.)

3g无线网络规划方法，WCDMA无线小区规划(3g wireless network planning, WCDMA Cell Planning)

实现三菱PLC与上位机MC协议通讯，二进制或者ASCII均可。(Implementation of protocol communication between MITSUBISHI PLC and host computer MC)

用于监控PLC，针对的是modbus协议(monitoring PLC with modbus protocol)

book test book test book

Dopod 838官方拆机及维修手册,很详细的说明，照着他一步一步拆，很简单的，我的手机坏了就是照他拆了修的。(Dopod 838 official TBM Break-down and maintenance manual, a very detailed explanation, he told a step-by-step demolition very simple, I had a bad cell phone as he was taking off the surface.)

OFDM(正交频率调制)实现多载波调制基本思想是将带宽信道分解成许多并行的窄子信道，是每个子信道的想干带宽，从而实现平稳衰落。搭建了完整的OFDM信道链路系统，运用三种不同的信道估计方法(LS信道估计、DFT信道估计、Improved-DFT信道估计)，并对AWGN理想信道和衰落信道误码情况进行了仿真和比较。(OFDM (Orthogonal Frequency Modulation) multicarrier modulation basic idea bandwidth channel is decomposed into a number of parallel narrow subchannels, each subchannel wanted bandwidth, in order to achieve a smooth fading. Build a complete OFDM channel link system, the use of three kinds of different channel estimated method (LS channel estimated, to the DFT letter Tao estimates, Improved-the DFT letter Road estimated), and AWGN ideal letter Road and fading channel bit error situation conducted a simulation and comparison .)

只是在闲暇时发现网络上面根本就没有完全公开或者使用方便的程序,(Is only found in your spare time on the network did not fully open or easy to use program,)

QPSK定时同步代码，采用Gardner定时同步算法，Farrow插值算法(QPSK timing synchronization code, using Gardner timing synchronization algorithm, Farrow interpolation algorithm)

在高斯白噪声信道和莱斯信道下调制方式为qpsk的基本通信系统的误码率仿真 (In the Gaussian white noise channel and Rice channel qpsk modulation method is the basic communication system BER simulation)