ddc lowpass

说明：  西门子STEP7，费斯托阀岛的GSD文件，硬件组态使用(SIEMENS STEP7, GSD File of Fisto Valve Island, Hardware Configuration Use)

这个程序用蒙特卡洛法计算了单小区用户利用D2D通信解码转发中继选择情况下的误码率(This program calculates the bit error rate of single cell users using D2D communication decode and forward relay selection)

本构方程，用于高温粘塑性模型。的的疯狂了开发法公关部发的风风光光(umat ffgdkfjoiefkdfj)

VC （MODBUS协议）上位机程序VC （MODBUS协议）上位机程序(VC （MODBUS）)

PC与单片机通信的握手协议的建立，以及工业上单片机控制继电器的实例(PC with Single-chip communication handshake agreement set up, as well as industry examples Singlechip Control Relay)

OFDM系统包括OFDM系统的调制解调，IFFT及FFT变换，保护间隔的加入对系统性能的改善，以及多径干扰、高速移动对系统误码率的影响。(The OFDM system includes modulation and demodulation of the OFDM system, IFFT and FFT transformation, the improvement of the protection interval to the system performance, and the influence of multipath interference and high-speed mobile on the system BER.)

此代码是关于BPSK-OFDM信号调制代码，简单编码叙述者整个调制过程，可直接运行出结果(BPSK-OFDM signal modulation code)

本论文以OFDM系统为基础，介绍了OFDM系统的基本原理，以及使用OFDM技术的优势所在，并且展望了今后的无线移动技术的发展前景。在简单介绍OFDM原理的同时，着重阐述了OFDM系统在不同信道环境和不不同实现方式下的误码性能。主要包括了OFDM系统在加性白高斯信道，在加性白高斯信道和多径干扰两种不同信道环境下系统的误码性能，其中后者还研究了系统在有保护间隔与无保护间隔的误码性能比较。在理论分析的基础 (This thesis is based on the OFDM system, the basic principle of the OFDM system, as well as the advantages of using OFDM technology, and future prospects for the development of future wireless and mobile technologies. OFDM principle in brief, focusing on the BER performance of OFDM systems under different channel conditions and different implementations. Including OFDM system in additive white Gaussian channel, additive white Gaussian channel and multipath interference of two different channel environment, the system BER performance, the latter of which also studied the system in a protected interval without guard interval BER performance comparison. The basis of theoretical analysis)

BPSK调制，采用（15,11）汉明码对信号编码；然后对信号加噪，解调，译码。(BPSK modulation (15,11) Hamming code signal encoding then added noise to the signal, demodulation, decoding.)

说明：  TCP/IP通信截取指定IP和port的数据包(packet sniffer)