One-channel queuing system simulator (M/M/1)
* Arrival and service times are random and distributed exponetially.
*
* The simulator is time-slice-driven, i.e. the system model is being
* run at discrete time points, with constant increments deltaT.
* At each such time moment, program checks if a new item arrival or
* release has occurred during previus deltaT.
This m file analyzes a coherent binary phase shift keyed(BPSK) and a amplitude shift keyed(ASK) communication system. The receiver uses a correlator(mixer-integrator[LPF]) configuration with BER measurements comparing measured and theoretical results. The bandpass and low pass used in the receiver are constructed using z transforms.
This code converts a Galois Field array created usin GF(2^m) for a given primitive polynomial into a decimal array that can be used within typical .m file coding.
通用串行總線USB(Universal Serial Bus)是一種新型的微機總線接口規范。隨著客戶對系統數據采集速度要求的不斷提高，USB以其使用方便、易于擴展、速度快等優點而越來越多的應用于數據采集系統中。本文介紹了一種基于USB總線的數據采集系統的設計方法，采用PHILIPS公司的USB接口芯片PDIUSBD12與單片機AT89C51進行通信，并和PC機通信而編制出友善的設備應用程序。該系統用傳統的USB總線取代了RS232串行總線，通過對USB協議和設備構架的充分理解，對以單片機89C51和USB接口芯片PDIUSBD12為主的數據采集系統進行了硬件設計和軟件編程，并在此設計的基礎上給出相應的原理圖。硬件設計主要解決的是PDIUSBD12和ADC0809與單片機之
