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公交非接触IC卡读写器的应用设计
公交非接触IC卡读写器的应用设计采用PHILIPS公司的Mifare卡作IC卡，设计以射频技术为核心，以单片机为控制器的IC卡读写器在公交自动收费系统中的应用。制作的IC卡读写器可以实现制卡、售卡、自动收费等功能，具有安全、实用、方便、快捷、可靠性高的特点，解决了城市公共交通服务行业既频繁又琐碎的收费管理问题，有广泛的应用前景。(Bus non-contact IC card reader applications designed using the Philips Mifare cards for IC cards, designed to RF technology as the core, microprocessor controller IC card reader automatically charges the transit system applications. The production of IC card reader card system can be achieved, A file, automatic charges and other functions, is safe, practical and convenient, fast and high reliability features to solve the urban public transport sector is also frequent charges trivial issues, a broad range of applications.)
- 2005-08-12 10:21:07下载
- 积分：1
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ModbusPollCS
某智能设备公司开关量采集系统（Modbus RTU），很不错哦！对于该类设备基本上都可以通用，只是“寄存器地址”不一样。我就参照该源程序写了一款SOS应急呼叫系统、酒店客房插卡取电、退房呼叫系统等。保证原创，独一无二。(A smart device switch acquisition system (Modbus RTU), very good, oh! Can be generic, such equipment is basically just not the same register address. I refer to the source Admission card, write a SOS emergency call system, hotel rooms, check out the call system. Guaranteed original, unique.)
- 2020-12-12 11:59:16下载
- 积分：1
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BPSK调制仿真
bpsk调制仿真，可直接用
1、数字调制方法
数字调制就是把数字基带信号的频谱搬移到高频处，形成适合在信道中传输的带通信号。基本的数字调制方式有振幅键控（ASK）、频移键控（FSK）、绝对相移键控（PSK）、相对（差分）相移键控（DPSK）。在接收端可以采用想干解调或非相干解调还原数字基带信号。
数字信号的传输方式分为基带传输和带通传输。然而，实际中的大多数信道（如）无线信道具有丰富的低频分量。为了使数字信号在带通信道中传输，必须用数字基带信号对载波进行调制，以使信号与信道的特性相匹配。(1, digital modulation method
Digital modulation is the transfer of the spectrum of a digital baseband signal to a high frequency to form a bandpass signal suitable for transmission in the channel. The basic digital modulation methods are amplitude keying (ASK), frequency shift keying (FSK), absolute phase shift keying (PSK), and relative (differential) phase shift keying (DPSK). At the receiving end, the digital baseband signal can be restored by using dry demodulation or non-coherent demodulation.
Digital signal transmission methods are divided into baseband transmission and bandpass transmission. However, most channels in practice, such as wireless channels, have rich low frequency components. In order for a digital signal to be transmitted in a band channel, the carrier must be modulated with a digital baseband signal to match the signal to the characteristics of the channel.)
- 2019-05-28 10:46:01下载
- 积分：1
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MODBUS VC
说明： 基于modbus rtu封装的通讯协议，很好用(Communication protocol based on Modbus RTU encapsulation)
- 2019-11-09 09:48:31下载
- 积分：1
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li2
它是以概率统计理论为基础，依据大数定律（样本均值代替总体均值），利用电子计算机数字模拟技术，通过不断产生随机序列来模拟事件的过程，来解决一些很难直接用数学运算求解或其他方法不能解决的复杂问题的一种近似算法，它既可模拟随机事件，也可模拟确定性事件。(It is based on the theory of probability and statistics, based on the law of large numbers (the mean of sample instead of the average), and using the digital simulation technology of electronic computer to simulate the process of events by constantly generating random sequences to solve some complicated problems which are difficult to be solved directly by mathematical calculation or by other methods. Like algorithm, it can simulate both random events and deterministic events.)
- 2018-07-05 10:10:18下载
- 积分：1
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powertossimz-May-19-2010.tar
Short hash based signature for wireless sensor network Research papers AVRORA power tossim
- 2012-03-30 18:48:41下载
- 积分：1
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GFSK
GFSK调制通信系统误码率统计，非常有借鉴价值(GFSK modulation communication system bit error rate statistics, the very reference value)
- 2011-05-04 17:22:30下载
- 积分：1
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Systemview-software-simulation
Systemview动态系统仿真软件是为方便大家轻松的利用计算机作为工具，以实现设计和仿真工作。它特别适合于无线电话（GSM,CDMA,FDMA,TDMA)和无绳电话，寻呼，机和调制解调器与卫星通信（GPS,DBS,LEOS)设计。能够仿真( 等）DSP结构，进行各种时域和频域分析和谱分析。(Systemview dynamic system simulation software is easy for us to facilitate the use of computers as a tool to achieve the design and simulation work. It is especially suitable for wireless phone (GSM, CDMA, FDMA, TDMA) and cordless telephones, paging, machine and modem and satellite communication (GPS, DBS, LEOS) design. To simulation (and other) DSP structure, various time domain and frequency domain analysis and spectral analysis.)
- 2011-05-29 16:27:53下载
- 积分：1
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Optisystem中MatlabComponent模块的扩展应用
通过一个光相位调制器的实例，介绍利用Optisystem 中Matlab Component组件联合M atlab实现用户自定义光学组件的方法。对相位调制基本原理、相位调制器理论模型和实现模型的Matlab代码进行分析，介绍如何将用户自定义器件功能代码关联Matlab Component组件进行仿真，并利用自定义的相位调制器对理论分析进行验证。(Through an example of an optical phase modulator, this paper introduces the method of implementing user-defined optical components by using Matlab Component component in Optisystem combined with M atlab. The basic principle of phase modulation of the phase modulator, theoretical model and implementation model of Matlab code analysis, describes how to simulate the user device function code associated Matlab Component components, and the theoretical analysis was verified by using custom phase modulator.)
- 2020-11-28 11:49:28下载
- 积分：1
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uwbmultiuserdetection
关于超宽带多用户检测的大家可看看，很好的程序(on Ultra-Wideband Multi-User Detection you can see, very good procedures)
- 2021-05-09 15:58:35下载
- 积分：1
