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aaaa
把地理区域分成一个个小区，蜂窝系统在该区域内提供无线覆盖。把可用的频谱分成很多信道，每个小区分配一组信道。使用频分双工（FDD）。在小区间进行频率利用，N个小区构成一个簇，簇间进行频率复用。定义了传播特性（信道参数）以及同频小区的位置。信道的参数包括：小区半径，路径损耗指数，以分贝为单位的对数正态阴影的标准差，基站发射功率级，移动台发射功率级，每个小区的扇区数，扇区化天线的正反向比，要仿真的瞬时位置的组数，同频干扰阈值。(To a geographical area is divided into small areas, cellular systems in the region to provide wireless coverage. The available spectrum is divided into multi-channel, each plot the distribution of a group of channels. The use of frequency division duplex (FDD). In the district between the frequency of use, N plots constitute a cluster, cluster between frequency reuse. The definition of the propagation characteristics (channel parameters), as well as with the frequency of residential location. Channel parameters include: cell radius, path loss index to decibels for units Lognormal shadow of the standard deviation, the base station transmitter power level, mobile station transmitting power level, the number of sectors in each district, sector of the antenna the pros and cons to the ratio, to the transient simulation of the group a few positions, the same frequency interference threshold.)
- 2009-01-08 19:02:48下载
- 积分：1
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QPSK
To understand the transmission scheme for QPSK modulation.
To design a simple transceiver structure operating in a noisy channel.
- 2009-10-18 18:50:57下载
- 积分：1
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ieee14
电力系统14节点模型，用于计算电力系统潮流计算(Power System 14 node model, used to calculate the power flow calculation)
- 2020-12-02 16:39:25下载
- 积分：1
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shebeixunjian
说明： 设备巡检操作系统
本程序是专门为某电厂开发的设备巡检系统，无需更改，便可以直接应用到实际中。
1、本程序可免费使用及修改。
2、本程序使用第三控件fastReport,Vclskin2.68,MsComm等组件(控件)。
有关使用问题请和本人联系。qq：3691202
(equipment Inspection procedures of the operating system specifically for the development of a power plant equipment inspection system without changes, it can be applied directly to the practice. One, the procedure is free to use and modification. 2, the procedures use the third component fastReport, Vclskin2.68, MsComm other components (controls). The use of links and I requested. Qq : 3691202)
- 2006-03-14 14:37:32下载
- 积分：1
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DF_fading
DF中继系统衰落情况下的最大比合并误码率仿真(Maximum ratio combined bit error rate simulation in DF relay system fading)
- 2018-03-26 17:02:49下载
- 积分：1
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Turbo_encode_decode
说明： Turbo码编译码的matlab源代码，包括logMAP算法与SOVA算法。可设置信道SNR参数，帧长度，删余系数等。(Turbo Codes Encoding and Decoding of the matlab source code, including logMAP algorithm and SOVA algorithms. Parameters can be set to channel SNR, frame length, deleted I coefficient.)
- 2010-03-17 19:03:22下载
- 积分：1
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OFDM_01
基于SIMULINK的完整OFDM系统，包括RS信道编码，交织，多种方式调制解调，插入导频，串并变换，信道估计，信道均衡等关键技术。(Based on SIMULINK complete OFDM system, including RS channel coding, interleaving, a variety of ways modulation and demodulation, insertion pilot, serial and parallel conversion, channel estimation, channel equalization and other key technologies.)
- 2017-04-19 20:02:18下载
- 积分：1
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ydn108_V5.2
说明： V5.2接口一致性测试规范，是V5.2接口测试的指导性文件，对V5开发人员有较大帮助(V5.2 interface conformance test specification, V5.2 interface test the guiding document, the right V5 developers have more help)
- 2006-03-07 18:22:41下载
- 积分：1
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sms
SMS短消息传输系统的程序代码，应用高级语言编写(SMS transfer systems)
- 2009-06-02 18:39:13下载
- 积分：1
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HFSS 左手材料仿真源文件模型
说明： 用HFSS仿真的左手材料源文件，完整，唯一。(The left-hand material source file of HFSS simulation is complete and unique.)
- 2021-01-24 16:38:39下载
- 积分：1
