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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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danshuitingqishifan
针对单水听器的时间反转镜，给出了时反结果。(For a single hydrophone time reversal mirror, given the anti results.)
- 2014-06-11 21:37:53下载
- 积分：1
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chinamobile
网页开发 内含项目<中国移动业务管理系统>(Web Development includes projects " China Mobile Business Management System> )
- 2011-05-20 17:28:13下载
- 积分：1
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JavaJICQ)
说明： java编写完成的简单通信工具。类似于ICQ(prepared a simple communications tool. Similar to ICQ)
- 2006-03-20 13:49:36下载
- 积分：1
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qpsk_dsp_code
说明： QPSK通信调治与解调DSP开发C++代码，可以在TI DSP上实现(QPSK modulation and demodulation communications DSP development of C code can achieve TI DSP)
- 2006-03-20 20:23:13下载
- 积分：1
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GNSS_SDR
说明： 我在美国公司用的CA code GPS toolbox(this is matlab toolbox I write and use in my company for simulating a CA code in GPS)
- 2009-08-10 09:22:41下载
- 积分：1
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channel_esti_em730a
代码为实现EM算法进行ofdm调制信号进行信道估计的仿真代码(source codes simulate the channel estimation using em algorithm)
- 2009-03-22 11:28:47下载
- 积分：1
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m
说明： M序列的调制 ，很好用 ，大家可以下来看看。(M sequence modulation, a very good use, we can look down.)
- 2008-06-17 10:24:46下载
- 积分：1
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df
说明： 协作通信中DF模式。程序中也只仿了一个中继时的编码转发协作形式。(cooperative diversity DF)
- 2010-03-03 14:43:03下载
- 积分：1
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wvtf
说明： 重排二次型时频分布应用例程，对信号进行频率归一化处理，时频分布和重排(Rearrangement of quadratic time-frequency distribution of the application of routine, the signal frequency normalized, time-frequency distribution and rearrangement)
- 2008-11-19 16:13:00下载
- 积分：1
