Description: This program shows the distributions of the co-channel interference in forward and reverse link in the cellular mobile system with cluster size N, when the mobile subscriber (MS) is at random positions of a cell. Platform: |
Size: 2639 |
Author:conan |
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Description: This program shows the distributions of the co-channel interference in forward and reverse link in the cellular mobile system with cluster size N, when the mobile subscriber (MS) is at random positions of a cell. -This program shows the distributions of the co-channel interference in forward and reverse link in the cellular mobile system with cluster size N, when the mobile subscriber (MS) is at random positions of a cell. Platform: |
Size: 3072 |
Author:conan |
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Description: 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. Platform: |
Size: 2048 |
Author:mame |
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Description: ,用VERILOG语言实现16QAM的数字调制的程序，已经在ISE10.1版本中调试通过
-The introduction of cellular technology greatly expanded the efficiency of frequency use of mobile phones. Rather than exclusively allocating a band of frequency to one telephone call in a large geographic area, a cell telephone breaks down a geographic area into small areas or cells. Different users in different (non-adjacent) cells are able to use the same frequency for a call without interference Platform: |
Size: 908288 |
Author:韩鹏 |
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Description: 本系统具有实现细胞识别等相关功能，主要有以下功能：通过阈值设定进行图像的直方图显示，手动选取或手动去除干扰点，图像平滑，还有一些简单的图处理的功能，如腐蚀、膨胀、边缘的提取或区域提取的显示，最后还可以统计出图像中细胞的个数，以及识别出最大最小的细胞。直接运行就可以，功能一目了然。-The system has achieved recognition and other related cellular functions, mainly in the following features: the threshold set by the image' s histogram display, manually select or manual removal of interference points, image smoothing, there are some simple graph handling functions, such as erosion, dilation, edge extraction, or extraction of the display area, and finally to the statistics of the number of cells in the image and identify the maximum and minimum of the cells. Can be run directly, functions at a glance. Platform: |
Size: 774144 |
Author:zouwei |
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Description: Revised and enlarged version that discusses how to design a mobile communications system. Comprehensively examines the mobile radio environment. Covers prediction of propagation loss, calculation and methods of reducing fades, interference, frequency plans and associated schemes, design parameters, signaling and channel access, cellular CDMA, microcell systems, and miscellaneous related systems. Contains chapter-by-chapter references and problems. Common terms and phrases:bit-error rate CDMA cell site co-channel interference coherence bandwidth diversity scheme FDMA microcell mobile unit path loss Rayleigh fading Platform: |
Size: 4662272 |
Author:shahram |
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Description: The signal received by a user over the forward link in such a high data rate system contains interference from the neighboring base stations. we note that the strength of this interference is a function of the network load in the neighboring cells. we obtain an expression for the received SINR (Signal to Interference and Noise Ratio) as a function of the traffic load in the interfering cells. Using this result, we propose an improvement to the SINR estimation scheme that is implemented in the current cellular data network. The proposed scheme provides a more accurate estimate of the user SINR by taking better account of the contribution of inter-cell interference. It builds on top of the current SINR measurement scheme by using a combination of pilot measurement and traffic load measurement-The signal received by a user over the forward link in such a high data rate system contains interference from the neighboring base stations. we note that the strength of this interference is a function of the network load in the neighboring cells. we obtain an expression for the received SINR (Signal to Interference and Noise Ratio) as a function of the traffic load in the interfering cells. Using this result, we propose an improvement to the SINR estimation scheme that is implemented in the current cellular data network. The proposed scheme provides a more accurate estimate of the user SINR by taking better account of the contribution of inter-cell interference. It builds on top of the current SINR measurement scheme by using a combination of pilot measurement and traffic load measurement Platform: |
Size: 1024 |
Author:suresh |
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Description: The signal received by a user over the forward link in such a high data rate system contains interference from the neighboring base stations. we note that the strength of this interference is a function of the network load in the neighboring cells. we obtain an expression for the received SINR (Signal to Interference and Noise Ratio) as a function of the traffic load in the interfering cells. Using this result, we propose an improvement to the SINR estimation scheme that is implemented in the current cellular data network. The proposed scheme provides a more accurate estimate of the user SINR by taking better account of the contribution of inter-cell interference. It builds on top of the current SINR measurement scheme by using a combination of pilot measurement and traffic load measurement-The signal received by a user over the forward link in such a high data rate system contains interference from the neighboring base stations. we note that the strength of this interference is a function of the network load in the neighboring cells. we obtain an expression for the received SINR (Signal to Interference and Noise Ratio) as a function of the traffic load in the interfering cells. Using this result, we propose an improvement to the SINR estimation scheme that is implemented in the current cellular data network. The proposed scheme provides a more accurate estimate of the user SINR by taking better account of the contribution of inter-cell interference. It builds on top of the current SINR measurement scheme by using a combination of pilot measurement and traffic load measurement Platform: |
Size: 1024 |
Author:suresh |
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Description: 蜂窝移动通信系统中的同频干扰仿真。旨在找到簇大小为N时，无线移动蜂窝系统中同频干扰的分布。-Co-channel interference in cellular mobile communication system simulation. To find the distribution of cluster size N, wireless mobile cellular systems in the same frequency interference. Platform: |
Size: 2048 |
Author:刘芊 |
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Description: 你所在的移动通讯公司计划用微波发射器传送通话信号，为了以最优信号建立一个蜂窝通信网络需要考虑诸多因素：如地形，通信模式，无线电噪音源等。由于计划服务的3个地区主要为平原，基本没有干扰源，所以考虑的重点是通信模式。投资方为你提供的资源可以建造10个发射器用于通信，每个发射器可以同时处理200个呼叫信号并能可靠地覆盖一平方英里的范围。你还有关于3个地区每5*5英里的市场统计数据可以利用，这些数据预示了3个重要时段的通信需求：
工作日的上午8：30，此时进入Flat Spot市的人流达到高峰。
工作日的上午11：00，此时业务通话达到高峰。
星期六的中午，郊区通信达到高峰。
由于只有10个发射器无法覆盖整个地区，所以你需要编写程序对呼叫需求数据进行分析，以便发射器的配置能够为最大数量的潜在客户提供服务。-The mobile communications company where you plan to use a microwave transmitter to send a CALL signal, the signal in order to establish an optimal cellular communication networks need to consider many factors: such as topography, communication mode, radio noise sources. Since planning services three areas are mainly plain, basic no interference source, so consider focused mode of communication. Investors to provide you with the resources to build 10 transmitters for communication, each transmitter can handle 200 call signal can be reliably cover a square mile range. You have about three regions 5* 5 miles per market statistics are available, these data indicate the three major periods of communication needs:
Weekdays 8:30 am, this time into Flat Spot City traffic peak.
11:00 am weekdays, when business calls peaked.
Saturday at noon, suburban traffic peak.
Since only 10 transmitters can not cover the whole area, so you need to write a program to analyze t Platform: |
Size: 4096 |
Author:水上飘 |
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Description: Here we prove that as the tier number and path loss factor increases ,The SIR (Signal to Interference Ratio) also increases!
Consider a cellular system with hexagonal cells & cluster size N. Platform: |
Size: 27648 |
Author:Ashfia Diya |
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Description: 有关小区之间的蜂窝通信，消除小区间的干扰，通过仿真可以得出结论！-About the cellular communication between community, eliminate interference between zones, can come to the conclusion through the simulation！ Platform: |
Size: 5120 |
Author:杜中涛 |
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Description: 大唐移动关于解决蜂窝移动通信中的同频干扰的解决方案-Solution of the same frequency interference in cellular mobile communication Platform: |
Size: 647168 |
Author:王莫尘 |
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Description: One of the major challenges which prevents the coordinated multipoint (CoMP) communications concept from being widely deployed in new cellular systems is timing synchronization. In order to achieve the gains promised by CoMP systems, the user equipments’ (UEs) signals in uplink (UL) or the base stations’ (BSs) signals in downlink (DL) should be synchronized such that the time difference of arrivals (TDOAs) do not exceed the cyclic prefix (CP) length of the transmitted signals; Otherwise the system suffers from unavoidable integer time offsets. These offsets lead to asynchronous interference in terms of inter-carrier, inter-block and inter-symbol interference (ISI). This limits the percentage of area within a cell which can be covered by cooperation and imposes an upper bound on this area. In this paper, we investigate this problem in the UL and by using geometrical and semi-analytical approaches, we define this upper bound. Also, by characterizing an accurate mathematical model for the asynchronous interference in Rayleigh fading channels, we were be able to employ a standard MMSE-based receiver that mitigates this interference. Furthermore, a typical joint channel and delay estimation block is incorporated into the receiver to examine its performance with estimation errors. Platform: |
Size: 1869319 |
Author:ahamza |
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