Description: 用遗传算法解决通信中的TDOA问题
文件名 program
完成功能 求出在进行account_test次的试验中每一次的最优染色体，并且求出均值MV，和均方误差MSE
文件名 definition_constant( )
完成功能 对各个常量试验参数进行设定
文件名 main_program
完成功能 完成一次试验的计算
文件名 all_Noise
完成功能 计算TDOA值（由基站所测量的TDOA（受到噪声的干扰）)
文件名 gen_ini_pop_arr
完成功能 产生染色体矩阵pop_arr，矩阵的1，2行为估计的x，y坐标，矩阵的3，4行为0。-using genetic algorithms to solve the communication problems TDOA documents were obtained functional program completed during account_test meeting the test of the optimal every chromosome, and calculated average MV, and the mean square error MSE definition_constant file name () function to complete all regular Experimental parameters set main_program documents were completed functional testing of a complete calculation File Name all_Noise complete functional calculation TDOA value (measured from the base station TDOA (subject to noise interference )) File Name gen_ini_pop_arr have completed functional matrix pop_arr chromosome, the matrix acts estimated 1,2 x, y coordinates, and the matrix acts 3,4 0. Platform: |
Size: 2846 |
Author:田园 |
Hits:
Description: 用遗传算法解决通信中的TDOA问题
文件名 program
完成功能 求出在进行account_test次的试验中每一次的最优染色体，并且求出均值MV，和均方误差MSE
文件名 definition_constant( )
完成功能 对各个常量试验参数进行设定
文件名 main_program
完成功能 完成一次试验的计算
文件名 all_Noise
完成功能 计算TDOA值（由基站所测量的TDOA（受到噪声的干扰）)
文件名 gen_ini_pop_arr
完成功能 产生染色体矩阵pop_arr，矩阵的1，2行为估计的x，y坐标，矩阵的3，4行为0。-using genetic algorithms to solve the communication problems TDOA documents were obtained functional program completed during account_test meeting the test of the optimal every chromosome, and calculated average MV, and the mean square error MSE definition_constant file name () function to complete all regular Experimental parameters set main_program documents were completed functional testing of a complete calculation File Name all_Noise complete functional calculation TDOA value (measured from the base station TDOA (subject to noise interference )) File Name gen_ini_pop_arr have completed functional matrix pop_arr chromosome, the matrix acts estimated 1,2 x, y coordinates, and the matrix acts 3,4 0. Platform: |
Size: 3072 |
Author:田园 |
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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: 认知无线电能有效缓解无线电频谱资源匮乏问题，正交频分复用（OFDM）非常适合认知无线电系统。动态频谱资源分配是认知系统的一项重要功能。本文的目标就是最小化成本函数，这个函数考虑到主用户以及次用户的干扰功率。-Cognitive radio (CR) is a promising concept for improving the utilization of scarce radio spectrum resources. Orthogonal frequency division multiplexing (OFDM) is regarded as a technology which is well-matched for CR systems. Dynamic resource allocation is an important task in such systems. A novel resource allocation algorithm for multiuser OFDM cognitive radio system is presented in this paper. The objective is to minimize a cost function which takes into account the interference
power experienced by the primary user as well as the base station transmit power for secondary users given minimum bit rate requirements for each secondary user. Platform: |
Size: 201728 |
Author:洪波 |
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Description: 呼叫阻塞仿真
1 该系统与外界完全独立，无外界基站干扰，假设基站可提供的信道数为10。
2 呼叫的到达时间间隔和每次呼叫的服务时间服从负指数分布，参数分别为1/lamda_arrival和lamda_serve
-Call blocking and outside of the system simulation a fully independent, without outside interference the base station, assuming the base station the number of channels available for the 10.2 calls per call arrival interval and service time is negative exponential distribution, parameter were 1/lamda_arrival and lamda_serve Platform: |
Size: 1024 |
Author:高龙年 |
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Description: Abstract—2×2 unitary precoding based on receiver feedback
is applied alongside spatial multiplexing at the base station in
HSDPA (D-TxAA) when the mobile terminal supports MIMO
transmissios [1]. This precoding will influence achievable sumrate
of the MIMO channel if it influences the Signal-to-
Interference-plus-Noise Ratio (SINR) of streams at the receiver
(RX) output. We propose a set of MIMO HSDPA receivers, all
based upon a LMMSE chip-level matrix filter (equalizer) front
end, and introduce the notion of joint bias for the MIMO chip
equalizer. Statistical properties of the spatial model thus obtained
are exploited to analyze the performance of proposed MIMO
receivers. It is shown that precoding choice depends upon the
MIMO receiver and the extent of its impact depends on the
MIMO RX. Platform: |
Size: 195584 |
Author:ashish |
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Description: femto是目前解决中心基站服务量大、性能低的一个热点方式，该方式可以提供弱信号地方好的通信质量，本代码就同频防干扰做出设计，希望对读者有用-Centre for Settlement of femto base station is the service volume, low performance is a hot way, the way to where weak signals can provide good communication quality, the code to make the same frequency anti-interference design, hope to be useful reader
Platform: |
Size: 10240 |
Author:黄欣蕾 |
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Description:
SIC for OFDMA. The file has a figure for showing the effect of Successive interference canceller in an OFDMA system for an uplink transmission with 4 users transmitting in blocks of 4 subcarriers towards the base station. Platform: |
Size: 4096 |
Author:myinviziblebox |
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Description: 宽带OFDM系统多基站合作的干扰协调技术的研究，是学习软频率复用的一种补充文献。-Broadband OFDM multi base station system, coordination of technical cooperation of the interference, the soft frequency reuse of learning as a complement to the literature. Platform: |
Size: 604160 |
Author:李牧 |
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Description: 莱斯信道的仿真与建模，包含突发干扰的仿真，应用于手机信号与基站的通信。-Rice channel simulation and modeling, including simulation of burst interference, used in mobile phones and base station communication signal. Platform: |
Size: 3072 |
Author:yeyu |
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Description: 模拟行人在六角形基站中行走时，通信信号的强弱，各个基站对他的干扰-Analog pedestrians walking in the hexagonal base station communication signal strength, interference of each base station Platform: |
Size: 4096 |
Author:Ding GUo |
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Description: 研究了单基站功率约束条件下的多点协作多输入单输出干扰下行链路系统的和速率最大化非凸优化问
题。为有效求解和速率最大化优化问题，首先采用分层优化方法将和速率最大化优化问题分解成发射功率最小
化优化问题和单输入单输出干扰信道的和速率最大化优化问题 其次利用二阶锥规划优化方法求解发射功率最
小化优化问题 然后利用凸近似和几何规划方法求解单输入单输出干扰信道的和速率最大化优化问题 最后通
过交替求解这两个子优化问题，进而提出了一种新颖的单调协同多点波束成形算法 而且利用单有界序列原理
证明了所提算法的收敛性。数值仿真表明所提算法只需约四次迭代即可收敛到稳定点，而且所获得的最优性能
非常接近穷举搜索算法的最优性能。-Single base station power constraints under the multi-point collaboration and the rate of multiple-input single-output interference downlink system to maximize non-convex optimization problem. For maximizing the effective solving and rate optimization problem, first hierarchical optimization method to maximize the rate optimization problem into minimum transmit power optimization problem and the single-input single-output interference channel and rate maximization optimization problem Secondly, the second-order cone programming optimization method for solving the minimum transmit power optimization problem then using convex approximation and geometric programming method for single-input single-output interference channel and maximizing the rate optimization problem Finally, by alternately solving the two sub-optimization problems, and then put forward a novel monotonous collaborative multi-beamforming algorithm and the use of single-, bounded sequence principle that the convergence Platform: |
Size: 684032 |
Author:李腾飞 |
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Description: The model is built upon the assumption that the probabil-
ity distribution of available destinations among the bu ered frames at
the Base Station (BS) is approximately the same as the probability
distribution of the trac arriving to the BS, this is, the amount of
trac directed to each MN with respect to the total trac load. This
assumption leads to a simple, but accurate, queueing model for Multi-
user MIMO systems that accounts for the impact of a nite number of
active MNs in non-saturated conditions. The model is easily applicable
to any Multi-user MIMO scenario given that the probability density
function of the post-processing SINR (Signal to Interference and Noise
Ratio) for each MN is known. Platform: |
Size: 92160 |
Author:ImranKhan |
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Description: If SDMA is used on the downlink of a multi-user MIMO system,
either long-term or short-term channel state information
has to be available at the base station (BS) to faciliate the joint
precoding of the signals intended for the different users. Precoding
is used to efficiently eliminate or suppressmulti-user interference
(MUI) via beamforming or by using ”dirty-paper”
codes. It also allows us to performmost of the complex processing
at the BS which leads to a simplification of the mobile terminals.
In this paper, we provide an overview of efficient linear
and non-linear precoding techniques formulti-userMIMO
systems. The performance of these techniques is assessed via
simulations on statistical channelmodels, and on channels generated
by the IlmProp, a geometry-based channel model that
generates realistic correlations in space, time, and frequency. Platform: |
Size: 74752 |
Author:ImranKhan |
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Description: 该文在大量测试实验和理论分析的基础上，研究电磁波在楼内公共烟道的传输问题，分析公共烟道环境的特殊性以及影响电磁波传输损耗的因素。提出一种适用于楼宇集中净化物联网系统的基于SX1278的无线传输方案。该方案采用直接序列扩频调制来提高系统的抗干扰性能，采用截断二进制指数退避算法作为重传机制来解决节点信号冲突碰撞问题。通过在基站端采用时间片轮转调度，来保证计数的同步性和实时性。集成测试和实地测试结果表明，该方案很好地解决了烟道内无线信号的稳定传输问题，且丢包率和误码率较低，系统可靠性好。-On the basis of experimental and theoretical analysis of a large number of tests on the study of electromagnetic waves in the building of public flue transmission problems, analyze the particularity of public flue environment and factors affecting the electromagnetic transmission loss. Is proposed for building things centralized purification system based on wireless transmission scheme SX1278' s. The program uses direct sequence spread spectrum modulation to improve anti-interference performance of the system, using the truncated binary exponential backoff algorithm as the retransmission mechanism to resolve conflicts node signal collision. The base station side by using round-robin scheduling to ensure counting and real-time synchronization. Integration testing and field test results show that the program solves the problem of stable transmission of radio signals within the flue, and the packet loss rate and the error rate is low, better system reliability. Platform: |
Size: 758784 |
Author:jerry |
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Description: In millimetre wave (mm-wave) communications, hybrid precoding is
preferred which uses much less number of RF chains compared with
the number of antenna elements. The conventional method selects the
beamforming vectors at base station (BS) and the combining vectors
at user equipments (UEs) to maximise the received signal power.
However, in some specific scenarios, when UEs have strong and
highly correlated paths, referred to as collided UEs, they might share
the same beamforming vector at the BS leading to severe inter-user
interference. An enhanced beam selection algorithm is proposed to eliminate
the severe inter-user interference by reselecting the beamforming/
combining vector pairs for the collided UEs. Simulation results demonstrate
that the proposed scheme could increase the achievable rates of the
collided UEs under sparse mm-wave wireless channels. Platform: |
Size: 197632 |
Author:hadjidw |
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Description: IOS基站信号测试，包括信号、干扰、基站信息、小区信息等(IOS base station signal test, including signal, interference, base station information, cell information, etc.) Platform: |
Size: 1069056 |
Author:柳先生2018 |
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Description: Intelligent reflecting surface (IRS) is a promising
technology to enhance the coverage and performance of wireless
networks. We consider the application of IRS to non-orthogonal
multiple access (NOMA), where a base station transmits superposed signals to multiple users by the virtue of an IRS. The
performance of an IRS-assisted NOMA networks with imperfect
successive interference cancellation (ipSIC) and perfect successive
interference cancellation (pSIC) is investigated by invoking 1-
bit coding scheme. In particular, we derive new exact and
asymptotic expressions for both outage probability and ergodic
rate of the m-th user with ipSIC/pSIC. Based on analytical
results, the diversity order of the m-th user with pSIC is in
connection with the number of reflecting elements and channel
ordering. The high signal-to-noise radio (SNR) slope of ergodic
rate for the m-th user is obtained. The throughput and energy
efficiency of IRS-NOMA networks are discussed both in delaylimited and delay-tolerant transmission modes. Additionally, we
derive new exact expressions of outage probability and ergodic
rate for IRS-assisted orthogonal multiple access (IRS-OMA).
Numerical results are presented to substantiate our analyses and
demonstrate that: i) The outage behaviors of IRS-NOMA are
superior to that of IRS-OMA and relaying schemes; ii) The M-th
user has a larger ergodic rate than IRS-OMA and benchmarks.
However, the ergodic performance of the m-th user exceeds
relaying schemes in the low SNR regime; and iii) The IRS-assisted
NOMA networks have ability to achieve the enhanced energy
efficiency compared to conventional cooperative communications Platform: |
Size: 340469 |
Author:dipfr@yahoo.fr |
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Search - base station Interference