Description: 讲解GSM频率划分及信道分配，GSM手机射频测试项目以及指标。-On the GSM frequency allocation and channel allocation, GSM mobile phone RF test items, and indicators. Platform: |
Size: 129024 |
Author:袁勇 |
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Description:
正交频分复用是一种多载波宽带数字调制技术。相比一般的数字通信系统，
它具有频带利用率高和抗多径干扰能力强等优点，因而适合于高速率的无线通信系统。-
OFDM Simulator
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MIMO OFDM Simulator:
OFDM.m: OFDM Simulator (outer function)
create_channel.m: Generates a Rayleigh fading frequency-selective channel, parametrized by the antenna configuration, the OFDM configuration, and the power-delay profile.
svd_decompose_channel.m: Since full channel knowledge is assumed, transmission is across parallel singular value modes. This function decomposes the channel into these modes.
BitLoad.m: Apply the bit-loading algorithm to achieve the desired bit and energy allocation for the current channel instance.
ComputeSNR.m: Given the subcarrier gains, this simple function generates the SNR values of each channel (each singular value on each tone is a separate channel).
chow_algo.m: Apply Chow s algorithm to generate a particular bit and energy allocation.
EnergyTableInit.m: Given the SNR values, form a table of energy increments for Platform: |
Size: 184320 |
Author:田静 |
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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: This is an algorithm for DynamicChannel Allocation in GSM frequency planning. The source code is being developed and will be uploaded soon. Platform: |
Size: 133120 |
Author:Jackson |
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Description: 动态信道分配的一种完全共享方案，所有用户和业务可以根据实际情况动态使用系统的时隙和频率资源-Dynamic channel allocation in a complete sharing scheme, all users and businesses can use the system according to the actual situation of dynamic time slot and frequency resources Platform: |
Size: 1024 |
Author:高婷 |
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Description: In this paper, proposeed a general methodology to study the performance of frequency allocation schemes in 3G LTE OFDMA systems.-In this paper, proposeed a general methodology to study the performance of frequency allocation schemes in 3G LTE OFDMA systems. Platform: |
Size: 326656 |
Author:HamidReza Mirsalari |
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Description: 频域不同导频密度的信道估计在被研究，并且在高低时延信道其信道估计被固定了导频分配时域。频域信道估计是基于插补，多项式的广义线性模型（或最小二乘法）和维纳滤波（或线性最小均方误差法）的方法。时域的信道估计是用线性插补完成的。我们通过测量在基于克拉克散射模型的瑞利衰落信道上并带有QPSK调制的粗误码率，已经比较了所有这些方案的结果。-Different pilot density in frequency domain channel estimate to research, and its high and low delay channel estimation channel was fixed allocation of time-domain pilot. Frequency domain channel estimation is based on interpolation, polynomial generalized linear model (or least squares) and the Wiener filter (or linear minimum mean square error method) method. Time domain channel estimation is done using linear interpolation. We are by measuring the scattering model based on Clark and Rayleigh fading channels with QPSK modulation bit error rate of crude, has compared the results of all these programs. Platform: |
Size: 2505728 |
Author:雨儿 |
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Description: 中华人民共和国无线电频率划分规定
Radio frequency allocation requirements of the PRC-Radio frequency allocation requirements of the PRC Platform: |
Size: 768000 |
Author:臧士华 |
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Description: 中国无线电频率分配表：频段划分及主要用途，业余无线电通信频率使用划分表等-China Radio Frequency Allocation Table: band division and the main uses of amateur radio frequency table, etc.
Platform: |
Size: 73728 |
Author:liyq |
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Description: 基于OFDMA系统的多用户资源分配算法，论文配备MATLAB代码，入门的好教材。-— Orthogonal Frequency Division Multiple Access (OFDMA) basestations allow multiple users to transmit simultaneously on different subcarriers during the same symbol period. This paper considers basestation allocation of subcarriers and power to each user to maximize the sum of user data rates, subject to constraints on total power, bit error rate, and proportionality
among user data rates. Previous allocation methods have been iterative nonlinear methods suitable for ofine optimization. In the special high subchannel SNR case, an iterative root-nding method has linear-time complexity in the number of users and
N logN complexity in the number of subchannels. We propose
a non-iterative method that is made possible by our relaxation
of strict user rate proportionality constraints. Compared to the
root-nding method, the proposed method waives the restriction
of high subchannel SNR, has signicantly lower complexity, and
in simulation, yields higher user data rates. Platform: |
Size: 160768 |
Author:王刚名 |
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Description: Our team has developed a Matlab simulation for OFDMA networks. We propose a dynamic FFR mechanism that selects the optimal frequency allocation and inner cell radius based on the cell total throughput and a custom metric which is called user satisfaction (US). In detail, the mechanism divides the cell into two regions (inner and outer). For each potential frequency allocation (FA), the mechanism calculates the per-user throughput, the cell total throughput and US. This procedure is repeated for successive inner cell radius. Afterwards, the mechanism selects the optimal FFR scheme that maximizes the cell total throughput and US. Platform: |
Size: 4096 |
Author:akbar |
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Description: Dynamic Frequency Allocation Scheme of Mobile Networks using Priority Assignment Technique
:Cognitive Radio + Platform: |
Size: 760832 |
Author:Suman |
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Description: 电子园Cepark-CM3开发板，端口在高频配置下的测试代码例程-Electronic Park Cepark-CM3 development board, port testing code in high frequency allocation routine
Platform: |
Size: 1008640 |
Author:张光华 |
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