Description: MIMO-OFDM信道估计技术导论
详细描述了MIMO和SISO-OFDM中的信道估计技术-MIMO OFDM channel estimation techniques described in detail Introduction to MIMO and the SISO-OFDM channel estimation techniques Platform: |
Size: 454656 |
Author:张乃元 |
Hits:
Description: 国外的详细的OFDM设计过程文档，对学习OFDM非常有帮助，并且有仿真结果。-This report discusses the design and implementation of an OFDM modem for a simplex communication
between two PCs over a frequency selective channel. First a brief introduction is
provided by explaining the backrground and the specification of the project. Then the report
deals with the system model. Each block of the OFDM system is described (IFFT/FFT, cyclic
prefix, modulation/demodulation, channel estimation, bit loading). In the following section, the
system architecture is analysed. The transmission protocol, as well as the system parameters
are explained in details. Then, the DSP implementation is discussed. Finally, the results are
provided in the last chapter. Platform: |
Size: 1709056 |
Author: |
Hits:
Description: 设计了一个OFDM接收机，并采用1fI公司的TMS320C6416芯片进行实现。在假设理想
同步的前提下，该系统进行了FFT变化、使用了Ls(最小二乘法)进行信道估计，并且采用了
QPSK算法进行解调。最后将接收机输出数据与发端数据进行比较，在不同信噪比情况下计算其
误码率，得出了比较理想的结果。-An OFDM receiver is designed in山is paper and realized on the platform of the 1MS32OC6416 chip
of the TI company．Under the assumption of ideal synchronization．n叩transformation is realized in the system
wit}l LS method implemented in the channel estimation module and QPSK used in the demodulation module．
Finally，BER is calculated in different cases of SNR and the result is achieved as expected． Platform: |
Size: 243712 |
Author:王熹 |
Hits:
Description: 十篇关于OFDM的论文，其中两篇为学位论文，内容涉及OFDM习题信道估计的研究仿真，软硬件仿真，信道估计算法优化以及基于MATLAB的系统仿真分析~~ -10 papers on OFDM, in which two for the dissertation, which relates to OFDM channel estimation of exercise simulation, hardware and software simulation, optimization and channel estimation algorithm for systems based on MATLAB simulation ~ ~ Platform: |
Size: 5881856 |
Author:gongshulei |
Hits:
Description: — Performance comparison of multiuser OFDM-TDMA and
OFDMA systems by considering physical and link cross-layer behavior
is conducted in this work. We provide a new framework for performance
evaluation that centers on “ scheduling” with several different
subcarrier/bit allocation schemes. The performance metrics include: the
bit rate, the bit error rate (BER), packet throughput and delay. The
instantaneous channel conditions of users are assumed to be available
at the base station, which can be achieved by channel estimation at the
mobile terminal (MT), and then fed back to the base station through
a control channel. To perform the link layer comparison, we model the
Rayleigh fading channel with a nite-state Markov chain, and adopt the
M/G/1 queueing model as the analytical tool. Computer simulation is
performed to verify conducted analytical results-— Performance comparison of multiuser OFDM-TDMA and
OFDMA systems by considering physical and link cross-layer behavior
is conducted in this work. We provide a new framework for performance
evaluation that centers on “ scheduling” with several different
subcarrier/bit allocation schemes. The performance metrics include: the
bit rate, the bit error rate (BER), packet throughput and delay. The
instantaneous channel conditions of users are assumed to be available
at the base station, which can be achieved by channel estimation at the
mobile terminal (MT), and then fed back to the base station through
a control channel. To perform the link layer comparison, we model the
Rayleigh fading channel with a nite-state Markov chain, and adopt the
M/G/1 queueing model as the analytical tool. Computer simulation is
performed to verify conducted analytical results Platform: |
Size: 166912 |
Author:alaa |
Hits:
Description: carrier_count= 200
bits_per_symbol = 2
symbols_per_carrier = 50
loop=10
num=5
循环次数 10
子载波数 200
位数/ 符号 2
符号数/ 载波 50
训练符号数 5
循环前缀长度 T/4
调制方式 QAM
多径信道数 2（缺省）
信道最大时延 5 (单位数据符号)
仿真条件 收发之间严格同步
一个OFDM系统 在瑞利信道环境下 包括信道估计 比较适合初学者-carrier_count = 200 bits_per_symbol = 2 symbols_per_carrier = 50 loop = 10 num = 5 10 cycles 200 of the median number of subcarriers/symbol and the number of symbols of 2 /50 of the carrier the number of training symbol cyclic prefix length of 5 T/4 modulation QAM Number of multi-path channel 2 (default) 5 channel maximum delay (in the data symbol) strict synchronization between the simulation conditions receive an OFDM system in Rayleigh channel environment, including more suitable for channel estimation beginner Platform: |
Size: 2048 |
Author:Mir Ge |
Hits:
Description: 这是一本描述MIMO多输入多输出天线通信系统基础知识的书，包括MIMO发展现在现状，MIMO目前面临的问题，MIMO的信道模型，空时分组码，分层空时码，以及信道估计等。-This is a description of MIMO multiple-input multiple-output antenna communication system based on knowledge of books, including MIMO development is now status quo, MIMO current problems, MIMO channel model, STBC, BLAST, and channel estimation . Platform: |
Size: 7138304 |
Author:dreaman |
Hits:
Description: 文章介绍了OFDM 系统中插入导频的Ls信道估计与MMSE信道估计两种算法，通过试验
仿真说明了MMSE信道估计算法对系统性能的提升要优于Ls信道估计算法，但MMSE信道估计算法的
计算量大于LS信道估计算法。-This paper introduced the MMSE and LS of pilot based channel estimation in the OFDM system，the expert。一
ment shows that the MMSE channel estimation algorithm is superior to the LS channel estimation algorithm in improvement of
the system，but the MMSE algorithm has more complicated algorithm． Platform: |
Size: 186368 |
Author:张洋 |
Hits:
Description: Iterative receiver techniques, multiple-input – multiple-output (MIMO) processing, and
orthogonal frequency division multiplexing (OFDM) are amongst the key physical layer
technologies when aiming at higher spectral efficiency for a wireless communication system.
Special focus is put on iterative detection, decoding, and channel estimation for a MIMO-OFDM
system. After designing separately efficient algorithms for the detection, channel decoding, and
channel estimation, the objective is to optimize them to work together through optimizing the
activation schedules for soft-in soft-out (SfISfO) components. Platform: |
Size: 3104768 |
Author:ashish |
Hits:
Description: OFDM : Orthogonal Frequency Division Multiplexing (OFDM) is the fourth-generation mobile communication core technology. The article briefly introduces the basic principles of OFDM, focus on the ideal synchronous circumstances, Protection slot (counted ac cording) and different channel estimation method in Gaussian channel and multi-path Rayleigh fading channels of OFDM system performance Platform: |
Size: 1024 |
Author:kanniyappan/AIHT |
Hits:
Description: 关于ofdm导频和设计和信道估计的文献，希望对大家能有帮助。-And on the design and pilot ofdm channel estimation literature, in the hope that we can help. Platform: |
Size: 368640 |
Author:xushuo |
Hits:
Description: 基于期望最大化(EM)的最大后验信道估计算法(MAP)在高信噪比(SNR)下将很难获得较低的估计误差,并且,对于导频辅助的MIMO-OFDM系统,OFDM符号的数据传输效率随着发送天线的增加而明显下降.为改善这两种缺陷,引入一种等效的信号模型来改善高SNR下的估计性能 在相邻多个OFDM符号内使用相移正交导频序列和联合估计来提高系统的数据传输效率和估计性能 根据角域内信道间的独立性来减小噪声对估计的影响.通过仿真实验可知,所提算法具有更小的估计误差和更高的数据传输效率.-Maximum a posteriori(MAP) channel estimation algorithm usually uses expectation maximum(EM) algorithm to decrease the high computation.However,this kind of operation has a difficulty in obtaining ideal estimation performance at high signal to noise ratio(SNR) because of the convergent feature of EM algorithm.In addition,for pilot-based multiple-input multiple-output with orthogonal frequency division multiplexing(MIMO-OFDM) systems,data transmission efficiency of OFDM symbol will be reduced with the increas... Platform: |
Size: 134144 |
Author:王睿 |
Hits:
Description: 信道估计方面的参考，初学者会有很大帮助，基于OFDM系统，有最基本的算法仿真和对比-Channel estimation in terms of reference for beginners will be of great help to the OFDM-based systems, simulation and comparison of the basic algorithm Platform: |
Size: 2048 |
Author:赵宇 |
Hits:
Search - channel estimation in ofdm