查看完整版本: 一篇非常好的国外博士论文

一篇非常好的国外博士论文

作迭代信道估计和检测方面非常好的一篇论文，希望对大家有帮助！

【资料成文时间】： 2005.12
【语言】：英文
【页数】： 118
【何人（公司）所著】： Jie Gao，A THESIS submitted to Oregon State University
【文件格式】： rar
【文件原名】： Channel Estimation and Data Detection for Mobile MIMO OFDM Systems
【摘要或目录】：
    Designing spectral e±cient, high-speed wireless links that o®er high quality-
of-service and range capability has been a critical research and engineering chal-
lenge. In this thesis, we mainly address the complexity and performance issues of
channel estimation and data detection in multiple-input multiple-output (MIMO)
orthogonal frequency division multiplexing (OFDM) systems over time-varying
channels.
We derive the probability density function (pdf) expressions of the condi-
tion number (i.e., the maximum-to-minimum-singular-value ratio, MMSVR) of the
channel state information matrix of MIMO OFDM systems. It is shown that this
ratio is directly related to the noise enhancement in open-loop systems and provides
a signi¯cant insight on the system capacity.
A decision-directed (DD) maximum a posteriori probability (MAP) channel
estimation scheme of MIMO systems is derived. Error performance of a zero-
forcing receiver with the DD MAP and perfect channel estimates is provided and
compared. This scheme has a low complexity and can be applied to time-varying
Rayleigh fading channels with an arbitrary spaced-time correlation function.
We propose an iterative channel estimation and data detection scheme for
MIMO OFDM systems in the presence of inter-carrier-interference (ICI) due to
the nature of time-varying channels. An ICI-based minimum-mean-square error
(MMSE) detection scheme is derived. An expectation-maximization (EM) based
least square (LS) channel estimator is proposed to minimize the mean-square error
(MSE) of the channel estimates and to reduce the complexity of the implementation.
With the estimate of the channel and initially detected symbols, ICI is estimated
and removed from the received signal. Thus more accurate estimation of the channel
and data detection can be obtained in the next iteration.
An EM-based MAP channel estimator is derived by exploiting the fre-
quency/time correlation of the pilot and data sub-carriers. Performance comparison
is made between the proposed schemes and the ideal case { time-invariant channels
and perfect channel estimation. We optimize the data transmission by exploit-
ing the long term correlation characteristics. The transmitted data is successively
detected without an error °oor in spatially correlated channels.
The algorithms proposed in this thesis allow low-complexity implementation
of channel estimation and data detection for MIMO OFDM systems over time-
varying fading channels, while providing good error performance.

楼主：能不能把文章的目录列出来？

都不能查看,群啊 .

为什么总是不能下载？

[quote]原帖由 [i]arhat[/i] 于 2007-12-11 18:04 发表 [url=http://bbs.cnttr.cn/redirect.php?goto=findpost&pid=627979&ptid=126526][img]http://bbs.cnttr.cn/images/common/back.gif[/img][/url]
为什么总是不能下载？ [/quote]

需要是VIP用户才能下载吧，建议楼主修改标题，便于别人搜索。不过我觉得这样的论文网上似乎也能搜索到，放到这个区域不是很合适吧。