检索结果-内蒙古大学图书馆

Converse Bounds on modulation-estimation Performance for the Gaussian Multiple-Access Channel

IEEE TRANSACTIONS ON INFORMATION THEORY 2018年第2期64卷 1217-1230页

作者： Unsal, Ayse Knopp, Raymond Merhav, Neri Eurecom Commun Syst Dept F-06410 Biot France Technion Andrew & Erna Viterbi Fac Elect Engn IL-3200003 Haifa Israel

This paper focuses on the problem of separately modulating and jointly estimating two independent continuous-valued parameters sent over a Gaussian multiple-access channel (MAC) under the mean square error (MSE) criterion without bandwidth constraints. To this end, we first improve an existing lower bound on the MSE that is obtained using the parameter modulation-estimation techniques for the single-user additive white Gaussian noise (AWGN) channel. As for the main contribution of this paper, this improved modulation-estimation analysis is generalized to the model of the two-user Gaussian MAC. We present outer bounds to the achievable region in the plane of the MSE's of the two user parameters, which provides a trade-off between the MSE's, where we used zero-rate lower bounds on the error probability of Gaussian channels by Shannon and Polyanskiy et al. Numerical results showed that, the multi-user adaptation of the zero-rate lower bound by Polyanskiy et al. provides a tighter overall lower bound on the MSE pairs than the classical Shannon bound. In addition, we introduced upper bounds on the MSE exponents, namely, the exponential decay rates of these MSE's in the asymptotic regime of long blocks that could make use of any bound on the error exponent of a single-user AWGN channel. The obtained results are numerically evaluated for three different bounds on the reliability function of the Gaussian channel. It is shown that the adaptation of the reliability function by Ashikhmin et al. to the MAC provides a significantly tighter characterization than Shannon's sphere-packing bound and the divergence bound.

关键词： parameter modulation-estimation multiple-access channel error exponents MSE

来源：评论

学校读者我要写书评

暂无评论

Transmission of Sporadic Analog Samples Over Wireless Channels

引用

IEEE TRANSACTIONS ON COMMUNICATIONS 2016年第1期64卷 354-364页

作者： Unsal, Ayse Knopp, Raymond EURECOM Dept Mobile Commun F-06904 Sophia Antipolis France Univ Paderborn Dept Elect Engn & Informat Technol D-33098 Paderborn Germany

A low-latency, parameter modulation-estimation feedback protocol for wide-band channels is introduced for both pure line-of-sight and more general fading channels with several degrees of freedom. One round of the protocol consists of a data phase and a control phase and uses noncoherent detection. The asymptotic optimality in energy efficiency of the protocol is analyzed and an upper bound on the distortion level is derived for two rounds. The proposed scheme, as well as known one-way schemes, are compared with classical and very recent lower bounds. Both the lower bounds and performance evaluation of the feedback protocol are extended to a multichannel fading model. The improvement of the feedback protocol over one-shot transmission is shown to be very significant on both line-of-sight and fading channels.

关键词： Joint source-channel coding parameter modulation-estimation non-coherent detection distortion

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：