Multiple Access Channels With States Causally Known at Transmitters
Multiple Access Channels With States Causally Known at Transmitters
复制标题
发射机状态已知的多接入信道
DOI：
10.1109/tit.2012.2229459
复制
发表时间：
2010
影响因子：
2.5
通讯作者：
A. Yener
中科院分区：
文献类型：
--
作者：
Min Li;O. Simeone;A. Yener
Lapidoth和Steinberg最近证明了严格因果状态信息在多址接入信道（MAC）中是有益的。具体来说，它被证明是一个独立的状态，每个严格因果关系的一个编码器，可以通过让编码器发送压缩过去的状态信息的解码器的两个用户的MAC的容量区域被扩大。在这项研究中，所述策略的概括提出，从而编码器压缩过去发送的码字沿着与过去的状态序列。该方案采用长消息编码，压缩过去的状态序列和码字没有binning，并在所有传输块的联合解码的组合。Lapidoth和Steinberg最近提出的策略严格改进了原来的策略。容量结果，然后推导出一类信道，包括两个用户的模加性状态依赖MAC。此外，所提出的计划扩展到状态相关的MAC与任意数量的用户。最后，输出反馈的介绍和一个例子来说明之间的相互作用的反馈和严格因果状态信息的可用性在扩大容量区域。
It has been recently shown by Lapidoth and Steinberg that strictly causal state information can be beneficial in multiple access channels (MACs). Specifically, it was proved that the capacity region of a two-user MAC with independent states, each known strictly causally to one encoder, can be enlarged by letting the encoders send compressed past state information to the decoder. In this study, a generalization of the said strategy is proposed whereby the encoders compress also the past transmitted codewords along with the past state sequences. The proposed scheme uses a combination of long-message encoding, compression of the past state sequences and codewords without binning, and joint decoding over all transmission blocks. The proposed strategy has been recently shown by Lapidoth and Steinberg to strictly improve upon the original one. Capacity results are then derived for a class of channels that include two-user modulo-additive state-dependent MACs. Moreover, the proposed scheme is extended to state-dependent MACs with an arbitrary number of users. Finally, output feedback is introduced and an example is provided to illustrate the interplay between feedback and availability of strictly causal state information in enlarging the capacity region.