CIF: Small: Network Beamforming: A Distributed Source Coding Perspective

无线网络通过其便携性、移动性和可访问性的承诺，极大地影响了我们的生活。频谱是无线网络中最有价值的资源。随着无线网络中用户数量的增加，不同的用户会竞争相同部分的可用频谱。这种竞争的结果可能是服务质量较低、部分用户减少、价格更高等。解决其中一些挑战的一个有希望的想法是让用户在相互竞争的同时进行合作。研究这样的多用户协作通信系统是本方案的主要目标。协作通信的大部分重点都放在提高单用户(点对点)通信的性能上。单用户设置的洞察力不足以应对多用户通信网络的挑战。当将模式从单用户转换为多用户时，自然会出现以下问题：在受到干扰的多用户网络环境中，合作有什么好处？如何实现这些好处？我们首先定义了新的性能指标，称为广义分集顺序。然后，我们研究了上述问题的不同方面，包括在不同的多用户协作通信网络场景下的最大可能分集阶数。我们还建议设计实现这些最大分集阶数的实用系统。

Wireless networks have influenced our life tremendously through the promise of portability, mobility, and accessibility. Spectrum is the most valuable resource in a wireless network. As the number of users in a wireless network is increased, different users compete for the same portion of the available spectrum. The result of such a competition may be a lower quality of service, dropping of some users, higher prices and so on. One promising idea to resolve some of these challenges is to let the users cooperate in addition to compete with each other. The study of such a multi-user cooperative communications system is the main goal of this proposal. Most of the emphasis in cooperative communications has been on improving the performance of a single-user (point-to-point) communication. The insights from the single-user setting are not sufficient to address the challenges of multi-user communication networks. When shifting the paradigm from single-user to multi-user, the natural question that arises is the following - what are the benefits of cooperation in a multi-user network setting suffering from interference and how to achieve them? We start by defining new performance measures called generalized diversity orders. Then, we study different aspects of the above question including the maximum possible diversity orders in different multi-user cooperative communications network scenarios. We also propose to design practical systems that achieve these maximum diversity orders.