作者
Tiangao Gou, Syed A Jafar, Chenwei Wang
发表日期
2011/6
期刊
Information Theory, IEEE Transactions on
卷号
57
期号
6
页码范围
3286-3308
出版商
IEEE
简介
We explore the degrees of freedom (DoF) of three classes of finite state compound wireless networks in this paper. First, we study the multiple-input single-output (MISO) finite state compound broadcast channel (BC) with arbitrary number of users and antennas at the transmitter. In prior work, Weingarten have found inner and outer bounds on the DoF with 2 users. The bounds have a different character. While the inner bound collapses to unity as the number of states increases, the outer bound does not diminish with the increasing number of states beyond a threshold value. It has been conjectured that the outer bound is loose and the inner bound represents the actual DoF. In the complex setting (all signals, noise, and channel coefficients are complex variables), we solve a few cases to find that the outer bound—and not the inner bound—of Weingarten is tight. For the real setting (all signals, noise, and channel coefficients …
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