Impact of Interference in Coexisting Wireless Networks with Applications to Arbitrarily Varying Bidirectional Broadcast Channels

Entropy

Rafael F. Wyrembelski¹ 

关键词: unknown interference;    arbitrarily varying channel;    bidirectional relaying;    bidirectional broadcast channel;    input and state constraints;    capacity region;    coexisting networks;   

DOI  :  10.3390/e14081357

来源: mdpi

【 摘 要 】

The paradigm shift from an exclusive allocation of frequency bands, one for each system, to a shared use of frequencies comes along with the need of new concepts since interference will be an ubiquitous phenomenon. In this paper, we use the concept of arbitrarily varying channels to model the impact of unknown interference caused by coexisting wireless systems which operate on the same frequencies. Within this framework, capacity can be zero if pre-specified encoders and decoders are used. This necessitates the use of more sophisticated coordination schemes where the choice of encoders and decoders is additionally coordinated based on common randomness. As an application we study the arbitrarily varying bidirectional broadcast channel and derive the capacity regions for different coordination strategies. This problem is motivated by decode-and-forward bidirectional or two-way relaying, where a relay establishes a bidirectional communication between two other nodes while sharing the resources with other coexisting wireless networks.

【 授权许可】

CC BY   
© 2012 by the authors; licensee MDPI, Basel, Switzerland.