Achievable Rates of MIMO Bidirectional Broadcast Channels With Self-Interference Aided Channel Estimation

Jian Zhao, Marc Kuhn, Armin Wittneben, Gerhard Bauch
2009 2009 IEEE Wireless Communications and Networking Conference  
In this paper, we consider the broadcast (BRC) phase of two-way decode-and-forward (DF) relaying systems. The channel in that phase is called the bidirectional broadcast channel. Its achievable rates are calculated when the self-interference aided channel estimation scheme is applied. We consider a blockfading channel model in the BRC phase and exploit the selfinterference that is inherent in two-way relaying techniques to get an initial estimate of the channel at the receiving terminals. This
more » ... ng terminals. This initial channel estimate is utilized to decode the data in the first several time slots of each coherence interval. Dataaided approaches are then employed to improve the channel estimates in the following time slots of each coherence interval. The spectral efficiency improvement for systems employing this self-interference aided channel estimation scheme is quantified by comparing its achievable rates to that of the traditional pilotaided channel estimation scheme. 978-1-4244-2948-6/09/$25.00 ©2009 IEEE This full text paper was peer reviewed at the direction of IEEE Communications Society subject matter experts for publication in the WCNC 2009 proceedings.
doi:10.1109/wcnc.2009.4917555 dblp:conf/wcnc/ZhaoKWB09 fatcat:bzcm2bofjne2rc6gu4i7hdafgi