Successive zero-forcing DPC with per-antenna power constraint: Optimal and suboptimal designs
2012 (English)In: Communications (ICC), 2012 IEEE International Conference on, IEEE , 2012, 3746-3751 p.Conference paper (Refereed)
This paper considers the precoder designs for successive zero-forcing dirty paper coding (SZF-DPC), a suboptimal transmission technique for MIMO broadcast channels (MIMO BCs). Existing precoder designs for SZF-DPC often consider a sum power constraint. In this paper, we address the precoder design for SZF-DPC with per-antenna power constraints (PAPCs), which has not been well studied. First, we formulate the precoder design as a rank-constrained optimization problem, which is generally difficult to handle. To solve this problem, we follow a relaxation approach, and prove that the optimal solution of the relaxed problem is also optimal for the original problem. Considering the relaxed problem, we propose a numerically efficient algorithm to find the optimal solution, which exhibits a fast convergence rate. Suboptimal precoder designs, with lower computational complexity, are also presented, and compared with the optimal ones in terms of achievable sum rate and computational complexity.
Place, publisher, year, edition, pages
IEEE , 2012. 3746-3751 p.
, IEEE International Conference on Communications, ISSN 1550-3607
IdentifiersURN: urn:nbn:se:kth:diva-107460DOI: 10.1109/ICC.2012.6364222ScopusID: 2-s2.0-84872001712ISBN: 978-145772052-9OAI: oai:DiVA.org:kth-107460DiVA: diva2:575977
2012 IEEE International Conference on Communications, ICC 2012; Ottawa, ON; 10 June 2012 through 15 June 2012
FunderICT - The Next Generation
QC 201301182012-12-112012-12-112016-04-22Bibliographically approved