Coexisting linear and widely linear transceivers in the MIMO interference
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Cita com:
hdl:2117/85426
Tipus de documentArticle
Data publicació2016-01
Condicions d'accésAccés obert
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Abstract
Recent results have shown the benefits of widely
linear precoding (WLP) in the MIMO interference channel
(MIMO IC) assuming that all transmitters can follow the same
strategy. Motivated by a transitional scenario where legacy linear
transmitters coexist with widely linear ones, this work investigates
the general K-user MIMO IC in a heterogeneous (linear and
widely linear) transmitter deployment. In particular, we address
the maximization of the weighted sum-rate (WSR) for (widely)
linear transmit filters design through the use of the complexvalued
formulation. Since the maximum WSR problem is nonconvex,
and thus difficult to be solved, we formulate an equivalent
minimum weighted mean square error problem that allows
deriving closed-form expressions for (widely) linear transceivers.
Then an iterative procedure is proposed, which is proven to reach
a stationary point of the maximum WSR problem. Simulations
show that the proposed procedure allows increasing the sumrate
as compared to coordinated linear transceiver schemes. The
gains are larger and significant in two different non-exclusive
conditions: as the interference level increases or when the number
of antennas is low.
Descripció
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CitacióLagen, S., Agustin, A., Vidal, J. Coexisting linear and widely linear transceivers in the MIMO interference. "IEEE transactions on signal processing", Gener 2016, vol. 64, núm. 3, p. 652-665.
ISSN1053-587X
Versió de l'editorhttp://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=7296681
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WLP_final.pdf | Articulo principal | 878,8Kb | Visualitza/Obre |