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Title:
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Transceiver design framework for multiuser MIMO-OFDM broadcast systems with channel gram matrix feedback
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Author:
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Sacristán Murga, Daniel; Payaró Llisterri, Miquel; Pascual Iserte, Antonio
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Teoria del Senyal i Comunicacions; Universitat Politècnica de Catalunya. A&MP - Grup de Processament d'Arrays i Sistemes Multicanal |
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Abstract:
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This work considers a multiple-input multipleoutput
(MIMO) orthogonal frequency division multiplexing
based multiuser broadcast system with precoding at the transmitter
and feedback of channel state information. A general
framework is presented for the transceiver design, and also for
the design of the feedback link based on the quantization of the
users’ MIMO channel Gram matrices. The proposed design of
the feedback link exploits the correlation of the channel response
in the frequency domain due to the finite length of the channel
time impulse responses to outperform other schemes based on
feedback of the per carrier frequency responses. The transceiver
design framework is based on a unitary linear transformation
applied at the receivers which allows the computation of equivalent
triangular channel response matrices at the transmitter.
An analytic study of the error propagation due to the channel
quantization in the feedback link and the computation of the
equivalent triangular channel matrices is also performed. Based
on the previous concepts, all the usual transceiver design criteria
can be applied within this framework, and the particular case
of a space-frequency precoder for robust mean square error
minimization is derived as an example. Finally, the benefits
of the proposed strategy are evaluated by means of numerical
simulations and compared to other existing techniques. |
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Abstract:
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Peer Reviewed |
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Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria de la telecomunicació
-MIMO systems
-Orthogonal frequency division multiplexing
-MIMO systems
-OFDM
-Broadcast channel
-Feedback communication
-Matrix decomposition
-Minimum mean square error
-Multiuser communications
-Robust designs
-Sistemes MIMO
-Multiplexatge per divisió de freqüència |
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Rights:
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Document type:
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Article - Published version
Article |
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