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• W2100345042 startingPage "1334" @default.
• W2100345042 abstract "This paper considers MIMO transceivers with linear precoders and decision feedback equalizers (DFEs), with bit allocation at the transmitter. Zero-forcing (ZF) is assumed. Considered first is the minimization of transmitted power, for a given total bit rate and a specified set of error probabilities for the symbol streams. The precoder and DFE matrices are optimized jointly with bit allocation. It is shown that the generalized triangular decomposition (GTD) introduced by Jiang, Li, and Hager offers an optimal family of solutions. The optimal linear transceiver (which has a linear equalizer rather than a DFE) with optimal bit allocation is a member of this family. This shows formally that, under optimal bit allocation, linear and DFE transceivers achieve the same minimum power. The DFE transceiver using the geometric mean decomposition (GMD) is another member of this optimal family, and is such that optimal bit allocation yields identical bits for all symbol streams-no bit allocation is necessary-when the specified error probabilities are identical for all streams. The QR-based system used in VBLAST is yet another member of the optimal family and is particularly well-suited when limited feedback is allowed from receiver to transmitter. Two other optimization problems are then considered: (a) minimization of power for specified set of bit rates and error probabilities (the QoS problem), and (b) maximization of bit rate for fixed set of error probabilities and power. It is shown in both cases that the GTD yields an optimal family of solutions." @default.
• W2100345042 created "2016-06-24" @default.
• W2100345042 creator A5049466863 @default.
• W2100345042 creator A5049958491 @default.
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• W2100345042 date "2010-03-01" @default.
• W2100345042 modified "2023-09-26" @default.
• W2100345042 title "MIMO Transceivers With Decision Feedback and Bit Loading: Theory and Optimization" @default.
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• W2100345042 doi "https://doi.org/10.1109/tsp.2009.2033311" @default.
• W2100345042 hasPublicationYear "2010" @default.
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