## Tunable channel decomposition for MIMO communications using channel state information (2006)

Venue: | IEEE Transactions on Signal Processing |

Citations: | 7 - 0 self |

### BibTeX

@TECHREPORT{Jiang06tunablechannel,

author = {Yi Jiang and William W. Hager and Jian Li},

title = {Tunable channel decomposition for MIMO communications using channel state information},

institution = {IEEE Transactions on Signal Processing},

year = {2006}

}

### OpenURL

### Abstract

Abstract—We consider jointly designing transceivers for multiple-input multiple-output (MIMO) communications. Assuming the availability of the channel state information (CSI) at the transmitter (CSIT) and receiver (CSIR), we propose a scheme that can decompose a MIMO channel, in a capacity lossless manner, into multiple subchannels with prescribed capacities, or equivalently, signal-to-interference-and-noise ratios (SINRs). We refer to this scheme as the tunable channel decomposition (TCD), which is based on the recently developed generalized triangular decomposition (GTD) algorithm and the closed-form representation of minimum mean-squared-error VBLAST (MMSE-VBLAST) equalizer. The TCD scheme is particularly relevant to the applications where independent data streams with different qualities-of-service (QoS) share the same MIMO channel. The TCD scheme has two implementation forms. One is the combination of a linear precoder and a minimum mean-squared-error VBLAST (MMSE-VBLAST) equalizer, which is referred to as TCD-VBLAST, and the other includes a dirty paper (DP) precoder and a linear equalizer followed by a DP decoder, which we refer to as TCD-DP. We also include the optimal code-division multiple-access (CDMA) sequence design as a special case in the framework of MIMO transceiver designs. Hence, our scheme can be directly applied to optimal CDMA sequence design, both in the uplink and downlink scenarios. Index Terms—Channel capacity, channel decomposition, dirty paper (DP) precoding, generalized triangular decomposition, joint transceiver design, multiple-input multiple-output (MIMO), optimal CDMA sequences, quality-of-service, VBLAST. I.

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Citation Context ... of the flops number. B. TCD-DP As a dual form of TCD-VBLAST, the TCD scheme can be implemented by using a DP precoder, which we refer to as TCD-DP. We exploit the uplink–downlink duality revealed in =-=[22]-=- to obtain TCD-DP. The derivations of TCD-DP is almost the same as those of UCD-DP in [5]. The only difference is that the (54) in [5] is replaced by (recall that here) . . . .. . .. . . . . . (28) Ju... |

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Citation Context ...composition approach, namely the tunable channel decomposition (TCD) scheme, which is the main focus of this paper. Using the recently developed generalized triangular decomposition (GTD) of matrices =-=[10]-=-, we propose the TCD scheme to decompose a MIMO channel into multiple subchannels with prescribed capacities, or equivalently, signal-to-interference-andnoise ratios (SINRs). The TCD scheme has two ma... |

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Citation Context ...gorithm. The UCD scheme is an optimal solution among all the existing schemes that aim at improving the communication quality subject to the power constraints. A similar work is recently presented in =-=[9]-=-. In this paper, we tackle a new aspect of the MIMO transceiver design problem. We regard the MIMO transceiver design as a way of decomposing a MIMO channel into multiple subchannels with flexibility.... |

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Citation Context ...http://ieeexplore. ieee.org. Digital Object Identifier 10.1109/TSP.2006.880233 1053-587X/$20.00 © 2006 IEEE design utilizing both CSIT and channel state information at receiver (CSIR) (see, e.g., [1]–=-=[8]-=- and the references therein). The goal of the joint transceiver design is to improve the MIMO system performance, including the channel throughput and biterror-rate (BER) performance, through optimizi... |

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