Optimally non-regenerative relaying for general dual-hop correlated MIMO channels

Nguyen, Anh V.; Tran, Nghi H.; Phuong, Nguyen Huu; Khoa, Đặng Lê

doi:10.1109/nics.2015.7302211

Cited by 1 publication

(13 citation statements)

References 19 publications

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“…5. The proposed joint precoding schemes in this paper provide higher capacity than the existing schemes in [4] and [28,29,31] by numerical simulations.…”

Section: Introductionmentioning

confidence: 95%

“…Instead of colored noise, the relay precoder that maximizes the average capacity of a two-hop relay system where the destination lies close to some interferers was designed based on covariance information of the interferers-destination channels and the relay-destination channel in [26]. The papers [28][29][30][31] considered general MIMO relay systems having spatially correlated channels, colored noises, and mutually correlated source signals. Note that mutually correlated source signals arise from encoding operations on the bit stream including channel coding, modulation, and space-time coding at a transmitter [7,32].…”

Section: Introductionmentioning

confidence: 99%

“…Note that mutually correlated source signals arise from encoding operations on the bit stream including channel coding, modulation, and space-time coding at a transmitter [7,32]. In [28,29], the optimal structure of relay precoder that maximizes the MI of the generally correlated two-hop MIMO relay systems was obtained by using full CSI of two links and covariance matrices of the correlated source signals and the colored noises known at the relay. The papers [30,31] devoted for the case of the generally correlated multi-hop MIMO relay systems.…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we investigate generally correlated twohop MIMO relay systems with mutually correlated source symbols, spatially correlated channels and colored noises. For the system capacity maximization, we propose joint designs of source and relay precoders in two cases of the full CSIT (like [28][29][30][31]) and the partial CSIT. The partial CSIT denotes full CSI of the source-relay link and covariance information of the relay-destination link and the source signal and noise covariance matrices known to the transmitters.…”

Section: Introductionmentioning

confidence: 99%

“…1. This paper extends the relay precoding with the full CSIT in [28,29] to the joint source and relay precoding with the full and partial CSIT. 2.…”

Section: Introductionmentioning

confidence: 99%

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Joint source and relay precoding for generally correlated MIMO with full and partial CSIT

Nguyen

Tran

Phuong

2017

J Wireless Com Network

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In this paper, we jointly design linear source and relay precoders for two-hop MIMO relaying. The involved channels encounter spatially correlated fading, the source data symbols are mutually correlated, and the noises are colored not only at the destination but also at the relay. Two different scenarios of channel state information (CSI) are assumed to be available at the transmitters: full CSI of both hops (the full CSIT) and full CSI of the source-relay hop only plus the covariance information of the relay-destination hop (the partial CSIT). First, with the full CSIT, we derive optimal precoders by maximizing the instantaneous mutual information (MI). Secondly, with the partial CSIT knowledge we derive suboptimal precoders by maximizing the average MI. For both the CSIT cases, we propose an iterative algorithm to perform power allocation iteratively and alternatively between the source antennas and the relay antennas. Its simplified version in which the power allocation is performed separately between the source antennas and the relay antennas is also developed. Simulation results show that our proposed precoding schemes with the full CSIT provide significantly higher capacity than the existing schemes. Besides, the proposed schemes with the partial CSIT also perform well especially when the channels are spatially correlated at the transmit sides and at medium-to-high signal-to-noise ratios (SNRs), while they require much lower computational complexity and less feedback overhead.

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“…5. The proposed joint precoding schemes in this paper provide higher capacity than the existing schemes in [4] and [28,29,31] by numerical simulations.…”

Section: Introductionmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

“…1. This paper extends the relay precoding with the full CSIT in [28,29] to the joint source and relay precoding with the full and partial CSIT. 2.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations