Outage Constrained Robust Beamforming for Multicast Multibeam Satellite Systems with a Phase Error

Yan, Yan; An, Kang; Zhang, Bangning; Li, Shengnan

doi:10.1109/taes.2020.2970795

Cited by 6 publications

(3 citation statements)

References 14 publications

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“…(1) "ZF": the nonrobust zero-forcing (ZF) BLP (2) "CIPM": the nonrobust CI constrained power minimization SLP [6] (3) "LDI": the large deviation inequality (LDI)-aided robust BLP method [10] (4) "OCRBP": the outage constrained robust BLP method based on S-procedure [11] (5) "OSCI-SR-CIPM": the proposed outdated CSI-based SR-CIPM SLP P 6 (6) "C-RSLP1": the RSLP method P 7 for comparison (7) "C-RSLP2": the RSLP method P 8 for comparison Te average transmit power is defned as follows:…”

Section: Resultsmentioning

confidence: 99%

“…Tus, the amplitude of outdated CSI is approximately equal to that of real CSI. However, due to tropospheric fading, φ k varies when the feedback of CSI is outdated [8][9][10][11]. As a result, the large RTT-based CSI error is mainly a phase error.…”

Section: System Model and Problem Formulationmentioning

confidence: 99%

“…Hence, only outdated CSI can be obtained, where the CSI error is usually modelled as a random phase error [8,9]. To reduce transmit power with only outdated CSI, robust BLP was studied for unicast [10] and multicast [11]. Besides, the CSI phase error model was also used to design a robust BLP matrix for an integrated satellite-terrestrial system [12] and over line-of-sight channels in a mobile communication system [13].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

A Robust Symbol-Level Precoding Method for Multibeam Satellite Systems

Wang,

Zhou

2023

International Journal of Antennas and Propagation

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Compared to interference mitigating precoding, interference exploiting symbol-level precoding (SLP) requires less transmit power to guarantee the quality of service in a multibeam satellite system. However, due to the large roundtrip time (RTT), it is impractical to obtain real-time channel state information on the satellite side. The random channel state information (CSI) phase error of outdated CSI could cause serious performance deterioration of SLP. To compensate the CSI phase error, we propose an outdated CSI-based robust SLP (RSLP) method, which optimizes the transmit power under outage probability constraints. The central limit theorem (CLT) and second-order Taylor expansion are used to relax the outage probability constraints into convex ones. In addition, because only outdated CSI-based robust block-level precoding exists, we present two comparative RSLP methods accordingly. Without violating outrage probability constraints, the proposed RSLP method requires much lower transmit power than comparative RSLP and existing robust block-level precoding methods. The complexity of the proposed RSLP method is also lower than that of two comparative RSLP methods.

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Section: Resultsmentioning

confidence: 99%