Precoder Feedback Schemes for Robust Interference Alignment With Bounded CSI Uncertainty

Garg, Navneet; Jagannatham, Aditya K.; Sharma, Govind; Ratnarajah, Tharmalingam

doi:10.1109/tsipn.2020.2995964

Cited by 16 publications

(33 citation statements)

References 56 publications

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“…

represents the linear decoding and precoding matrices. The goal of designing the

precoder and decoder is to find a null space spanned by the columns of a decoder matrix in order to align the interfering signals [ 11 , 35 , 36 , 37 ].…”

Section: Methodsmentioning

confidence: 99%

Interference Cancellation Based Spectrum Sharing for Massive MIMO Communication Systems

Miantezila

Guo

Zhang

et al. 2021

Sensors

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Cellular network operators are predicting an increase in space of more than 200 percent to carry the move and tremendous increase of total users in data traffic. The growing of investments in infrastructure such as a large number of small cells, particularly the technologies such as LTE-Advanced and 6G Technology, can assist in mitigating this challenge moderately. In this paper, we suggest a projection study in spectrum sharing of radar multi-input and multi-output, and mobile LTE multi-input multi-output communication systems near m base stations (BS). The radar multi-input multi-output and mobile LTE communication systems split different interference channels. The new approach based on radar projection signal detection has been proposed for free interference disturbance channel with radar multi-input multi-output and mobile LTE multi-input multi-output by using a new proposed interference cancellation algorithm. We chose the channel of interference with the best free channel, and the detected signal of radar was projected to null space. The goal is to remove all interferences from the radar multi-input multi-output and to cancel any disturbance sources from a chosen mobile Communication Base Station. The experimental results showed that the new approach performs very well and can optimize Spectrum Access.

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“…

represents the linear decoding and precoding matrices. The goal of designing the

precoder and decoder is to find a null space spanned by the columns of a decoder matrix in order to align the interfering signals [ 11 , 35 , 36 , 37 ].…”

Section: Methodsmentioning

confidence: 99%

Interference Cancellation Based Spectrum Sharing for Massive MIMO Communication Systems

Miantezila

Guo

Zhang

et al. 2021

Sensors

View full text Add to dashboard Cite

show abstract

“…More specifically, [41] and [42] have shown that a proper system is feasible when either M or N is divisible by d, or the system is symmetric, i.e., M = N . Further, [45] presents a uniqueness condition and ensures the IA-feasibility and the global maximum sum rate (or minimum MSE). Thus, we utilize the condition M + N − (K + 2)d ≥ 0 along with the IA algorithm from [45] to get the IA-solution.…”

Section: A Information Decodingmentioning

confidence: 99%

“…Further, [45] presents a uniqueness condition and ensures the IA-feasibility and the global maximum sum rate (or minimum MSE). Thus, we utilize the condition M + N − (K + 2)d ≥ 0 along with the IA algorithm from [45] to get the IA-solution.…”

Section: A Information Decodingmentioning

confidence: 99%

“…As compared to (4 × 4, 2) 3 system, the saturation in sum rates starts at higher SNR for (5 × 5, 2) 3 system, since more spatial dimensions are available in (5 × 5, 2) 3 to grant diversity gains. For limited feedback with 8 quantization bits per precoder, similar rate losses can be seen due to saturation, because to keep the rate loss constant number of bits need to be scaled proportional to SNR [45].…”

Section: Sum Rate and Harvested Energy Versus Snrsmentioning

confidence: 99%

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Improved Rate-Energy Trade-Off for SWIPT Using Chordal Distance Decomposition in Interference Alignment Networks

Garg

Rudraksh

Sharma

et al. 2022

IEEE Trans. on Green Commun. Netw.

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This paper investigates the simultaneous wireless information and power transfer (SWIPT) precoding scheme for K-user multiple-input-multiple-output (MIMO) interference channels (IC). In IC, interference alignment (IA) schemes provide optimal precoders to achieve full degrees-of-freedom (DoF) gain. To study a trade-off between harvested energy and sum rate, the transceiver design problem is suboptimally formulated in literature via convex relaxations, which is still computationally intensive, especially for battery limited nodes running on harvested energy. In this paper, we propose a systematic method using chordal distance (CD) decomposition to obtain the balanced precoding, which achieves the improved trade-off. Analysis shows that given the nonnegative value of CD, the achieved harvested energy for the proposed precoder is higher than that for perfect IA precoder. Moreover, energy constraints can be achieved, while maintaining a constant rate loss without losing DoFs via tuning the CD value and splitting factor. Simulation results verify the analysis and add that the IA schemes based on max-SINR or mean-squared error are better suited for SWIPT maximization than subspace or leakage minimization methods.

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“…Regarding interference management, interference alignment (IA) has been a popular method for a decade [38]. In the typical IA for MIMO interference channels (ICs), precoders for two interfering transmitters are designed to align the interfering signals at the receiver subspace, and the receiver can use a decoder (a linear combiner) to null the aligned interference [39], [40]. The following works uses IA in the SWIPT-relay system to mitigate the interference.…”

Section: Introductionmentioning

confidence: 99%

Rate-Energy Balanced Precoding Design for SWIPT based Two-Way Relay Systems

Garg¹,

Zhang²,

Ratnarajah³

2021

Preprint

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Simultaneous wireless information and power transfer (SWIPT) technique is a popular strategy to convey both information and RF energy for harvesting at receivers. In this regard, we consider a relay employing SWIPT strategy, where splitting the received signal leads to a rate-energy trade-off. In literature, the works on transceiver design have been studied using computationally intensive and suboptimal convex relaxation based schemes. In this paper, we study the balanced precoder design using chordal distance (CD) decomposition to provide a better rate-energy trade-off, which incurs much lower complexity and flexible to dynamic energy requirements. It is analyzed that given a non-negative value of CD, the achieved harvested energy for the proposed balanced precoder is higher than that for the perfect interference alignment (IA) precoder, while verifying the analyzed loss in sum rates. Simulation results verify the analysis and add that the IA schemes based on mean-squared error are better suited for the SWIPT maximization than the subspace alignment-based methods.

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Precoder Feedback Schemes for Robust Interference Alignment With Bounded CSI Uncertainty

Cited by 16 publications

References 56 publications

Interference Cancellation Based Spectrum Sharing for Massive MIMO Communication Systems

Interference Cancellation Based Spectrum Sharing for Massive MIMO Communication Systems

Improved Rate-Energy Trade-Off for SWIPT Using Chordal Distance Decomposition in Interference Alignment Networks

Rate-Energy Balanced Precoding Design for SWIPT based Two-Way Relay Systems

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