Soft-Decision-Aided, Smoothness-Constrained Channel Estimation over Time-Varying Fading Channels With No Channel Model Information

Yuan, Haifeng; Kam, Pooi Yuen

doi:10.1109/twc.2016.2618877

Cited by 10 publications

(2 citation statements)

References 31 publications

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“…Because the two equations in (17) and (18) can not be satisfied at the same time, they can be rewritten as (19) which is related to the sum of two absolute value functions. Therefore, the minimum solution of (19) is zero.…”

Section: Apa Scheme Based On Med Theorymentioning

confidence: 99%

“…For the MA and BC stages, the two APA schemes were proposed based on the maximum Euclidean distance (MED) and the max-min mutual information (MMMI) theories, respectively. In the MA stage, two source nodes use the channel estimation algorithm [18], [19] to obtain the channel state information (CSI). Subsequently, they adaptively calculate the transmission power to maximize the Euclidean distance of NC symbols received by relay nodes.…”

Section: Introductionmentioning

confidence: 99%

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Optimized Antenna Selection and Adaptive Power Allocation for Physical Layer Network Coding with Selective Soft-Message-Forward Cooperation

et al. 2020

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To improve the systematic bit error rate (BER) performance and power efficiency, an optimized antenna selection and adaptive power allocation scheme is proposed for physical layer network coding (PNC) with selective soft-message-forward (SSMF) cooperation. In this scheme, two adaptive power allocation (APA) schemes are proposed for the multiple access (MA) and broadcast (BC) stages, respectively. In the MA stage, the APA scheme aims to maximize the Euclidean distance of network coding symbols received by relay node. In the second BC stage, the relay node takes the maximization of the minimum mutual information of two source nodes as objective function. Then it uses the narrow range method (NRM) to select the optimal antenna set and equally allocates power to them. To further reduce the systematic complexity, an antenna set pre-selection is proposed. It minimizes the antenna number in the initial antenna set of the NRM based on the deletion standard which does not reduce the mutual information in the BC stage. Simulation results indicate that our APA schemes surpass the existing equal power allocation (EPA) scheme with a binary phase-shift keying modulation. Compared with current EPA scheme, the proposed APA schemes for the BC, MA and global stages obtain about 1 dB, 2 dB and 3.5 dB performance gains at BER of 10 −3 with two antennas in the relay node, respectively. INDEX TERMS Physical layer network coding, selective soft-message-forward, antenna selection, adaptive power allocation.

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Section: Apa Scheme Based On Med Theorymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%