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- Title
Joint Source-Relay Optimization for MIMO Full-Duplex Bidirectional Wireless Sensor Networks with SWIPT.
- Authors
Liu, Dan; Wen, Zhigang; Liu, Xiaoqing; Li, Shan; Zou, Junwei
- Abstract
The simultaneous wireless information and power transfer (SWIPT) technique has been considered as a promising approach to prolong the lifetime of energy-constraint wireless sensor networks (WSNs). In this paper, a multiple-input multiple-output (MIMO) full-duplex (FD) bidirectional wireless sensor network (BWSN) with SWIPT is investigated. Based on minimum total mean-square-error (total-MSE) criterion, a joint optimization problem for source and relay beamforming and source receiving subject to transmitting power and harvesting energy constraints is established. Since this problem is non-convex, an iterative algorithm based on feasible point pursuit-successive convex approximation (FPP-SCA) is derived to obtain a local optimum. Moreover, considering the scenarios in which source and relay nodes equipped with the same and different numbers of antennas, a low-complexity diagonalizing design-based scheme is employed to simplify each non-convex subproblem into convex problems and to reduce the computational complexity. Numerical results of the total-MSE and bit error rate (BER) are implemented to demonstrate the performance of the two different schemes.
- Subjects
COMBINED source-channel coding; MIMO systems; WIRELESS sensor networks; WIRELESS communications; MEAN square algorithms
- Publication
Sensors (14248220), 2019, Vol 19, Issue 8, p1827
- ISSN
1424-8220
- Publication type
Article
- DOI
10.3390/s19081827