Multi-User Wireless Information and Power Transfer in FBMC-Based IoT Networks

Abstract

In order to address the shortcomings of orthogonal frequency division multiplexing (OFDM) and extend the lifetime of energyconstrained Internet-of-Things (IoT) devices, the combination of filter bank multi-carrier (FBMC) and simultaneous wireless information and power transfer (SWIPT) is investigated in this paper. Specifically, a multiuser FBMC-based SWIPT system is proposed in which user nodes (UNs) have the capability for both energy harvesting (EH) and information decoding (ID) with the aid of separate antennas. A practical non-linear EH model, which considers the saturation effects of the EH circuit, is considered. The information receiver at both the UNs and base station (BS) adopts an iterative interference cancellation (IIC) receiver to cancel the intrinsic interference in the demodulated FBMC signal. A sum-rate maximization problem is solved to jointly optimize parameters such as time, power, and weight allocations. Sub-optimal schemes are proposed for comparison. Numerical results show that the optimal solution significantly outperforms the sub-optimal methods in terms of achievable sum-rate and amount of harvested energy. Moreover, the results show that the proposed algorithm converges within a few iterations. Index Terms-Filter bank multi-carrier (FBMC), simultaneous wireless information and power transfer (SWIPT), time division multiple access (TDMA), sum-rate maximization, Internet-of-Things (IoT) networks.

Continuous unconstrained PSO‐PTS strategy to maximize HPA energy efficiency for FBMC‐OQAM systems

“…Still, its out‐of‐band [7] distortion on adjacent sub‐carriers prevents it from persisting in being employed in high frequency network systems. The enhanced multi‐carrier scheme Filter Bank Multicarrier with Offset Quadrature Amplitude Modulation(FBMC‐OQAM) [8] utilises prototype filter banks while transmitting signals so that the signal has the characteristics of low‐side‐lobes and low out‐of‐band radiation [9], which improves the overall spectral efficiency and can be employed in a variety of application scenarios. However, FBMC‐OQAM has a high Peak to average ratio (PAPR) [10] issue due to the inherent shortcomings of signal distribution in the multi‐carrier systems, which demands the high‐power amplifier (HPA) to retain a high dynamic range [11] or the signal will function in the non‐limited area [12], resulting in in‐band distortion and radiation, signal distortion and adjacent frequency interference, and deterioration of bit error rate(BER), modulation error rate(MER) [13] and other signal quality evaluation indicators.…”

Filter Bank Multicarrier Modulation Techniques for 5G and Beyond Wireless Communication Systems

“…It combined the concept of Multiple Input Multiple Output (MIMO) with orthogonal frequency Division Multiplexing (OFDM) 4G promoted mobile internet services and provided services to smartphones. Table I enumerates different generations of mobile communication with types of services offered [4].…”