###### Abstract
The eighth paper, authored by [PERSON], [PERSON], and [PERSON], proposes a method for the determination of the probability of strictly determined multiservice resources in a group of resources [8]. The proposed method allows the authors to elaborate a new formula for calculating the blocking probability of strictly determined resources in systems servicing multiservice traffic, e.g., in a group of cells in 4G and 5G systems. The proposed formula, whose accuracy is verified via simulation, is an extension of the well-known Palm-Jacobaeus loss formula elaborated for systems with single-rate traffic. The ninth paper, authored by [PERSON], [PERSON], [PERSON], [PERSON], and [PERSON], studies both analytically and through simulation the downlink of an orthogonal frequency division multiplexing based cell that services multirate traffic [9]. The call arrival process is random (Poisson) or quasi-random. To determine congestion probabilities and resource utilization, the cell is modeled as a multirate loss model, while the call admission is based on three different policies--restricted accessibility, bandwidth reservation, and complete sharing policies. In all three policies, recursive formulas are proposed for the determination of the various performance measures. The 10 th paper, authored by [PERSON], [PERSON], [PERSON], [PERSON], [PERSON], [PERSON], and [PERSON], proposes a discrete, non-stationary, multiple-input-multiple-output (MIMO) channel model suitable for the fixed-point realization on the field-programmable gate array (FPGA) hardware platform [10]. To this end, the authors develop a flexible hardware architecture with configurable channel parameters and implement it on a non-stationary MIMO channel emulator in a single FPGA chip. In addition, an improved non-stationary channel emulation method is employed to guarantee accurate channel fading and phase, and the schemes of other key modules are also illustrated and implemented in a single FPGA chip. Hardware tests presented by the authors show that the output statistical properties of the proposed MIMO channel emulator agree well with the corresponding theoretical ones. The 11 th paper, authored by [PERSON], [PERSON], [PERSON], [PERSON], [PERSON], and [PERSON], studies and analyzes existing results about secure device-to-device (D2D) communication systems in terms of their security considerations and limitations [11]. In addition, a secure D2D communication system is proposed with the aim to address the security challenges and limitations of the existing results. The proposed secure D2D communication system was designed based on elliptic curve cryptography and lightweight authenticated encryption with associated data ciphers to cover resource-constrained IoT devices. The 12 th paper, authored by [PERSON], [PERSON], and [PERSON], studies the applicability of time division multiple access beamforming for future communication systems [12]. The authors propose the Sl-beamforming scheme for line-of-sight small cell systems in the LTE architecture. Simulation results show that the proposed scheme enhances the network signal to interference plus noise ratio and user average throughput, compared with non-dominantly interfered region schemes. The 13 th paper, authored by [PERSON] and [PERSON], proposes a novel time-varying least mean square adaptive filtering algorithm, with the aim to cancel the self-interference of near-end transceivers in co-frequency co-time full-duplex (CCFD) systems of the radio frequency domain [13]. The proposed algorithm solves the problem of strong self-interference of the radio frequency domain in CCFD systems by cooperatively controlling the autocorrelation values between the time factor and the error signal, to update the step size of the algorithm and provide a better quality of service for 5G communication networks. The 14 th paper, authored by [PERSON], [PERSON], [PERSON], and [PERSON], proposes a space-time, coded, orthogonal transform division multiplexing (STC OTDM) technique for 5G applications [14].