Let F be a compact subset of the n-dimensional Euclidean space Rn represented by (finitely or infinitely many) quadratic inequalities. We propose two methods, one based on successive semidefinite programming (SDP) relaxations and the other on successive linear programming (LP) relaxations. Each of our methods generates a sequence of compact convex subsets Ck (k = 1, 2, . . . ) of Rn such that (...

in this paper, we propose a successive approximation method based on fuzzy wavelet like operator to approximate the solution of linear fuzzy fredholm integral equations of the second kind with arbitrary kernels. we give the convergence conditions and an error estimate. also, we investigate the numerical stability of the computed values with respect to small perturbations in the first iteration....

Abstract Consider general minimum variance distortionless response (MVDR) robust adaptive beamforming problems based on the optimal estimation for both desired signal steering vector and interference‐plus‐noise covariance (INC) matrix. The beamformer design problem is an array output power maximization problem, subject to three constraints vector, namely, a (convex or nonconvex) quadratic const...

The combination of time division multiple access (TDMA) and non-orthogonal (NOMA), referred to as hybrid TDMA-NOMA system, is considered a potential solution meet the unprecedented requirements for future wireless networks. While recent resource allocation techniques aiming individually maximize either spectral efficiency (SE) or energy (EE), this paper considers an SE-EE trade-off based techni...

Non-orthogonal unmanned aerial vehicle (UAV)-aided secure downlink transmissions are investigated. A single-antenna UAV serves multiple ground users in the face of colluding eavesdroppers (EVs) and only imperfect location information EVs is available. Specially, a power splitting based non-orthogonal transmission scheme considered, where transmit divided into two parts for transmitting confiden...

Multiuser techniques play a central role in the fifth-generation (5G) and beyond 5G (B5G) wireless networks that exploit spatial diversity to serve multiple users simultaneously same frequency resource. It is well known multi-antenna base station (BS) can efficiently number of not exceeding antennas at BS via precoding design. However, when there are more than BS, conventional design methods pe...