Cost-, Spectrum-, and Energy-Efficient Distributed Collaborative Beamforming Designs for Real-World Applications

Many impediments stand between the exciting concept of distributed collaborative beamforming (DCB) and its real-world and wide-use applicability. In this paper, we present novel DCB designs, obtained in closed form, that do not require any data exchange between terminals, yet properly cope, as dictated by a broad range of applications, with both scattered and interfered multi-antenna dual-hop transmissions under different power constraints. We also analyze the performance of these new DCB designs in terms of SNR and link-level throughput, both by newly established theoretical closed-form expressions and simulations to illustrate their spectrum, power, and computational-cost efficiencies in real-world operating conditions that account for various implementation imperfections.