Numerous researchers have studied innovations in future sixth-generation (6G) wireless communications. Indeed, a critical issue that has emerged is to contend with society's insatiable demand for high data rates and massive 6G connectivity. Some scholars consider one innovation be break-through-the application of free-space optical (FSO) communication. Owing its exceedingly carrier frequency/ba...

One of the most important points in a supply chain is customer-driven modeling, which reduces the bullwhip effect in the supply chain, as well as the costs of investment on the inventory and efficient transshipment of the products. Their homogeneity is reflected in the Inventory Routing Problem, which is a combination of distribution and inventory management. This paper expands the classical In...

Vehicle routing problems have various extensions such as time windows, multiple vehicles, backhauls, simultaneous delivery and pick-up, etc. The objectives of all these problems are to design optimal routes minimizing total distance traveled, minimizing number of vehicles, etc that satisfy corresponding constraints. In this study, an ant colony optimization based heuristic that can be used to s...

Mobile broadband services have become a big success over the last several years. Innovative, smart handsets have caused explosive traffic growth which has led to a severe capacity shortage. Since the majority of traffic originates from indoor locations or hotspots, significant investment in indoor wireless infrastructure is predicted in order to resolve the capacity problem. While existing publ...

Massive deployment of small-cell base stations (SBSs) is going to play a key role for capacity and coverage enhancements in 5G networks. However, the backhaul for these networks remains one of the important issue to solve. Ideally, the capacity of backhaul has to be in the same order of wireless links in order to avoid bottlenecks in the delivery and sustain huge traffic generated by mobile use...

Advanced Architectures for Efficient mm-Wave CMOS Wireless Transmitters by Jiashu Chen Doctor of Philosophy in Engineeing Electrical Engineeing and Computer Sciences University of California, Berkeley Professor Ali M. Niknejad, Chair With fast growing consumer demand for high speed mobile data capacity, wireless spectrum has become increasingly precious. This drives the evolution of the persona...

he widespread availability and demand for multime-dia capable devices and multimedia content have fueled the need for high-speed wireless connectivity beyond the capabilities of existing commercial standards. While fiber optic data transfer links can provide multi-gigabit-per-second data rates, cost and deployment are often prohibitive in many applications. Wireless links, on the contrary, can ...

Millimeter-Wave/Terahertz Circuits and Systems for Wireless Communication by Siva Viswanathan Thyagarajan Doctor of Philosophy in Electrical Engineering and Computer Sciences University of California, Berkeley Professor Ali M. Niknejad, Chair The ubiquitous use of electronic devices has led to an explosive increase in the amount of data transfer across the globe. Several applications such as me...

The Vehicle Routing Problem (VRP) is an hard and very well-known combinatorial optimization problem which finds many practical applications in the design and management of distribution systems. The VRP is concerned with the design of the optimal routes used by a fleet of identical vehicles stationed at a central depot to serve a set of customers with known demands. In the basic version of the p...