The widespread availability of devices with multiple wireless interfaces and of heterogeneous positioning techniques open new market potentials for Location Based Services (LBSs), even if complicating their development.
This is when we decided to find techniques to integrate multiple wireless standard chips onto one microchip.
The original technique for serving multiple wireless users in a populated space, pioneered more than 40 years ago, was to divide the space into cells, each served by a separate base station.
Techniques for combining the multiple wireless data streams and discriminating valid scoring hits from non-scoring hits, such as blocked hits, are presented and discussed.
By using radio over fiber (ROF) techniques, the optical fiber is well adapted to propagate multiple wireless services having different carrier frequencies.
It is built to cater for multiple wireless standards.
Wireless USB connections allow multiple wireless devices in a close proximity to network and use a device connected directly to the wireless transmitter.
The wireless technique enables image sharing on multiple devices while a powerful database can provide valuable resources for training, data mining and serial case studies.
This article first presents the network infrastructure of the LTE-Advanced, and then provides an in-depth overview of enabling technologies from the physical layer aspects, including carrier aggregation, advanced multiple-input multiple-output (MIMO) techniques, wireless relays, enhanced inter-cell interference coordination (eICIC), and coordinated multipoint (CoMP) transmission/reception.
Two very important and active areas of wireless research are multihop relaying and multiple antenna techniques.
