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It has been reported [1], [2] that the number of transmitters that can be used in a MIMO system is limited by the coherence time of the channel.

With optics penetrating deep into the new broadband communication, switching and distribution systems and subsystems, the management of resulting increased connection density has emerged as a criti

Results are presented on a lateral current injection vertical cavity surface emitting laser (VCSEL) structure, the implant apertured, index guided VCSEL (I-2-VCSEL).

This article describes a small automatic P.B.X. made by the Bell Telephone Mfg. Co. of Antwerp.

Operators are currently considering the deployment of small cells to complement their macro-cellular networks and increase their coverage and capacity.

The small cell concept covers a number of different options from relatively high power outdoor micro cells to indoor pico cells and very low power femto cells.

Future wireless communication systems feature heterogeneous networks (HetNets), with small cells underlying existing macrocells.

This chapter covers the small cell enhancements introduced in Release 12 in third generation partnership project (3GPP) as well as the items on‐going for Release 13.

The deployment of small cells such as pico cells and micro cells poses new challenges.

"Any sufficiently advanced technology is indistinguishable from magic" - Arthur C. Clarke, Profiles of the Future.

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