Mobile Communication System

الوصف

A mobile communication system with a base station and at least one mobile subscriber station including modulation means able to modulate a carrier wave with a request for access signal, and transmission means to transmit the thus obtained modulated carrier wave to said base station during a time slot of a time division multiple access structure. It is able to provide a mobile communication system with an improved spectral efficiency and a reduced possibility for collision,i.e. the probability that two (or more) subscribers transmit the substantially constant envelope signal within the same subslot and on the same pre-access carrier wave.

النواحي

In accordance with embodiments of the present invention, a swept laser source is provided that includes two cavities; a large cavity and a small cavity. The large cavity includes an active gain medium and could be formed by an optical fiber, free space and/or silicon. The small cavity includes a MEMS movable mirror to tune the output wavelength. The MEMS-based swept laser source can be used, for example, in applications that require fast wavelength sweeping without restrictions on single mode operation. For example, the MEMS-based swept laser source may be incorporated into a swept source optical coherence tomography system, which can provide in-depth imaging in many fields, such as medical imaging, process and quality control, multilayer coating inspection, 3D data storage, and spectroscopic applications.

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