A novel optical beamformer concept is introduced that can be used for seamless control of the reception angle in broadband wireless receivers employing a large phased array antenna (PAA). The core this an beamforming network (OBFN), using ring resonator-based delays, and coherent combining. electro-optical conversion performed by means single-sideband suppressed carrier modulation, common laser, Mach-Zehnder modulators, sideband filter after OBFN. unmodulated laser signal then re-injected...

An experimental prototype is presented that illustrates the implementation aspects and feasibility of novel ring resonator-based optical beamformer concept has been developed analyzed in Part I this paper . This can be used for seamless control reception angle broadband wireless receivers employing a large phased array antenna (PAA). The design, fabrication, characterization dedicated chip are described, which an 8 × 1 beamforming network, sideband filter single-sideband suppressed carrier...

Optical ring resonators (ORRs) are good candidates to provide continuously tunable delay in optical beam forming networks (OBFNs) for phased array antenna systems. Delay and splitting/combining elements can be integrated on a single chip form an OBFN. A state-of-the-art resonator-based 1times 8 OBFN has been fabricated complementary metal-oxide-semiconductor-compatible waveguide technology. binary tree topology is used the network such that different number of ORRs cascaded generation at...

The physical motivation and interpretation of the stochastic propagation channel model Saleh Valenzuela are discussed in detail. This mainly relies on assumptions properties positions transmitter, receiver scatterers environment, frequency range that is covered by model. Some these break down when application extended from wideband to ultra-wideband channels. Another important difference between contexts spatial scale over which fluctuate transmitter or moved. further illustrated analyzing...

We present a novel device-free stationary person detection and ranging method, that is applicable to ultra-wide bandwidth (UWB) networks. The method utilizes fixed UWB infrastructure does not require training database of template waveforms. Instead, the capitalizes on fact human presence induces small low-frequency variations stand out against background signal, which mainly affected by wideband noise. analyze probability, validate our findings with numerical simulations experiments...

Realizing inter-satellite links is a must for ensuring the success of cubesat swarm missions. Nevertheless, it has hardly been considered until now. The communication systems cubesats have to deal with few peculiar demands regarding consumed power, geometry and throughput. Depending on type application, required data rates can go up tens megabits per second, while power consumption physical size are limited by platform. proposed scheme will combine power-efficient modulation channel coding...

We present a new class of low-loss integrated optical waveguide structures as CMOS-compatible industrial standard for photonic integration on silicon or glass. A TriPleXTM is basically formed by -preferably rectangular- nitride (Si₃N₄) shell filled with and encapsulated dioxide (SiO₂). The constituent materials are low-cost stoichiometric LPVCD end products which very stable in time. Modal characteristics, birefringence, footprint size insertion loss...

For enhanced communication on board of aircraft novel antenna systems with broadband satellite-based capabilities are required. The installation such requires the development a very low-profile antenna, which can point to satellites anywhere in upper hemisphere. To this end, phased array antennas conformal fuselage attractive. In paper two key aspects arrays addressed: Ku-band and beam synthesis for antennas. elements stacked patch dual linear polarization have sufficient bandwidth. forming...

For enhanced communication on board an aircraft, novel antenna systems with broadband satellite-based capabilities are required. The technology will enhance airline operations by providing in-flight connectivity for flight crew information and bring live TV highspeed Internet to passengers. installation of such aircraft requires aerodynamic reasons the development a very low-profile antenna, which can point satellites anywhere in upper hemisphere. To this end, phased array antennas conformal...

A novel beam steering mechanism for a phased array antenna receiver system is introduced. The core of the ring resonator-based integrated optical forming network chip. Its principles are explained and demonstrated by presenting some measurement results. architecture around chip based on combination frequency down conversion, filter-based single sideband modulation balanced coherent detection. It proven that such an has significant advantages with respect to straightforward using double...

Optical ring resonators (ORRs) can be used as continuously tunable delay elements in a beam forming network for phased-array antenna system. The bandwidth of such enhanced by cascading multiple ORRs. When delays and splitting/combining circuitry are integrated one optical circuit, an (OBFN) is obtained. In this paper, the principles using ORRs explained demonstrated, presenting measurements on 1times4 OBFN chip, realized LPCVD waveguide technology. To our knowledge, first single-chip...

Because of its superior time resolution, ultra-wide bandwidth (UWB) transmission can be a highly accurate technique for ranging in indoor localization systems. Nevertheless, the presence obstructions may deteriorate performance system. Indoor environments are often densely populated with people. However, t h e effect human body has been scarcely investigated so far within UWB context. In this work, we investigate by conducting measurements and analyzing Two measurement campaigns were...

Passive person detection and localization is an emerging area in UWB systems, whereby people are not required to carry any ranging device. Based on experimental data, we propose a novel method detect static persons the absence of template waveforms, compute distances these persons. Our makes very little assumptions environment can achieve performances order 50 cm, using off-the-shelf devices.

For enhanced communication on board aircraft, novel antenna systems with broadband satellite-based capabilities are required. The technology will enhance airline operations by providing in-flight connectivity for flight crew information and bring live TV high-speed Internet to passengers. installation of such aircraft requires aerodynamic reasons the development a very low-profile antenna, which can point satellites anywhere in upper hemisphere. Major keystones success steerable antennas...

A novel phased array receive antenna steering system is introduced. The core of this an optical ring resonator-hased broadband, continuously tunable beam forming network (OBFN). In the proposed architecture, filter-based single-sideband suppressed-carrier modulation and balanced coherent detection are used. Such architecture has significant advantages over a straightforward using double-sideband direct detection, namely relaxed bandwidth requirements on modulators detectors, reduced...

Coherence multiplexing (CM) is a specific form of CDMA that particularly suitable for optical communication systems medium data rates and small distances. By virtue its potentially simple implementation, it useful "bridging the last mile" to subscribers, which an issue receiving considerable attention in research nowadays. The receivers coherence multiplex published so far were all based on either self-homodyne or self-heterodyne detection. Both solutions are rather complicated, therefore,...

A squint-free, continuously tunable optical beamformer system for phased array receive antennas is proposed and experimentally demonstrated, which involves an integrated ring resonator-based beam forming network, filter-based SSB-SC modulation balanced coherent detection.

An optical phase synchronization system using a power feedback loop technique is experimentally demonstrated. The allows coherent combining of signals modulated on the same carrier in hybrid beam forming setup.