Wireless communications surpassing fiber capacity:micro- and millimeter-wave solutions up to D-band for 5G systems

\u3cp\u3eIn this paper, we present the latest experimental work on millimetre-wave links operating at fiber-like capacity regimes: from UWB communications supporting up to 35 Gbit/s to D-band communications operating at 352 Gbit/s. We provide insights on these technologies and hints on next steps to achieve 1 Tbit/s in the air.\u3c/p\u3

Reconfigurable radio-over-fiber networks [Invited]

\u3cp\u3eThis paper discusses the advantages of reconfigurable radio-over-fiber (RoF) networks and presents key activities in coherent remote access units, silicon photonics for microwave photonics, optical switching, and photonically reconfigurable antennas. These research areas enable functionalities that improve the utilization, flexibility, and performance of RoF networks.\u3c/p\u3

Silicon photonics integrated circuits for 5th generation mm-Wave wireless communications

Hybrid photonic-wireless transmission schemes in the mm-wave frequency are promising candidates to enable the multi-gigabit per second data communications required from wireless and mobile networks of the 5th and future generations. Photonic integration may pave the way to practical applicability of such photonic-wireless hybrid links by reduction in complexity, size and – most importantly – cost

All-optical packet compression by using an active vertical coupler based optical crosspoint switch matrix

We experimentally demonstrate all-optical packet compression for a RZ payload at 10 Gb/s to 40 Gb/s and a label at 155 Mb/s, sustaining only 1.8 dB of power penalty, based on a recirculating buffer with one individual optical crosspoint switc

Transmission of microwave signals beyond the modal bandwidth of multimode fiber links

Employing the optical frequency multiplication method, we present an experimental performance analysis of the generation of microwave carriers up to 40 GHz and their transmission over a 4.4 km multimode fiber link. Also, 16 QAM and 64 QAM radio signals up to 20MS/s symbol rate are recovered successfully in the 24-30 GHz band after 4.4 km multimode fiber transmission, complying with the transmitter constellation error requirements of wireless standard IEEE 802.11

Algorithm for hybrid optical fiber-wireless photonic channel allocation for millimeter-waveband 5G networks

This paper presents a performance assessment of an algorithm for hybrid fiber-wireless photonic channel allocation in 5G using radio-over-fiber with active delivery. Simulations show reductions of network blocking probability in 98% of the tested cases This paper presents a performance assessment of an algorithm for hybrid fiber-wireless photonic channel allocation in 5G using radio-over-fiber with active delivery. Simulations show reductions of network blocking probability in 98% of the tested cases

Overcoming modal bandwidth limitation in radio-over-multimode fiber links

Employing the optical frequency multiplication method, the theoretical modal bandwidth limitation of multimode fiber (MMF) can be overcome in radio-over-fiber links. The principle is analyzed theoretically and supported experimentally by generation and transmission of microwave carriers up to 40 GHz and 16- and 64-level quadrature-amplitude-modulated (QAM) radio signals in the 24- to 30-GHz band over 4.4-km MMF lin

FMWC radar for breath detection

We report on the experimental demonstration of an FMCW radar operating in the 25.7 - 26.6 GHz range with a repetition rate of 500 sweeps per second. The radar is able to track the breathing rate of an adult human from a distance of 1 meter. The experiments have utilized a 50 second recording window to accurately track the breathing rate. The radar utilizes a saw tooth modulation format and a low latency receiver. A breath tracking radar is useful both in medical scenarios, diagnosing disorders such as sleep apnea, and for home use where the user can monitor its health. Breathing is a central part of every human beings life as side effects from not breathing may include death. Breathing monitoring is often used in hospitals, however, the monitoring systems are usually based on physical contact with the patient. As a result, they are often a nuisance to the patient and they may even be disconnected. A better solution is contactless non-intrusive wireless measurement of the breathing. It is found that up to 20% of the population will suffer from sleep apnea. Sleep apnea has several health related drawback. Among them are several cardiovascular outcomes, increases illness- and accident- related cost for the health system. It is hard to detect sleep apnea it is beneficial to have a sleep monitoring system in homes of people in high risk zones. However, this system would have to be unobtrusive in order for people to accept to implement them while sleeping. The only really unobtrusive way is through wireless sensing as other systems rely on either measuring the airflow at the mouth and nose through a mask or with a stretchable wire around the chest.In this paper a wireless system that is able to measure the breath rate of a human from a distance is presented. The system is based on a commercially available radar chip which, through the use of a simple modulation scheme, is able to measure the breathing rate of an adult human from a distance. A high frequency output makes sure that the radar cannot penetrate solid obstacles which is a wanted feature in private homes where people therefore cannot measure breathingthrough walls. Other remote breath tracking systems has been presented that are based on the Ultra-wideband radar technique. However, these systems have two drawbacks. Firstly, they penetrate walls. It is therefore harder to contain the emitted radiation and they could be used for unsolicited monitoring of people that are unaware of the presence of the radar. Secondly the receiver is based on timing difference between received pulses. Therefore, the receiver has to operate at a high sampling rate in the order of GSa/s to accurately track breathing rates. This high sampling rate adds unwanted complexity and power consumption to the receiver side of the radar. This paper shows how a 25.7 - 26.6 GHz radar can be used to track the breathing rate of a human male. Through experimental verification it is shown how the received side can be improved through digital signal processing. We report on the experimental demonstration of an FMCW radar operating in the 25.7-26.6 GHz range with a repetition rate of 500 sweeps per second. The radar is able to track the breathing rate of an adult human from a distance of 1 meter. The experiments have utilized a 50 second recording window to accurately track the breathing rate. The radar utilizes a saw tooth modulation format and a low latency receiver. A breath tracking radar is useful both in medical scenarios, diagnosing disorders such as sleep apnea, and for home use where the user can monitor its health