Pre-equalization technique enabling 70 Gbit/s photonic-wireless link at 60 GHz

Abrecht, Felix C.; Bonjour, Romain; Welschen, Samuel; Josten, Arne; Baeuerle, Benedikt; Hillerkuss, D.; Burla, Maurizio; Leuthold, Juerg

doi:10.1364/oe.24.030350

Cited by 6 publications

(4 citation statements)

References 18 publications

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“…Employing a highly efficient wireless backhaul service by connecting multiple base stations with small cell size will ensure high data rate to the end users [38]. Thus, enabling photonics based wireless links (millimeter to THz frequency band) offers high efficiency and cost-effective solution to the mobile backhauling and 'last mile' connections [39][40][41]. Similarly, the THz communication systems can be used to establish short range high-speed wireless links for applications such as chip-to-chip communications, KIOSK downloading, high-speed indoor wireless LAN to name a few [42].…”

Section: Introductionmentioning

confidence: 99%

Live Streaming of Uncompressed HD and 4K Videos Using Terahertz Wireless Links

et al. 2018

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Taming the Terahertz waves (100 GHz-10 THz) is considered the next frontier in wireless communications. While components for the ultra-high bandwidth Terahertz wireless communications were in rapid development over the past several years, however, their commercial availability is still lacking. Nevertheless, as we demonstrate in this paper, due to recent advances in the microwave and infrared photonics hardware, it is now possible to assemble high performance hybrid THz communication systems for real-life applications. As an example, in this work, we present design and performance evaluation of the photonics-based Terahertz wireless communication system for the transmission of uncompressed 4K video feed that is built using all commercially available system components. In particular, two independent tunable lasers operating in the infrared C-band are used as a source for generating the Terahertz carrier wave using frequency difference generation in a photomixer. One of the IR laser beams carries the data which is intensity modulated using the LiNbO3 electro-optic modulator. A zero bias Schottky detector is used as the detector and demodulator of the data stream followed by the high-gain and low-noise pre-amplifier. The Terahertz carrier frequency is fixed at 138 GHz and the system is characterized by measuring the bit error rate for the pseudo random bit sequences at 5.5 Gbps. By optimizing the link geometry and decision parameters, an errorfree (BER<10 -10 ) transmission at a link distance of 1m is achieved. Finally, we detail integration of a professional 4K camera into the THz communication link, and demonstrate live streaming of the uncompressed HD and 4K video followed by analysis of the link quality.

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Section: Introductionmentioning

confidence: 99%

Live Streaming of Uncompressed HD and 4K Videos Using Terahertz Wireless Links

et al. 2018

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“…If that is the case, then the maximum OSSR achievable is approximately equal to the extinction ratio (ER) of the optical modulator [23]. For amplitude and phase channel response corrections, a digital pre-equalization technique such as the one presented in [24] can be used. For time-matching, two phase shifters may be placed in each electrical arm of the IQ-modulator.…”

Section: Generation Of Spectrally-efficient Thz Ssb Signals Throumentioning

confidence: 99%

Single Sideband Signals for Phase Noise Mitigation in Wireless THz-Over-Fibre Systems

Gonzalez-Guerrero

Shams

Fatadin

et al. 2018

J. Lightwave Technol.

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In future photonic-based THz backhaul links, integrating the optical local oscillator (LO) in a remote antenna unit can be beneficial in terms of optical bandwidth efficiency and higher compatibility with passive optical networks. In such a scenario, two approaches can be used to reduce the high phase noise associated with free-running lasers: 1) baseband (BB) signals & carrier recovery, and 2) single sideband (SSB) signals & envelope detection. In this paper, we compare the performance of the two approaches for various optical LO linewidths using 5 GBd 16-QAM signals. We find that, for a total linewidth wider than 0.55 MHz, the SSB approach yields better results. The superior performance, however, comes at the expense of reducing the net information spectral density (ISD) of the SSB signal by 39% compared to that of the BB signal. However, using signal-signal beat interference-mitigation algorithms, an ISD only 15% lower than the BB signal ISD was sufficient to meet the FEC requirement. Given these results, we believe that the envelope detection of SSB signals is a promising solution to mitigate the phase noise problem of THz links based on free-running lasers, without excessively compromising the spectral efficiency of the system. Index Terms-Broadband communication, digital signal processing, envelope detectors, microwave photonics, millimeter wave communication, optical mixing, photonic integrated circuits, semiconductor lasers.This work is licensed under a Creative Commons Attribution 3.0 License. For more information, see http://creativecommons.org/licenses/by/3.0/

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“…Using a bit-rate R b of 8 Gb/s, 4 channels, and 3 sectors, the aggregated capacity is 96 Gb/s. Recent research has shown even higher bitrates at millimeter wave frequencies, but mostly for point-to-point communication [17]- [22]. Yet, one of the main limiting factors for NG RAN at millimeter wave frequencies is the increased free space path loss that either reduces the reach of the access network or forces the utilization of beam steering systems.…”

Section: A Millimeter Wave Communicationsmentioning

confidence: 99%

Time-to-Space Division Multiplexing for Tb/s Mobile Cells

Bonjour

Welschen

Leuthold

2018

IEEE Trans. Wireless Commun.

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Space division multiplexing increases the capacity of mobile cells by reusing the frequencies in various directions. Yet, today's concepts scale badly to millimeter wave and therefore cannot provide Tb/s capacity. In this paper, we introduce timeto-space division multiplexing as a novel scheme to steer multiple beams simultaneously to different users. The main benefit of the proposed method relies in the fact that simple hardware can be used to generate the beams. In other words, it provides the advantages of space division multiplexing without relying on the complex array feeders that are usually required. Thanks to this advantage, the proposed technique can be easily combined with millimeter Wave systems as recently demonstrated.

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Pre-equalization technique enabling 70 Gbit/s photonic-wireless link at 60 GHz

Cited by 6 publications

References 18 publications

Live Streaming of Uncompressed HD and 4K Videos Using Terahertz Wireless Links

Live Streaming of Uncompressed HD and 4K Videos Using Terahertz Wireless Links

Single Sideband Signals for Phase Noise Mitigation in Wireless THz-Over-Fibre Systems

Time-to-Space Division Multiplexing for Tb/s Mobile Cells

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