Antenna array configurations for terrestrial backhaul links at Ka-band frequencies

Zetík, Rudolf; Steinmetz, Christian; Grossmann, Marcus; Landmann, Markus; Galdo, Giovanni Del

doi:10.23919/eucap.2017.7928110

Cited by 1 publication

(4 citation statements)

References 9 publications

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“…2) confirms the assumptions made on the required antenna size in [9]. The 1380-element stacked uniform circular array achieves an SNR of about 36 dB.…”

Section: A Signal-to-noise Ratiosupporting

confidence: 67%

“…2) ZFBS: Zero-forcing beam steering (ZFBS) steers a beam in the direction of the intended communication partner while placing nulls in the directions of the other stations [9]. The beamforming weights are derived by solving…”

Section: ) Pbsmentioning

confidence: 99%

“…Assuming a receiver noise power of −90 dBm, which is an optimistic estimate, an antenna gain of about 31 dBi is required at both ends of the link. In order to achieve such a high gain, a stacked uniform circular array of at least 1380 antennas (12 rings of 115 elements) must be employed [9].…”

Section: Link Budget and Scenariomentioning

confidence: 99%

“…All three stations are equipped with stacked uniform circular arrays [8] of the same size. The first and second algorithm, plain beam steering and zero-forcing beam steering [9], rely on limited channel knowledge while the third algorithm, block diagonalization [10], requires full channel-state information. We investigate the influence of direct (line-of-sight) and multi-path (non-lineof-sight) interferences in order to assess the importance of channel-state information for a wireless backhaul network in a realistic urban scenario.…”

Section: Introductionmentioning

confidence: 99%

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Interference mitigation in mm-wave backhaul networks with limited channel-state information

Schafer

Steinmetz

Zetík

et al. 2017

2017 IEEE International Conference on Microwaves, Antennas, Communications and Electronic Systems (COMCAS)

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Abstract-Our goal is to identify if limited channel-state information is sufficient in order to mitigate interferences between the stations of a wireless mobile backhaul network, which is especially of great importance if the network employs full-duplex operation or terrestrial and satellite links sharing the same spectrum. We analyze and compare the signal-to-interferenceand-noise ratio of plain beam steering and zero-forcing beam steering for a millimeter-wave backhaul network with limited channel-state information where only the positions of the stations are known, while buildings and other possible sources of multipath components are unknown. Numerical analyses based on raytracing in a realistic urban scenario reveal that zero-forcing beam steering outperforms plain beam steering by about 12 dB. Furthermore, we compare the steering approaches to block diagonalization with full channel-state information as a reference. For low noise situations as in wide-band communications, zeroforcing beam steering can achieve a similar signal-to-noise-andinterference ratio to block diagonalization. We conclude that knowing the positions of wireless backhaul stations obviates the need for expensive channel estimation.

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“…2) confirms the assumptions made on the required antenna size in [9]. The 1380-element stacked uniform circular array achieves an SNR of about 36 dB.…”

Section: A Signal-to-noise Ratiosupporting

confidence: 67%

Section: ) Pbsmentioning

confidence: 99%

Section: Link Budget and Scenariomentioning

confidence: 99%