NTT DOCOMO and Rohde & Schwarz have joined forces to set up the world's first ultra-wideband channel sounder for mobile communications exceeding 100 GHz.
The two companies conducted radio wave propagation experiments at frequencies of up to 150 GHz. The frequency bands from 100 GHz to 300 GHz are expected to enable further high-speed and large-capacity communications for the next generation technology beyond 5G.
In the experiments, the two companies measured and analysed the effects of radio wave propagation characteristics and shielding effects in the mmWave range. In doing so, they pioneered new frequency bands and have contributed to the realisation of terabit-class mobile communication systems.
In the 100 GHz to 300 GHz frequency bands, wider bandwidths are available than those used for 5G. However, these higher mmWave frequency bands are strongly affected by persons, vehicles, trees and environmental conditions like rain. It is therefore necessary to research the influence of such objects on the radio wave propagation characteristics, the companies said.
Using test and measurement equipment from Rohde & Schwarz, DOCOMO has developed a novel ultra-wideband mmWave band channel sounder to measure radio wave propagation characteristics necessary for evaluating mmWave mobile communication systems exceeding 100 GHz. The measurement parameters include the propagation loss (degree of attenuation of radio waves), power delay profile (arrival time of radio waves) and angular profile (indicator of spread of radio wave arrival).
In the test system the R&S SMW200A signal generator together with the R&S SMZ frequency multiplier generate the mmWave bands, while the R&S FSW85 signal and spectrum analyser equipped with the R&S FS-Z170 analyse it with wide analysis bandwidth of up to 2 GHz. The setup offers a convenient user interface with a high-resolution multi-touch display that shows radio wave propagation characteristics in real-time.
In one experiment, the test system was placed in an anechoic (soundproof) chamber. DOCOMO and Rohde & Schwarz confirmed that they can measure and analyse the shielding effect of the human body, applying signals up to 150 GHz in all common 5G frequency bands currently in use or under consideration.
The Rohde & Schwarz technology group develops, produces and markets communications, information and security products for professional users, while NTT DOCOMO is a mobile operator in Japan with over 76 million subscriptions. It has contributed to developing 3G, 4G and 5G mobile network technologies.
The two companies conducted radio wave propagation experiments at frequencies of up to 150 GHz. The frequency bands from 100 GHz to 300 GHz are expected to enable further high-speed and large-capacity communications for the next generation technology beyond 5G.
In the experiments, the two companies measured and analysed the effects of radio wave propagation characteristics and shielding effects in the mmWave range. In doing so, they pioneered new frequency bands and have contributed to the realisation of terabit-class mobile communication systems.
In the 100 GHz to 300 GHz frequency bands, wider bandwidths are available than those used for 5G. However, these higher mmWave frequency bands are strongly affected by persons, vehicles, trees and environmental conditions like rain. It is therefore necessary to research the influence of such objects on the radio wave propagation characteristics, the companies said.
Using test and measurement equipment from Rohde & Schwarz, DOCOMO has developed a novel ultra-wideband mmWave band channel sounder to measure radio wave propagation characteristics necessary for evaluating mmWave mobile communication systems exceeding 100 GHz. The measurement parameters include the propagation loss (degree of attenuation of radio waves), power delay profile (arrival time of radio waves) and angular profile (indicator of spread of radio wave arrival).
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| Source: NTT DOCOMO. Experimental results of the influence of the human body at various frequencies. |
In one experiment, the test system was placed in an anechoic (soundproof) chamber. DOCOMO and Rohde & Schwarz confirmed that they can measure and analyse the shielding effect of the human body, applying signals up to 150 GHz in all common 5G frequency bands currently in use or under consideration.
The Rohde & Schwarz technology group develops, produces and markets communications, information and security products for professional users, while NTT DOCOMO is a mobile operator in Japan with over 76 million subscriptions. It has contributed to developing 3G, 4G and 5G mobile network technologies.
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