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Enabling 6G Wireless Communications: UWB Characterization of Corridors within the H-Band

Juan E. Galeote-Cazorla, Alejandro Ramírez-Arroyo, Mauricio Rodríguez, Reinaldo Valenzuela, Juan F. Valenzuela-Valdés

Abstract

Future sixth-generation of wireless system is expected to provide data-rates in the order of 1 Tbps and latencies below 1 ms. Among others, one of the most promising strategies to meet these requirements is to operate at higher frequencies than millimeter wave bands: the THz bands. Nevertheless, because of the higher losses and the detriment of classical propagation mechanisms, deploying systems operating at these frequencies becomes a real challenge. Consequently, short-range scenarios are of special interest since these effects of THz bands can be managed. This work conducts an extensive campaign within corridors at frequencies within the H-band in the range from 250 GHz to 330 GHz. For the first time in literature, an ultra wideband of 80 GHz is studied simultaneously. Large scale effects are assessed by estimating and modeling path gain. The path gain exponent varies between -2.1 and -1.6, which is explained by a guiding effect also observed at millimeter wave bands. Small scale effects are also evaluated in terms of parameters such as rice $K$-factor, root mean squared delay spread and coherence bandwidth. Additionally, an analytical approximation based on the classical N-rays model is proposed obtaining an accurate representation of the wireless channel which is coherent with the empirical analysis. The full analysis reveals the suitability of these THz bands for deploying point-to-point links due to the predominance of the line-of-sight contribution respect to the reflected components.

Enabling 6G Wireless Communications: UWB Characterization of Corridors within the H-Band

Abstract

Future sixth-generation of wireless system is expected to provide data-rates in the order of 1 Tbps and latencies below 1 ms. Among others, one of the most promising strategies to meet these requirements is to operate at higher frequencies than millimeter wave bands: the THz bands. Nevertheless, because of the higher losses and the detriment of classical propagation mechanisms, deploying systems operating at these frequencies becomes a real challenge. Consequently, short-range scenarios are of special interest since these effects of THz bands can be managed. This work conducts an extensive campaign within corridors at frequencies within the H-band in the range from 250 GHz to 330 GHz. For the first time in literature, an ultra wideband of 80 GHz is studied simultaneously. Large scale effects are assessed by estimating and modeling path gain. The path gain exponent varies between -2.1 and -1.6, which is explained by a guiding effect also observed at millimeter wave bands. Small scale effects are also evaluated in terms of parameters such as rice -factor, root mean squared delay spread and coherence bandwidth. Additionally, an analytical approximation based on the classical N-rays model is proposed obtaining an accurate representation of the wireless channel which is coherent with the empirical analysis. The full analysis reveals the suitability of these THz bands for deploying point-to-point links due to the predominance of the line-of-sight contribution respect to the reflected components.
Paper Structure (9 sections, 28 equations, 13 figures, 3 tables)

This paper contains 9 sections, 28 equations, 13 figures, 3 tables.

Table of Contents

  1. Introduction
  2. Measurements Description
  3. Channel Sounder
  4. Corridor Scenarios
  5. N-rays Corridor Model
  6. Corridors Characterization and Comparison with N-rays Model
  7. Path Gain Analysis and Modeling
  8. Small Scale Effects
  9. Conclusion

Figures (13)

  • Figure 1: General scheme of the VNA-based frequency-domain channel sounder used for the measurements at the H-band.
  • Figure 2: Maximum antenna gain as a function of frequency.
  • Figure 3: Antenna gain patterns at the start, mid and end frequencies.
  • Figure 4: Panoramic view of the experimental setup in the CITIC-UGR corridor. Each white dot represents a Rx position spaced at intervals of 0.6 m.
  • Figure 5: Picture of the experimental setup in the CETIC-UGR corridor. The Rx positions are represented by dots spaced at intervals of 0.6 m.
  • ...and 8 more figures