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1 results

  • Experimental evaluation of real-time sigma-delta radio over fiber system for fronthaul applications

  • Muhammad Usman Hadi, Hyun Jung, Pier Andrea Traverso, Giovanni Tartarini
  • Journal:
    International Journal of Microwave and Wireless Technologies / Volume 13 / Issue 8 / October 2021
    Published online by Cambridge University Press:
    09 September 2020, pp. 756-765

  • Sigma-delta radio over fiber (ΣΔ-RoF) is an expedient technology for next-generation networks including 5G cloud/centralized radio access networks (C-RAN). In this article, we demonstrate a realistic experimental scenario for ΣΔ-RoF link targeting C-RAN fronthaul applications, by using baseband second-order 1-bit sigma-delta modulation (ΣΔ-M). The experimental set-up validates the LTE 20 MHz signals having modulation order of 256-quadrature amplitude modulation for a carrier frequency of 3 GHz, up to 10 km of standard single mode fiber. A detailed analysis of the ΣΔ-RoF system performance is reported by adjacent channel leakage ratio and error vector magnitude. Furthermore, an experimental study is evaluated where ΣΔ-RoF is compared with its counterparts. It is deduced that ΣΔ-RoF corroborates the present range of C-RAN fronthaul networks and can be a promising candidate for future mobile haul applications.