Quality-based channel allocation scheme with predistortion in multi-channel radio over fiber system

Withawat Tangtrongpairoj, Yafei Hou, Takeshi Higashino, Minoru Okada

Research output: Contribution to journalArticlepeer-review


radio over Fiber (RoF) is a promising solution for providing wireless access services. Heterogeneous radio signals are transferred via an optical fiber link using an analog transmission technique. When the RoF and the radio frequency (RF) devices have a nonlinear characteristic, these will create the intermodulation products (IMPs) in the system and generate the intermodulation distortion (IMD). In this paper, the IMD interference in the uplink RF signals from the coupling effect between the downlink and the uplink antennas has been addressed. We propose a method using the dynamic channel allocation (DCA) algorithm with the predistortion (PD) technique to improve the throughput performance of the multi-channel RoF system. The carrier to distortion plus noise power ratio (CDNR) is evaluated for all channel allocation combinations; then the best channel combination is assigned as a set of active channels to minimize the effect of IMD. The results show that the DCA with PD has the lowest IMD and obtains a better throughput performance.

Original languageEnglish
Pages (from-to)563-573
Number of pages11
JournalIEICE Transactions on Electronics
Issue number5
Publication statusPublished - May 1 2016
Externally publishedYes


  • Intermodulation distortion
  • Predistortion dynamic channel allocation
  • Radio over Fiber

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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