Geometric heuristics for rural Radio Maps approximation

Research output: Contribution to journalArticlepeer-review


Given a terrain T and an antenna A located on it, we would like to approximate the Radio Map of A over T, namely, to associate a signal strength for each point p ? T as received from A. This work presents a new Radio Map approximation algorithm using an adaptive radial sweep-line technique. The suggested radar-like algorithm (RLA) uses a pipe-line method for computing the signal strength along points on a ray, and an adaptive method for interpolating the signal strength over regions between two consecutive rays. Whenever the difference between two consecutive rays is above a certain threshold, a middle ray is created. Thus, the density of the sampling rays is sensitive to the shape of the terrain. Finally, we report on an experiment which compares the new algorithm with other well-known methods. The main conclusion is that the new RLA is significantly faster than the others, i.e., its running time is 3-15 times faster for the same approximation accuracy.

Original languageEnglish
Pages (from-to)215-237
Number of pages23
JournalJournal of Heuristics
Issue number2
StatePublished - Apr 2012


  • Approximating signal strength over large terrains
  • LTE
  • Radar-like algorithm
  • Radial sweep-line
  • Radio maps
  • WiMAX

All Science Journal Classification (ASJC) codes

  • Software
  • Information Systems
  • Computer Networks and Communications
  • Control and Optimization
  • Management Science and Operations Research
  • Artificial Intelligence


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