Dynamic TDD and fixed cellular networks

Junsong Li, Shayan Farahvash, Mohsen Kavehrad, Reinaldo Valenzuela

Research output: Contribution to journalArticlepeer-review

60 Scopus citations


There are many benefits in using time division duplex (TDD) instead of frequency division duplex (FDD) schemes in fixed wireless cellular systems. To name a few; channel reciprocity for the single carrier frequency used on both up and downlinks will allow easy access to channel state information, reduced complexity of RF design, much higher flexibility in handling dynamic traffic, simpler frequency plan, etc. However, there exists a serious limiting factor in using dynamic-TDD (D-TDD) in cellular systems. This is due to a steady interference on uplinks in a cell, caused by downlink transmissions of other cells. Simulation results show in D-TDD cellular systems, performance is unacceptable, when omni-directional antenna is used at base stations. Simulation results have also demonstrated a great potential for smart antennas in fixed D-TDD bandwidth-on-demand wireless systems.

Original languageEnglish (US)
Pages (from-to)218-220
Number of pages3
JournalIEEE Communications Letters
Issue number7
StatePublished - Jul 2000

All Science Journal Classification (ASJC) codes

  • Modeling and Simulation
  • Computer Science Applications
  • Electrical and Electronic Engineering


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