IEEE 802.11 wireless LAN implemented on software defined radio with hybrid programmable architecture

Takashi Shono, Yushi Shirato, Hiroyuki Shiba, Kazuhiro Uehara, Katsuhiko Araki, Masahiro Umehira

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


This paper describes a prototype software defined radio (SDR) transceiver on a distributed and heterogeneous hybrid programmable architecture; it consists of a central processing unit (CPU), digital signal processors (DSPs), and pre/postprocessors (PPPs), and supports both Personal Handy Phone System (PHS), and IEEE 802.11 wireless local area network (WLAN). It also supports system switching between PHS and WLAN and over-the-air (OTA) software downloading. In this paper, we design an IEEE 802.11 WLAN around the SDR; we show the software architecture of the SDR prototype and describe how it handles the IEEE 802.11 WLAN protocol. The medium access control (MAC) sublayer functions are executed on the CPU, while the physical layer (PHY) functions such as modulation/demodulation are processed by the DSPs; higher speed digital signal processes are run on the PPP implemented on a field-programmable gate array (FPGA). The most difficult problem in implementing the WLAN in this way is meeting the short interframe space (SIFS) requirement of the IEEE 802.11 standard; we elucidate the potential weakness of the current configuration and specify a way of implementing the IEEE 802.11 protocol that avoids this problem. This paper also describes an experimental evaluation of the prototype for WLAN use, the results of which agree well with computer-simulation results.

Original languageEnglish
Pages (from-to)2299-2308
Number of pages10
JournalIEEE Transactions on Wireless Communications
Issue number5
Publication statusPublished - Sept 2005
Externally publishedYes


  • Hybrid programmable architecture
  • IEEE 802.11
  • Personal Handy Phone System (PHS)
  • Software defined radio (SDR)
  • Wireless communications
  • Wireless local area network (WLAN)

ASJC Scopus subject areas

  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Applied Mathematics


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