Using commodity hardware platform to develop and evaluate CSMA protocols
Proceedings of the third ACM international workshop on Wireless network testbeds, experimental evaluation and characterization
Implementing a software-based 802.11 MAC on a customized platform
CCNC'09 Proceedings of the 6th IEEE Conference on Consumer Communications and Networking Conference
Software defined radio architecture using a multicasting network-on-chip
ICICS'09 Proceedings of the 7th international conference on Information, communications and signal processing
Design of low-complexity FFT processor for MIMO-OFDM based SDR systems
ICACT'10 Proceedings of the 12th international conference on Advanced communication technology
Scalable FFT processor for MIMO-OFDM based SDR systems
ISWPC'10 Proceedings of the 5th IEEE international conference on Wireless pervasive computing
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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.