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Propagation and Throughput Study for 802.16 Broadband Wireless Systems at 5.8 GHz

Propagation and Throughput Study for 802.16 Broadband Wireless Systems at 5.8 GHz. Thomas Schwengler & Niranjan Pendharkar. Radio Description. Latest revision of MAN, IEEE 802.16-2004. OFDM - 256 FFT with variable rate coding as well as modulation capabilities.

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Propagation and Throughput Study for 802.16 Broadband Wireless Systems at 5.8 GHz

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  1. Propagation and Throughput Study for 802.16 Broadband Wireless Systems at 5.8 GHz Thomas Schwengler & Niranjan Pendharkar

  2. Radio Description • Latest revision of MAN, IEEE 802.16-2004. • OFDM - 256 FFT with variable rate coding as well as modulation capabilities. • Line Of Sight, Near-Line of Sight operation. • Multiple access granted via time slots.

  3. Lab Testing • Radio performance tested on fixed SUI models. • High PAPR of OFDM signals present emulator tuning problems. • True WiMAX with 2048 sub-carriers may present even greater problem…

  4. Ethernet Traffic Generator BS Spirent SR5500 circulator PAD Ch. 1 Ch. 2 Air Interface Antenna SU SU SU SU Ethernet

  5. Urban Testing • True field tests without fading emulator, circulators, etc. • BS positioned atop a building (13 floors), SU’s placed 6-ft above ground at different locations in suburban area of Denver. • On-demand modulation.

  6. Results – Lab Tests • Throughput for 16-QAM modulation in SUI-1 and SUI-3 channels.

  7. Observation • Average throughput is almost constant despite differences in statistical behavior of various channels.

  8. Results – Field Tests • Statistical comparison of results in SUI-1 & SUI-3 channels in lab, and field tests.

  9. Observation • Throughput performance comparison for several modulation schemes in different fading environments

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