A summary of results obtained for radio over multimode fiber links and system demonstrations is p... more A summary of results obtained for radio over multimode fiber links and system demonstrations is presented. It is stated that when using low-cost technologies such as pre-installed MMF and VCSELs, although adequate link performance is achievable, with careful design when taking into account the wireless path, MAC protocol effects may need to be considered for WLAN operation. For the simultaneous transmission of multiple signals, practical considerations of crosstalk and interference may cause an increase in the necessary complexity of remote antenna units
IEEE Transactions on Microwave Theory and Techniques, 2007
... Using Vertical-Cavity Surface-Emitting Lasers for Millimeter-Wave Wireless Communications Ant... more ... Using Vertical-Cavity Surface-Emitting Lasers for Millimeter-Wave Wireless Communications Anthony Nkansah, Anjali Das, Nathan J. Gomes, Senior Member, IEEE, and Pengbo Shen ... 55, NO. 6, JUNE 2007 Anjali Das received the B.Sc. (Honors) and M.Sc. ...
An experimental investigation of the influence of the fiber distribution of wireless LAN (WLAN) s... more An experimental investigation of the influence of the fiber distribution of wireless LAN (WLAN) signals on throughput performance is presented. Transmission using different mediumaccess-control mechanisms and IEEE 802.11b and 802.11g physical layers is considered, and results are compared with those from the corresponding simulations in a commercial event-driven network simulator (OPNET). Performance of the WLAN-overfiber network in the presence of multiple clients is also analyzed. This paper confirms that a fiber delay does not significantly affect the performance obtained by fragmentation mechanism. Furthermore, when multiple antenna units are fed by a single access point, it is demonstrated that the presence of hidden nodes can cause the performance of WLAN-over-fiber networks to deteriorate. Finally, it is shown that the request-to-send/clear-to-send mechanism can be utilized to mitigate the negative effects associated with the hidden node problem.
Page 1. VCSEL-based Single-mode and Multimode Fiber Star/Tree Distribution Network for Millimeter... more Page 1. VCSEL-based Single-mode and Multimode Fiber Star/Tree Distribution Network for Millimeter-wave Wireless Systems Anthony Nkansah, Anjali Das, Nathan J. Gomes, Pengbo Shen and David Wake Broadband and ...
IEEE Transactions on Microwave Theory and Techniques, 2006
A low-cost option for transporting global system for mobile communication, Universal Mobile Telec... more A low-cost option for transporting global system for mobile communication, Universal Mobile Telecommunication System and wideband local area network (WLAN) signals using multimode fiber (MMF) with 850-nm vertical-cavity surface-emitting lasers (VCSELs) is investigated through range predictions from a link budget analysis. These predictions are experimentally verified for WLAN signal transmission in an office environment, using a commercial access point and
A summary of results obtained for radio over multimode fiber links and system demonstrations is p... more A summary of results obtained for radio over multimode fiber links and system demonstrations is presented. It is stated that when using low-cost technologies such as pre-installed MMF and VCSELs, although adequate link performance is achievable, with careful design when taking into account the wireless path, MAC protocol effects may need to be considered for WLAN operation. For the simultaneous transmission of multiple signals, practical considerations of crosstalk and interference may cause an increase in the necessary complexity of remote antenna units
IEEE Transactions on Microwave Theory and Techniques, 2007
... Using Vertical-Cavity Surface-Emitting Lasers for Millimeter-Wave Wireless Communications Ant... more ... Using Vertical-Cavity Surface-Emitting Lasers for Millimeter-Wave Wireless Communications Anthony Nkansah, Anjali Das, Nathan J. Gomes, Senior Member, IEEE, and Pengbo Shen ... 55, NO. 6, JUNE 2007 Anjali Das received the B.Sc. (Honors) and M.Sc. ...
An experimental investigation of the influence of the fiber distribution of wireless LAN (WLAN) s... more An experimental investigation of the influence of the fiber distribution of wireless LAN (WLAN) signals on throughput performance is presented. Transmission using different mediumaccess-control mechanisms and IEEE 802.11b and 802.11g physical layers is considered, and results are compared with those from the corresponding simulations in a commercial event-driven network simulator (OPNET). Performance of the WLAN-overfiber network in the presence of multiple clients is also analyzed. This paper confirms that a fiber delay does not significantly affect the performance obtained by fragmentation mechanism. Furthermore, when multiple antenna units are fed by a single access point, it is demonstrated that the presence of hidden nodes can cause the performance of WLAN-over-fiber networks to deteriorate. Finally, it is shown that the request-to-send/clear-to-send mechanism can be utilized to mitigate the negative effects associated with the hidden node problem.
Page 1. VCSEL-based Single-mode and Multimode Fiber Star/Tree Distribution Network for Millimeter... more Page 1. VCSEL-based Single-mode and Multimode Fiber Star/Tree Distribution Network for Millimeter-wave Wireless Systems Anthony Nkansah, Anjali Das, Nathan J. Gomes, Pengbo Shen and David Wake Broadband and ...
IEEE Transactions on Microwave Theory and Techniques, 2006
A low-cost option for transporting global system for mobile communication, Universal Mobile Telec... more A low-cost option for transporting global system for mobile communication, Universal Mobile Telecommunication System and wideband local area network (WLAN) signals using multimode fiber (MMF) with 850-nm vertical-cavity surface-emitting lasers (VCSELs) is investigated through range predictions from a link budget analysis. These predictions are experimentally verified for WLAN signal transmission in an office environment, using a commercial access point and
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