Ahmed, B. T., and M. C. Ramon,  "Downlink capacity and interference statistics of wideband code division multiple access microcells for trains in long tunnels",  Communications, IET, vol. 3, no. 4, pp. 603-609, April, 2009.

Ahmed, B. T., and M. C. Ramon,  "WiMAX in high altitude platforms (HAPs) communications over large cities",  Systems, Signals and Devices, 2009. SSD '09. 6th International Multi-Conference on, pp. 1-4, March, 2009.

Ahmed, B. T., and M. C. Ramon,  "On the Impact of Ultra-Wideband (UWB) on Macrocell Downlink of UMTS and CDMA-450 Systems",  Electromagnetic Compatibility, IEEE Transactions on, vol. 50, no. 2, pp. 406-412, May, 2008.

Ahmed, B. T., M. C. Ramon, and L. H. Ariet,  "On the Impact of Ultra Wide Band (UWB) System on Macrocell Downlink of IS-136 Systems",  Wireless Communication Systems, 2006. ISWCS '06. 3rd International Symposium on, pp. 645-649, Sept, 2006.

Ahmed, B. T., M. C. Ramon, and L. H. Ariet,  "On the UMTS-HSDPA in High Altitude Platforms (HAPs) Communications",  Wireless Communication Systems, 2006. ISWCS '06. 3rd International Symposium on, pp. 704-708, Sept, 2006.

Ahmed, B. T., M. C. Ramon, and L. H. Ariet,  "LEO satellite W-CDMA downlink pole capacity",  Wireless Technology, 2004. 7th European Conference on, pp. 173-176, Oct, 2004.

Ahmed, B. T., M. C. Ramon, and L. de Haro y Ariet,  "On the capacity and interference statistics of street W-CDMA cross-shaped micro cells in Manhattan environment (uplink analysis)",  Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual, vol. 1, pp. 107-111 vol.1, April, 2003.

Ahmed, B. T., M. C. Ramon, and de. Haro L Ariet,  "On the capacity of air-ground W-CDMA system (downlink analysis)",  Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual, vol. 1, pp. 103-106 vol.1, April, 2003.

Ahmed, B. T., M. C. Ramon, and de. Haro L Ariet,  "Comments on the hybrid model for propagation loss prediction in tunnels",  Antennas and Propagation Magazine, IEEE, vol. 45, no. 5, pp. 156-158, Oct, 2003.

Ahmed, B. T., M. C. Ramon, and L. H. Ariet,  "Quasi-optimum downlink power control of high altitude platform W-CDMA system",  Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual, vol. 4, pp. 2476-2479 vol.4, April, 2003.

Ahmed, B. T., M. C. Ramon, and L. de Haro y Ariet,  "The capacity of air-ground W-CDMA system (uplink analysis)",  Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on, vol. 1, pp. 335-338 vol.1, Sept, 2002.

Ahmed, B. T., M. C. Ramon, and de. Hao L Ariet,  "Partial overlay of intelligent FDSS on microwave point to point link using subchannel suppression, downlink analysis of the FDSS system",  Personal, Indoor and Mobile Radio Communications, 2002. The 13th IEEE International Symposium on, vol. 2, pp. 770-773 vol.2, Sept, 2002.