Blar i NTNU Open på forfatter "Al-Samman, Ahmed"
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Buffer Delay Improvement in Gait-Cycle-Driven Transmission Power Control Scheme for WBAN
Mohamed, Marshed Kassim; Cheffena, Michael; Ai, Yun; Al-Samman, Ahmed (Peer reviewed; Journal article, 2020)Due to the dynamic nature of the wireless body area network (WBAN) channels, there is a need for dynamic transmission power control (TPC) to increase their energy efficiency. The existing gait-cycle-driven TPC (G-TPC) ... -
Indoor Channel Estimation Using Single-Snapshot Wideband Measurement
Ai, Yun; Cheffena, Michael; Mohamed, Marshed Kassim; Al-Samman, Ahmed (Chapter, 2020)The successful design of communication systems generally requires knowledge of various channel characteristic parameters. This paper utilizes the reverberation time extracted from single-snapshot wideband measurement to ... -
Millimeter Wave Propagation Measurements and Characteristics for 5G System
Al-Samman, Ahmed; Azmi, Marwan Hadri A; Al-Gumaei, Y. A.; Al-Hadhrami, Tawfik; Rahman, Tharek Abd.; Fazea, Yousef; Al-Mqdashi, Abdulmajid (Journal article; Peer reviewed, 2020)In future 5G systems, the millimeter wave (mmWave) band will be used to support a large capacity for current mobile broadband. Therefore, the radio access technology (RAT) should be made available for 5G devices to help ... -
Non-Cooperative Power Control Game in D2D Underlying Networks with Variant System Conditions
Al-Samman, Ahmed (Journal article; Peer reviewed, 2019)In this paper, the problem of power control using a game theoretic approach based on sigmoid cost function is studied for device-to-device (D2D) communications underlying cellular networks. A non-cooperative game, where ... -
On Hybrid-ARQ-Based Intelligent Reflecting Surface-Assisted Communication System
Ai, Yun; Mohamed, Marshed Kassim; Kong, Long; Al-Samman, Ahmed; Cheffena, Michael (Peer reviewed; Journal article, 2021)The intelligent reflecting surface (IRS) is an emerging technique to extend the wireless coverage. In this letter, the performance of hybrid automatic repeat request (hybrid-ARQ) for an IRS-assisted system is analyzed. ... -
Performance of Full-DuplexWireless Back-Haul Link Under Rain Effects Using E-Band 73 GHz and 83 GHz in Tropical Area
Al-Samman, Ahmed; Mohamed, Marshed Kassim; Cheffena, Michael; Azmi, Marwan Hadri; Rahman, Tharek Abd. (Peer reviewed; Journal article, 2020)This paper presents rain attenuation effects on the performance of the full-duplex link in a tropical region based on one-year measurement data at 73.5- and 83.5-GHz E-band for distances of 1.8 km (longer links) and 300 m ... -
Radio Propagation Measurements in the Indoor Stairwell Environment at 3.5 and 28 GHz for 5G Wireless Networks
Al-Samman, Ahmed; Mohamed, Marshed Kassim; Cheffena, Michael (Journal article; Peer reviewed, 2020)To cover the high demand for wireless data services for different applications in the wireless networks, different frequency bands below 6 GHz and in millimeter-wave (mm-Wave) above 24 GHz are proposed for the fifth ... -
Rain Attenuation Measurements and Analysis at 73 GHz E-Band Link in Tropical Region
Al-Samman, Ahmed; Mohamed, Marshed Kassim; Ai, Yun; Cheffena, Michael; Azmi, Marwan Hadri; Rahman, Tharek (Peer reviewed; Journal article, 2020)This letter presents the rainfall intensity and rain attenuation analysis in tropical region based on a one-year measurement using the 73.5 GHz E-band link of 1.8 km with three rain gauges installed along the path. The ... -
Statistical Analysis of Rain at Millimeter Waves in Tropical Area
Al-Samman, Ahmed; Cheffena, Michael; Mohamed, Marshed Kassim; Azmi, Marwan Hadri; Ai, Yun (Journal article; Peer reviewed, 2020)The high frequencies of millimeter wave (mm-wave) bands have been recognized for the fifth generation (5G) and beyond wireless communication networks. However, the radio propagation channel at high frequencies can be largely ...