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) ... -
Effect of Weather Condition on LoRa IoT Communication Technology in a Tropical Region: Malaysia
Al-Samman, Ahmed; Cheffena, Michael; Elijah, Olakunle; Rahim, Sharul Kamal Abdul; Sittakul, Vitawat; Din, Jafri Bin; Tharek, Abdul R. (Peer reviewed; Journal article, 2021)An experimental study on the effect of weather conditions such as solar radiation, humidity, temperature, and rain on the Long Range (LoRa) communication in a tropical region (Malaysia) via a campus environment has been ... -
In-Body Sensor Communication: Trends and Challenges
Mohamed, Marshed Kassim; Maiseli, Baraka; Ai, Yun; Mkocha, Khadija; Al-Samman, Ahmed (Peer reviewed; Journal article, 2021)Wireless body area networks (WBANs) consist of interconnected devices that monitor the human body functions and the surrounding environment. Of these sensors, implants encounter multiple challenges due to their invasive ... -
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 ... -
Modes power equalization based-singular value decomposition in mode division multiplexing systems for multi-hungry bandwidth applications
Al-Samman, Ahmed (Peer reviewed; Journal article, 2020)Optical fiber tendencies are pushing for changes towards upgrading scalability, agility, and unwavering quality for multi-hungry bandwidth applications. In the quest for future proof of those multi-hungry bandwidth ... -
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 ... -
Survey of Millimeter-Wave Propagation Measurements and Models in Indoor Environments
Al-Samman, Ahmed; Cheffena, Michael (Peer reviewed; Journal article, 2021)The millimeter-wave (mmWave) is expected to deliver a huge bandwidth to address the future demands for higher data rate transmissions. However, one of the major challenges in the mmWave band is the increase in signal loss ...