Publication
JOURNAL
2021
1. Omar Hayat, Zeeshan Kaleem, Muhammad Zafarullah, Razali Ngah, Siti Zaiton Mohd Hashim, Signaling Overhead Redustion Techniques in Device-to-Device Communications: Paradigm for 5G and Beyond, IEEE Access, Jan 2021, Vol. 9. pp. 11037–11050 Q1 (IF: 4.098)
2. Hayat, O., Ngah, R., Mohd Hashim, S.Z. “Sector Scanning Algorithm (SSA) for device discovery in D2D communication, International Journal of Electronics, 2021, 108(1), pp. 45–66 Q4
3. Hayat, O., Ngah, R., Hashim, S.Z.M, Multi-user Shared Access (MUSA) procedure for device discovery in D2D communication, Telecommunication Systems, Vol. 76, No. 2, pp.291-297, 2021 (Q3)
2020
1. Omar Hayat, Razali Ngah, Zeeshan Kaleem, Siti Zaiton Mohd Hashim, and Joel J. P. C. Rodrigues, A Survey on Security and Privacy Challenges in Device Discovery for Next-Generation Systems, IEEE Access, April 2020, 8(1). Q1 (IF: 4.098)
2. Hayat, O., Ngah, R., and S. Z. Mohd Hashim, “Performance Analysis of Device Discovery Algorithms for D2D Communication,” Arabian Journal for Science and Engineering, 2020, 45:1457–1471 Q3 (IF:1.518)
3. Hayat, O., Ngah, R., Mohd Hashim, S.Z., Full Duplex DD for In-Band D2D Communication, Wireless Personal Communications, 2020, 115(1), pp. 679-694. (Q4)
4. Omar Hayat, Razali Ngah, Siti Zaiton Mohd Hashim, Bat echolocation-based algorithm for device discovery in D2D communication, SN Applied Sciences, Volume 2, Issue 8, Pages 1-13, 2020
5. Ibrahim, N.A., Rahman, T.A., Ngah, R., Aziz, O.A., Elijah, O., Power density of rectangular microstrip patch antenna arrays for 5G indoor base station, Indonesian Journal of Electrical Engineering and Computer Science, 19(3), pp. 1368-1375, 2020.
2019
1. Bushra Naeema, Razali Ngah, and Siti Z. Mohd Hashim, Reduction of Ping-pong effect in Heterogeneous Networks Using Fuzzy Logic, Journal of Soft Computing (Springer), 2019, Q2 (IF: 2.472)
2. Hayat, O., Ngah, R., Zahedi, Y., In-Band Device to Device (D2D) Communication and Device Discovery: A Survey, Wireless Personal Communications, vol. 106, no. 2, pp. 451-472, May 2019. Q4 (IF: 0.929)
3. Hayat, O., Ngah, R., and Zahedi, Y., Device Discovery Signal Design for Proximal Devices in D2D Communication,” Wireless Personal Communications, vol. 106, no. 2, pp. 451-472, May 2019. Q4 (IF: 0.929)
4. Omar Hayat, Razali Ngah, Siti Zaiton Mohd Hashim, Muhammad Hashim Dahri, Reza Firsandaya Malik, and Yusnita Rahayu, Device Discovery in D2D Communication: A Survey, IEEE Access, September 12, 2019,Q1 (IF: 4.098)
5. A. Moradi, R. Ngah, and M. Khalily, Polarized diversity compact planar MIMO antenna for wireless access point applications, Progress In Electromagnetics Research C, Vol. 91, 2019, pp. 115–127.
6. Moubachir Madani Fadoul, Razali Ngah, and Alireza Moradi, Characterizing The SINR in Poisson Network Using Factorial Moment, International Journal of Electronics and Telecommunications, 2019, Vol. 65, No. 4, pp. 611–617.
2018
1. O. Hayat, R. Ngah and Yasser Zahedi, Device discovery for D2D communication in in-band cellular networks using sphere decoder like (SDL) algorithm, EURASIP Journal on Wireless Communications and Networking (2018) 2018:74, Q2 (IF: 1.951)
2. Orakwue, S.I., Ngah, R., Elija, O. & Babale, S.A. 2018. Bandwidth enhancement of circular polarized microstrip antenna at 2.4 GHz for WLAN applications. Advanced Science Letters 24(6): 3933-3936.
3. Orakwue, S.I., Ngah, R., Elija, O. & Babale, S.A. 2018. Cascaded Butler matrix with two-dimensional beam scanning capability at 28 GHz for 5G wireless system. Advanced Science Letters 24(6): 3937-3939.
4. Hayat, O., Ngah, R. & Hashim, S.Z.M. 2018. Swarm optimization based radio resource allocation for dense devices D2D communication. International Journal of Advanced Computer Science and Applications 9(6): pp 252-256, 2018.
5. Zulkifli Ambak, Hizamel M.Hizan, Ahmad Ismat Abdul Rahim, Azmi Ibrahim, Mohd Zulfadli M. Yusoff, and Razali Ngah, Multilayer End Coupled Band Pass Filter using Low-Temperature Co-Fired Ceramic Technology for Broadband Fixed Wireless, Indonesian Journal of Electrical Engineering and Computer Science, Vol. 10, No. 3, June 2018.
6. O. Hayat, R. Ngah and Yasser Zahedi, Cooperative GPS and Neighbors Awareness Based Device Discovery for D2D Communication in in-Band Cellular Networks, International Journal of Engineering & Technology, 7 (2.29) (2018) 700-703.
2017
Indexed Journal Article
1. Muhamad, W.A.W.,Ngah, R., Jamlos, M.F., Soh, P.J., Ali, M.T., “High-Gain Dipole Antenna Using Polydimethylsiloxane–Glass Microsphere (PDMS-GM) Substrate for 5G Applications”, Applied Physics A: Materials Science and Processing, Vol.123 (1), article no: 102 ,2017 . Q3 (IF :1.444) (Scopus & WoS)
2. Muhamad, W.A.W., Ngah, R., Jamlos, M.F., Soh, P.J., Ali, M.T., Narbudowicz, A., “Bandwidth Enhancement Of A Multilayered Polymeric Comb Array Antenna For Millimeter-Wave Applications”, Applied Physics A: Materials Science and Processing Vol.123 (1), article no: 105 ,2017 . Q3 (IF :1.444) (Scopus & WoS)
3. Muhamad, W.A.W., Ngah, R., Jamlos, M.F., Soh, P.J., Ali, M.T., “Bandwidth enhancement using Polymeric Grid Array Antenna for millimeter-wave application”, Applied Physics A: Materials Science and Processing, Vol.123 (1), article no: 69 ,2017 . Q3 (IF :1.444) (Scopus & WoS)
Conference Paper
1. Razali Ngah, Yasser Zahedi, " UWB Communications: Present and Future ", 2016 IEEE Asia-Pacific Conference on Applied Electromagnetics (APACE) 11 - 13 December 2016, Langkawi, Kedah, Malaysia,pp 373 - 378,2017.
2016
Indexed Journal Article
1. Zahedi, Y , Ngah, R., Nunoo, S., Mokayef, M., Alavi, S.E., Amiri, I.S., “Experimental measurement and statistical analysis of the RMS delay spread in time-varying ultra-wideband communication channel” , Measurement: Journal of the International Measurement Confederation, Vol.89, pp 179-188.2016 IF : 1.742 (Q2) (Scopus & WoS)
2. W.A.W.Muhamad, R.Ngah, M.F.Jamlos,P.J.Soh, H.Logo, “ Antenna Array Bandwidth Enhancement Using Polymeric Nanocomposite Substrate”, Applied Physic A (Material Science & Processing) ,2016, 122, pp 426- 435, 2016 (IF: 1.444) (Q3) (Scopus & WoS)
3. Yasser Zahedi, Razali Ngah, Mastaneh Mokayef, Khalid Zahedi, “Stationarity Regions for Ultrawideband Channels”, IEEE Antennas And Wireless Propagation Letters, Vol. 15, pp 139- 142, 2016 (IF: 1.751) (Q2) (Scopus & WoS)
4. Al-Samman, A.M. Rahman, T.A.,Ngah, R., “UWB channel characterization in 28 ghz millimeter waveband for 5G cellular networks, Jurnal Teknologi, 78 ( 6-11), pp 19-23, 2016.
5.Nunoo, S., Chude-Okonkwo, U.A.K., Ngah, R., Chude-Olisah, C., Zahedi, Y.K., "Channel measurement and time dispersion analysis for outdoor mobile ultrawideband environment", Turkish Journal of Electrical Engineering and Computer Sciences, 24 (6), , pp. 4555-4568, 2016.
Conference Paper
1. Muhamad, W.A.W., Ngah, R., Jamlos, M.F. P.J.Soh, H.Logo “Gain Enhancement of Microstrip Grid Array Antenna for 5G Applications” URSI Asia Pacific Radio Science Conference (URSI AP-RASC) 2016. Seoul, South Korea, 21-25 August 2016 ,pp 1827- 1829, 2016. (Scopus & WoS)
2. Orakwue Stella Ifeoma , Razali Ngah, T. A. Rahman “A Two Dimensional Beam Scanning Array Antenna for 5G Wireless Communication”,IEEE Wireless Communications and Networking Conference Workshops, WCNCW 2016, Doha Qatar, 3-6 April 2016, pp 433-436,2016. (Scopus)
3. Bushra Naeem, Razali Ngah, Siti Z.Mohd Hashim, “Handovers in small cell based heterogeneous networks”, 2016 International Conference on Computing, Electronic and Electrical Engineering, (ICE Cube 2016) , 11 -12 April 2016, pp 268 – 271,2016. (Scopus & WoS)
4. Muhamad, W.A.W., Ngah, R., Jamlos, M.F., Jamlos, M.A. et.al, “Antenna Array Bandwidth Enchancement using Polymeric Nanocomposite Substrate”, 6th International Conference on Metamaterials, Photonic Crystals and Plasmonics (META15), New York, 4 - 7 August 2015. (Accepted).
5. Stella. I. Orakwue, R. Ngah and N. Seman “Performance of Array Antenna with Butler Matrix at 2.6GHz 4G and 28GHz 5G Applications”, 6th International Graduate Conference on Engineering Science & Humanity 2016 (IGCESH 2016). Skudai, Johor, 15-17 August 2016. (Accepted).
6. Orakwue Stella Ifeoma , Razali Ngah “A 2-D Scanning Multi-Beam Array Antenna for 5G Wireless Communications Applications”, International Conference on Science, Engineering, and the Social Sciencesternational Conference (ICSESS 2016) , Skudai, Johor, 30May - 1 June 2016 (Accepted).
7. Orakwue Stella Ifeoma , Razali Ngah “Circular Polarized Microstrip Antenna for Bandwidth Improvement At 2.4 Ghz For Wlan Applications”, International Conference on Science, Engineering, and the Social Sciencesternational Conference (ICSESS 2016), Skudai, Johor. 30May - 1 June 2016 (Accepted).
8. Nunoo, S. , Ngah, R., Chude-Okonkwo, U.A.K., Elijah, O., Orikumhi, I., Leow, C.Y. "On the sparsity-aware partial-update NLMS algorithms for UWB channel estimatio", 2015 International Conference on Signal and Image Processing Applications, ICSIPA 2015, ,Kuala Lumpur, 19-21 October 2015. pp. 326-331,2016
2015
Indexed Journal Article
1. Orakwue, S.I., Ngah, R., Siti Z.Mohd Hashim, Hamza M.R. Al-Khafaji, " Implementation of Switched Beam Smart Antenna Using Artificial Neural Network, Wireless Communications, 83 (1),pp 87-98, 2015. . IF = 0.653 (Q4). (IWoS & Scopus)
2. Al-Samman,A.M., Nunoo,S., Rahman,T.A., Chude-Okonkwo,U.A.K., Ngah,R., "Hybrid Channel Estimation Technique with Reduced Complexity for LTE Downlink, Wireless Personal Communications, 82(2), pp 1147-1159, 2015. IF= 0.653 (Q4) (WoS & Scopus)
3. Al-Samman,A.M., Rahman,T.A., Nunoo,S., , Chude-Okonkwo,U.A.K., Ngah,R., Shahddad, R.Q., Zahedi,Y.,Experimental Characterization and Analysis for Ultra Wideband Outdoor Channel ", Wireless Personal Communications, 83(4),pp 3103-3118, 2015 (IF= 0.653) (WoS & Scopus)
4. Hamza M.R. Al-Khafaji, Razali Ngah, S.A. Aljunid and T.A. Rahman, “A new two-code keying scheme for SAC-OCDMA systems enabling bipolar encoding”, Journal of Modern Optics, 2015, Vol. 62, No. 5, 327–335, 2015.(IF: 1.166) (Q3) (WoS & Scopus)
5. Ibrahim, N.A., Ngah,R.,Al-Khafaji,H.M.R., " ICI Alleviation in OFDM System Utilizing Scale Alpha Pulse Shaping", Research Journal of Applied Sciences, Engineering and Technology, 10(1), pp 45-48,2015 (Scopus).
6. Orakwue, S.I., Ngah, R., Rahman, T.A., Al-Khafaji, H.M.R., “ A 4 × 4 butler matrix for 28 GHz switched multi-beam antenna”, International Journal of Engineering and Technology, 7(2),pp 436-442, 2015. (Scopus).
7. Nor Adibah Ibrahim, Razali Ngah, Hamza M. R. Al-Khafaji, “Inter-carrier Interference Mitigation in OFDM System Using a New Pulse Shaping Approach”,International Journal of Engineering and Technology (IJET), 6(6), p.p 2738 – 2746, 2015. (Scopus)
Conference Paper
1. Nor Adibah Ibrahim, Razali Ngah, and Hamza M. R. Al-Khafaji, “Proposal of New Pulse Shaping Method for Side Lobes Reduction in OFDM System”, International Conference on Science, Engineering and the Social Sciences (ICSESS 2015), Johor, 11-13 May 2015. (Accepted)
2. Stella Ifeoma Orakwue, Razali Ngah, T. A. Rahman, and Hamza M. R. Al-Khafaji “A Steerable 28 GHz Array Antenna Using Branch Line Coupler”, 2015 International Conference on Telematic and Future Generation Networks (TAFGEN 2015), Kuala Lumpur, 26-28 May 2015. (Accepted)
3. Hamza M. R. Al-Khafaji, Razali Ngah, S. A. Aljunid, and T. A. Rahman, “A new approach for enabling bipolar encoding in high-rate SAC-OCDMA systems,” 2015 International Conference on Communications, Signal Processing, and their Applications (ICCSPA15), Sharjah, United Arab Emirates (UAE), 17 − 19
2014
Indexed Journal Article
1.Mokayef, Mastaneh; Rahman, Tharek. A.; Ngah, Razali; Ahmed, Marwah Y., Spectrum Sharing Between High Altitude Platform System (HAPS) and an Incumbent LTE System, Advanced Science Letters), Advanced Science Letters, American Scientific Publishers, Vol. 20 2014, pp. 451-454(4) (Scopus).
2.Mastaneh mokayef, Tharek Abd. Rahman, Razali Ngah, “Early Stage of Spectrum Planning for Operation of HAPS at 5.8GHz Band”, Life Science Journal, Special Issue 2014.
3.Nael Ahmed Al-Shareefi, S.I.S Hassan, Fareq Malek, Razali Ngah, Sura Adil Abbas, Optical Generation of 60 GHz Downstream Data in Radio over Fiber Systems Based on Two Parallel Dual-Drive MZMs, International Journal of Engineering and Technology, Vol. 6, No.2, 2014, pp 579-587. (Scopus)
4.Bushra Naeem, Razali Ngah, Siti Zaiton Mohd Hashim , Wajahat Maqbool, Muhaddisa Barat Ali,“A Neural Network Based Approach for Call Admission Control in Heterogeneous Networks”. Life Science Journal 2014.(Scopus)
5.Yasser Zahedi, Razali Ngah, Mastaneh Mokayef “MIMO Correlation-Based Analytical Channel Modeling”, Life Science Journal, Special Issue 2014.
6.Bushra Naeema, Uche A. K. Chude-Okonkwo, Razali Ngah, Siti Z. Mohd Hashim, Wajahat Maqbool, Sadiqa Hashim, “ Exploring the Open Problems and Future Trends Concerning Handovers in Heterogeneous Wireless Networks: A Review” , Jurnal Teknologi. Issue 3, pp 13-17, 2014. (Scopus)
7.Solomon Nunoo, Uche A. K. Chude-Okonkwo, and Razali Ngah, “Variable Step-Size l0-Norm NLMS Algorithm for Sparse Channel Estimation”, Scientific World Journal. (Scopus) (accepted)
8.Solomon Nunoo, Uche A. K. Chude-Okonkwo, Razali Ngah “Sparsity-Constraint LMS Algorithms for Time-Varying UWB Channel Estimation” Research Journal of Applied Sciences, Engineering and Technology. (Scopus) (accepted)
9.Orakwue Stella Ifeoma, Razali Ngah and T. A. Rahman, “Analysis of Wideband Antenna for Indoor LTE Base Station Application” International Journal of Applied Engineering Research (IJAER). (Scopus) (accepted)
10.Hamza M.R. Al-Khafaji, Razali Ngah, S.A. Aljunidb and T.A. Rahman, “A new two-code keying scheme for SAC-OCDMA systems enabling bipolar encoding”, Journal of Modern Optics, 2014, Vol 72, p.p 1-9,2014. (IF – 1.166) Q3
Conference Paper
1. Ahmed M. Al-Samman,Uche A. K. Chude-Okonkwo, R. Ngah and Solomon Nunoo,” Experimental Characterization of an UWB Channel in outdoor Environment ” IEEE 10th International Colloquium on Signal Processing and Its Applications (CSPA 2014), Kuala Lumpur, 7-9 March 2014, p.p 91 – 94, 2014
2. Uche A. K. Chude-Okonkwo, Solomon Nunoo, and Razali Ngah, “Diffusion-Based Molecular Communication Concentration and Capacity Dependencies on Human Body Temperature Variation”, IEEE 10th International Colloquium on Signal Processing and Its Applications (CSPA 2014), Kuala Lumpur, 7-9 March 2014,p.p 53 – 57, 2014.
3. Solomon Nunoo, Uche A. K. Chude-Okonkwo, Razali Ngah, and Ahmed Al-Samman, “UWB Channel Measurement and Data Transfer Analysis for Multiuser Infostation Applications” IEEE 10th International Colloquium on Signal Processing and Its Applications (CSPA 2014), Kuala Lumpur, 7-9 March 2014,p.p 139 – 144, 2014
4.Yasser Zahedi, Razali Ngah, Uche A.K. Chude-Okonkwo, Solomon Nunoo, Mastaneh Mokayef, “ Modeling the RMS Delay Spread in Time-Varying UWB Communication Channels”,International Conference on Intelligent and Advanced Systems (ICIAS2014), Kuala Lumpur ,3-5 June 2014, p.p 1 – 5, 2014
5. Yasser Zahedi, Razali Ngah, Uche A.K. Chude-Okonkwo, Solomon Nunoo, Mastaneh Mokayef “UWB Channel Measurement and Development of Scatterer Identification Algorithm” The 2nd International Conference on Electronic Design (ICED 2014), Penang, 19-21 August 2014, p.p 139 – 144, 2014.
6. Solomon Nunoo, Uche A. K. Chude-Okonkwo, and Razali Ngah , “Variable Step- Size l0 – Norm NLMS Algorithm for Sparse Channel Estimation”, Asia Pacific Conference on Wireless and Mobile (APWiMOB 2014), Bali, Indonesia, 28-30 August 2014.,p.p 88 – 91, 2014
7. Yasser Zahedi, Razali Ngah, Uche A. K. Okonkwo, Solomon Nunoo and Mastaneh Mokayef ,“Measurement and Analysis of an Outdoor MIMO-UWB Communication Channel” Asia Pacific Conference on Wireless and Mobile (APWiMOB 2014), Bali, Indonesia, 28-30 August 2014, p.p 168 – 171, 2014
8. Stella I. Orakwue, Razali Ngah, T. A. Rahman, Siti Zaiton Mohd Hashim “Neural Network Based Switch Beam Smart Antenna”, Asia Pacific Conference on Wireless and Mobile (APWiMOB 2014), Bali, Indonesia, 28-30 August 2014,p.p 292 – 296.
9. Zulkifli Ambak, Azmi Ibrahim,Hizamel Mohd Hizan, Ahmad Ismat Abdul Rahim ,Mohd Zulfadli, Mohamed Yusoff , Razali Ngah, Young Chul Lee, " Design of 40GHz multilayer end coupled band pass filter using LTCC technology ", 11th IEEE International Conference on Semiconductor Electronics, (ICSE 2014) Berjaya Times Square Hotel Kuala Lumpur, 27 August - 29 August 2014,p.p 294-297, 2014.
10. Hamza M. R. Al-Khafaji, Razali Ngah, S. A. Aljunid , and T. A. Rahman, "A Novel Encoding and Decoding Structure for SACOCDMA Systems Enabling High-Rate Transmission", Asia Pacific Conference on Electromagnetics (APACE), 8 - 10 December 2014,Johor Bahru, p.p 211-213, 2014
2013
Indexed Journal Article
1. Al-Shareefi, N.A., Hassan, S.I.S., Malek, F., Ngah, R., Abbas, S.A., Aljunid, S.A. “A cost-effective method for high-quality 60GHZ optical millimeter wave signal generation based on frequency quadrupling”, Progress in Electromagnetics Research 137 , pp. 255-274, 2013 IF: 5.298
2.Al-Shareefi, N.A., Hassan, S.I.S., Malek, F., Ngah, R., Aljunid, S.A., Fayadh, R.A.,Aldhaibani, J.A., Rahim, H.A. “ Development of a new approach for high-quality quadrupling frequency optical millimeter-wave signal generation without optical filter”, Progress in Electromagnetics Research134 , pp. 189-208 ,2013
IF: 5.298
Conference Paper
1. A.S.M. Jaya, R. Ngah, H. Haron, S.Z.M. Hashim, M.R. Muhamad, and M.N.A. Rahman, “Modeling of ANFIS in predicting TiN coatings roughness”, 5th The International Conference on Computer Science and Information Technology (CSIT 2013), Amman, Jordan, 27-28 March, pp. 13-18, 2013.
2. Aina Musdholifah, Siti Zaiton Mohd. Hashim, and Razali Ngah, “Robust Local Triangular Kernel Density-based Clustering for High-dimensional Data”, 5th The International Conference on Computer Science and Information Technology (CSIT 2013), Amman, Jordan, 27-28 March, pp. 24-32, 2013.
3. Teguh Prakoso, Razali Ngah, Tharek Abdul Rahman, and Zabih Ghassemlooy, “Isolation Enhancement and Size Reduction of Printed-Antenna Pairs for Broadband Microwave-Photonic Access-Point”, 20th International Conference on Telecommunications (ICT2013), Casablanca, Morocco, 6-8 May Article number 6632109, 2013.
4. Al-Samman, A.M. ; Rahman, T.A. ; Chude-Okonkwo, U.A.K. ; Ngah, R., “Hybrid channel estimation for LTE downlink” , 2013 IEEE 9th International Colloquium on Signal Processing and its Applications (CSPA),8-10 March 2013, pp. 44-48, 2013
5. Nael Ahmed Mohammed, S.I.S Hassan, Fareq Malek, Razali Ngah, Sura Adil Abbas, “Optical Generation of 60-GHz Signal for Millimeter wave Wireless Communication”, 2013 IEEE International RF and Microwave (RFM) Conference, Penang, 9-11 December 2013, pp .437-440, 2013.
6. Uche Kennedy Okonkwo, Razali Ngah, Solomon Nunoo, “Time-varying UWB channel model for mobile robot-to-robot communication systems”, 2013 11th IEEE Malaysia International Conference on Communications, Kuala Lumpur, 26-28 November 2013, pp. 1-6, 2013.
7. Nael Ahmed Al-Shareefi, S.I.S Hassan, Fareq Malek, Razali Ngah, Syed Alwee Aljunid, Sura Adil Abbas, Noor Anida, “A study in OCS millimeter-wave generation using two parallel DD-MZMs”, 2013 11th IEEE Malaysia International Conference on Communications, Kuala Lumpur, 26-28 November,pp 418-421, 2013.
8. Uche A.K. Chude-Okonkwo, Solomon Nunoo, Razali Ngah, Chollete Olisah Chude, Tharek Abd Rahman, and Anthony A. Okafor, “Characterization and Parameterization of a Class of Multivariable Non-Summable Stochastic Processes with Bounded Stochastic Trends”, 2013 IEEE International Conference on Signal and Image Processing Applications,Melaka, 8-10 October 2013, pp 322-326, 2013.
9. Solomon Nunoo, Uche A. K. Chude-Okonkwo, Razali Ngah, “Performance of LMS, NLMS and LMF Algorithms in Tracking Time-Varying UWB Channels”, 2013 IEEE International Conference on SIgnal and Image Processing Applications,Melaka, 8-10 October 2013, pp 312-316, 2013.
10. Solomon Nunoo, Uche Kennedy Okonkwo, Razali Ngah, “Path loss and time dispersion analysis for outdoor roadway UWB propagation channel”, 2013 11th IEEE Malaysia International Conference on Communications, Kuala Lumpur, 26-28 November 2013,pp.87-291, 2013.
11. Uche A.K. Chude-Okonkwo, Razali Ngah, Solomon Nunoo, Ahmed M. Al-Samman, and Tharek A. Rahman , “Adaptive Transmission Technique for Short Range Mobile UWB and UWA OFDM Communication”, IEEE (GLOBECOM) 2013 Global Communications Conference Exhibition and Industry Forum ,9-13 December 2013, Atlanta GA,USA, pp,2013.
12. Uche A.K. Chude-Okonkwo, Razali Ngah, Yasser Zahedi, Solomon Nunoo, Ahmed Al-Saman and Tharek Abd Rahman “Measurement and Time Dispersion Analysis of UWB Channels for Infostation Application in an Outdoor Recreation Park” , 7th International Conference on Signal Processing and Communication Systems, ICSPCS’2013, 16-18 December 2013, Gold Coast, Australia, pp,2013.
2012
Indexed Journal Article
1. Uche Chude A.K Okonkwo, Razali Ngah, Chee Y. Leow and Tharek Abdul Rahman " Time Scale Domain Characterization of Time Varying Ultrawideband Infostation Channel,", Radioengineering Journal , IF: 0.503
2. Ng, W. P., Abd El Aziz, A., Ghassemlooy, Z., Aly, M., and Ngah, R., ‘Optimised Non-uniform Biasing Technique for High Speed Optical Router to Achieve Uniform SOA Gain’, IET Communications Journal, 6(8), pp 484-491, 2012 (IF: 0.829).
Conference Paper
1. Nor Aswani Mamat, Uche A.K Chude Okonkwo, Razali Ngah and Yasser K. Zahedi, “Development of Generic Wireless Channel Simulator for Diverse Environment”,2012 IEEE Asia-Pacific Conference on Applied Electromagnetics (APACE 2012) ,Melaka, 11-13 December 2012,pp 56-61, 2012.
2. Nur Shazwani Mohd Noor, Norliziani Zamuri, Razali Ngah and Teguh Prakoso, “Multiple Input Multiple Output Orthogonal Frequency Division Multiplexing Based Photonic Access Point”, 2012 IEEE Asia-Pacific Conference on Applied Electromagnetics (APACE 2012) ,Melaka,11-13 December 2012, pp 79-83, 2012.
3. U A.K.C Okonkwo, R. Ngah and Tharek A. Rahman, “Evolutionary Second-Order Statistical Model for Nonstationarity Wideband Communication Channels”, 1st International Symposium on Telecommunication Technologies (ISTT2012), Kuala Lumpur, 26-28 November 2012, pp 147-150, 2012.
4. Musdholifah, A., Hashim, S.Z.M , Ngah, R., “Hybrid PCA-ILGC clustering approach for high dimensional data” , 2012 IEEE International Conference on Systems, Man, and Cybernetics, SMC 2012; Seoul; South Korea; 14- 17 October 2012, pp 420-424, 2012.
5. N.S.M.Noor, R.Ngah, T.Prakoso and S.N.A.Sukito, “Fiber Drop Point Design for Optical –Wireless Access”, 3rd International Conference on Photonics (ICP 2012), Penang, 1-3 October, pp 365-369, 2012.
6. N.S.M.Noor, R.Ngah, T.Prakoso and S.M.Lim, “MIMO-OFDM Optical Backhaul Backup System Using WLAN 802.11n”, 3rd International Conference on Photonics (ICP 2012), Penang, 1-3 October 2012,pp 125-129, 2012.
7. Y. K. Zahedi, Okonkwo, U. A. K., R. Ngah, T.A. Rahman and N.A. Mamat, “Time-Scale Domain Characterization of Ultra- wideband MIMO Channel and Range Extension for Infostation Environment”, IEEE Symposium on Wireless Technology and Applications (ISWTA 2012), Bandung, Indonesia, 23-26 September 2012, pp 2012, pp 151-155, 2012.
8. Okonkwo, U. A. K., Ngah, R., Y. K. Zahedi, S. M. Zaid and Rahman, “Measurement and Parameter Description of Time-varying Ultra-wideband Infostation Channel”, Progress in Electromagnetics Research (PIERS 2012) Conference, Kuala Lumpur 27-30 March, pp 1476-1479, 2012.
2011
Indexed Journal Article
1. T. Prakoso, R. Ngah, Z. Ghassemlooy, and T. A. Rahman, “Antenna representation in two-port network scattering parameter,” Microwave and Optical Technology Letters, vol. 53, no. 6, pp. 1404-1409, 2011. IF : 0.682
2. Uche Chude A.K Okonkwo, Razali Ngah and Tharek Abdul Rahman , " Time Scale Domain Characterization of Non- WSSUS Wideband Channels", EURASIP Journal on Advances in Signal Processing, 2011 IF : 1.053
Data from Scopus for Indexed Journal