Haleema Sadia | National University of Sciences & Technology (NUST) (original) (raw)
Haleema Sadia graduated from UET Taxila, Pakistan in year 2015. Afterthat work as a Research Assistant at HITEC university Taxila, Pakistan.Currently doing MS Electrical Communication Engineering at CEME NUST,Pakistan. She did accomplished projects during all semesters. Keenly interestedin Wireless Communication field. First publication in IEEE “Chipless RFIDTag with IoT applications” in year 2016. Currently doing research in Radar andNOMA technology. She is interested to do more work in Non-OrthogonalMultiple Access domain. She was also part of ACTSENA research scholarsgroup at UET Taxila.
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Papers by Haleema Sadia
2016 IEEE 59th International Midwest Symposium on Circuits and Systems (MWSCAS), 2016
Radio Frequency Identification is a rapidly growing technology. Recent advances in wireless techn... more Radio Frequency Identification is a rapidly growing technology. Recent advances in wireless technology pave a path for integrating sensors with RFID system. The proposed tag consists of multiple resonators which are used for encoding the data. The tag can also be used for sensing applications by integrating dedicated resonator with the sensor element. Each spiral resonator is of a different length to encode data at different frequencies. Also, the length of spiral resonator and separation between them is adjusted so that there will be no coupling between them. The data encoding capacity is increased by increasing number of spiral resonators (of different length). The 12-bit encoded data is obtained among which 11-bits are used to encode the chipless RFID tag ID for tracking/identification, and the remaining one bit is used for sensing. The dimensions used in this design are 16.30 cm × 6.63 cm and analysis is carried out for both Taconic TLX™ and Rogers 4003CTM substrates. For 12-bit multi-resonator design using Rogers 4003CTM substrate, the overall bandwidth utilization is 1.7 GHz (1.2 GHz–2.9GHz). The tag can be used in various low-cost sensing applications. The encoding capacity can be further increased by adding more spectral resonators.
Physical Communication, Jun 1, 2023
RADAR technology is getting significance place in estimation and detection of short and long rang... more RADAR technology is getting significance place in estimation and detection of short and long range targets. One of the important estimation parameter is radar delay time. In this paper, Maximum Likelihood Estimator (MLE) for range estimation using static radar is derived. Range of radar is estimated by estimating the round trip delay time. Delay is observed from the active transmitted pulse of radar. In addition, the Cramer Rao Lower Bound (CRLB) for range is also calculated. Simulation of MLE is performed. Monte Carlo simulations are also done to show that MLE achieves the CRLB at high signal to noise ratio.
2018 ELEKTRO
The increasing demands of high throughput and capacity in 5G are posing different challenges on t... more The increasing demands of high throughput and capacity in 5G are posing different challenges on the design of multiple access schemes. To meet these challenges, Non-orthogonal multiple access (NOMA) is considered as one of the potential candidates. Broadly, NOMA is classified as power-domain and code-domain NOMA. Power-domain NOMA serves multiple users with the same time, frequency and code, but using different power levels. This feature make NOMA capable of increasing spectral efficiency gain over the conventional multiple access schemes. In this paper, an in-depth analysis of downlink power domain NOMA is provided under various fading channels, modulation schemes and channel coding rates. Power domain multiplexing with superposition coding is done at the transmitter side and practical successive interference cancellation (SIC) is used at the receiver side. Performance is analyzed by simulations on the basis of Bit error rate (BER) using AWGN, Rician and Rayleigh channel models for various modulation schemes and code rates. This analysis provides a good foundation for the development of Adaptive Modulation & Coding (AMC) schemes for future NOMA-based 5G systems.
2016 IEEE 59th International Midwest Symposium on Circuits and Systems (MWSCAS), 2016
Radio Frequency Identification is a rapidly growing technology. Recent advances in wireless techn... more Radio Frequency Identification is a rapidly growing technology. Recent advances in wireless technology pave a path for integrating sensors with RFID system. The proposed tag consists of multiple resonators which are used for encoding the data. The tag can also be used for sensing applications by integrating dedicated resonator with the sensor element. Each spiral resonator is of a different length to encode data at different frequencies. Also, the length of spiral resonator and separation between them is adjusted so that there will be no coupling between them. The data encoding capacity is increased by increasing number of spiral resonators (of different length). The 12-bit encoded data is obtained among which 11-bits are used to encode the chipless RFID tag ID for tracking/identification, and the remaining one bit is used for sensing. The dimensions used in this design are 16.30 cm × 6.63 cm and analysis is carried out for both Taconic TLX™ and Rogers 4003CTM substrates. For 12-bit multi-resonator design using Rogers 4003CTM substrate, the overall bandwidth utilization is 1.7 GHz (1.2 GHz–2.9GHz). The tag can be used in various low-cost sensing applications. The encoding capacity can be further increased by adding more spectral resonators.
Physical Communication, Jun 1, 2023
RADAR technology is getting significance place in estimation and detection of short and long rang... more RADAR technology is getting significance place in estimation and detection of short and long range targets. One of the important estimation parameter is radar delay time. In this paper, Maximum Likelihood Estimator (MLE) for range estimation using static radar is derived. Range of radar is estimated by estimating the round trip delay time. Delay is observed from the active transmitted pulse of radar. In addition, the Cramer Rao Lower Bound (CRLB) for range is also calculated. Simulation of MLE is performed. Monte Carlo simulations are also done to show that MLE achieves the CRLB at high signal to noise ratio.
2018 ELEKTRO
The increasing demands of high throughput and capacity in 5G are posing different challenges on t... more The increasing demands of high throughput and capacity in 5G are posing different challenges on the design of multiple access schemes. To meet these challenges, Non-orthogonal multiple access (NOMA) is considered as one of the potential candidates. Broadly, NOMA is classified as power-domain and code-domain NOMA. Power-domain NOMA serves multiple users with the same time, frequency and code, but using different power levels. This feature make NOMA capable of increasing spectral efficiency gain over the conventional multiple access schemes. In this paper, an in-depth analysis of downlink power domain NOMA is provided under various fading channels, modulation schemes and channel coding rates. Power domain multiplexing with superposition coding is done at the transmitter side and practical successive interference cancellation (SIC) is used at the receiver side. Performance is analyzed by simulations on the basis of Bit error rate (BER) using AWGN, Rician and Rayleigh channel models for various modulation schemes and code rates. This analysis provides a good foundation for the development of Adaptive Modulation & Coding (AMC) schemes for future NOMA-based 5G systems.