The Experts below are selected from a list of 12 Experts worldwide ranked by ideXlab platform
Jean Armstrong - One of the best experts on this subject based on the ideXlab platform.
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Implementation of PCC-OFDM on a software-defined radio testbed
Australian Journal of Telecommunications and the Digital Economy, 2017Co-Authors: Gayathri Kongara, Jean ArmstrongAbstract:A software-defined radio implementation of polynomial cancellation coded orthogonal frequency division multiplexing (PCC-OFDM) on a field programmable gate array (FPGA) based hardware platform is presented in this paper. Previous publications on PCC-OFDM have demonstrated that, in comparison to Normal Cyclic Prefix based OFDM, it is robust in the presence of many impairments including carrier frequency offset, multipath distortion and phase noise. The error performance of the two multicarrier techniques is compared on a practical wireless channel under common channel impairments such as carrier frequency offset, multipath and noise. Based on the comparative results obtained on the hardware platform, the properties of PCC-OFDM make it a suitable candidate for consideration in future 5G applications requiring robust performance in asynchronous environments with minimal out of band spectral emissions.
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PCC-OFDM on a software-defined radio testbed
Australian Journal of Telecommunications and the Digital Economy, 2017Co-Authors: Gayathri Kongara, Jean ArmstrongAbstract:A software-defined radio implementation of polynomial cancellation coded orthogonal frequency division multiplexing (PCC-OFDM) on a field programmable gate array (FPGA) based hardware platform is presented in this paper. Previous publications on PCC-OFDM have demonstrated that, in comparison to Normal Cyclic Prefix based OFDM, it is robust in the presence of many impairments including carrier frequency offset, multipath distortion and phase noise. The error performance of the two multicarrier techniques is compared on a practical wireless channel under common channel impairments such as carrier frequency offset, multipath and noise. Based on the comparative results obtained on the hardware platform, the properties of PCC-OFDM make it a suitable candidate for consideration in future 5G applications requiring robust performance in asynchronous environments with minimal out of band spectral emissions.
Gayathri Kongara - One of the best experts on this subject based on the ideXlab platform.
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Implementation of PCC-OFDM on a software-defined radio testbed
Australian Journal of Telecommunications and the Digital Economy, 2017Co-Authors: Gayathri Kongara, Jean ArmstrongAbstract:A software-defined radio implementation of polynomial cancellation coded orthogonal frequency division multiplexing (PCC-OFDM) on a field programmable gate array (FPGA) based hardware platform is presented in this paper. Previous publications on PCC-OFDM have demonstrated that, in comparison to Normal Cyclic Prefix based OFDM, it is robust in the presence of many impairments including carrier frequency offset, multipath distortion and phase noise. The error performance of the two multicarrier techniques is compared on a practical wireless channel under common channel impairments such as carrier frequency offset, multipath and noise. Based on the comparative results obtained on the hardware platform, the properties of PCC-OFDM make it a suitable candidate for consideration in future 5G applications requiring robust performance in asynchronous environments with minimal out of band spectral emissions.
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PCC-OFDM on a software-defined radio testbed
Australian Journal of Telecommunications and the Digital Economy, 2017Co-Authors: Gayathri Kongara, Jean ArmstrongAbstract:A software-defined radio implementation of polynomial cancellation coded orthogonal frequency division multiplexing (PCC-OFDM) on a field programmable gate array (FPGA) based hardware platform is presented in this paper. Previous publications on PCC-OFDM have demonstrated that, in comparison to Normal Cyclic Prefix based OFDM, it is robust in the presence of many impairments including carrier frequency offset, multipath distortion and phase noise. The error performance of the two multicarrier techniques is compared on a practical wireless channel under common channel impairments such as carrier frequency offset, multipath and noise. Based on the comparative results obtained on the hardware platform, the properties of PCC-OFDM make it a suitable candidate for consideration in future 5G applications requiring robust performance in asynchronous environments with minimal out of band spectral emissions.
Fang Qian-jun - One of the best experts on this subject based on the ideXlab platform.
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A Channel Estimation Algorithm Based on Improved Spline Interpolation in LTE Systems
Telecommunication Engineering, 2011Co-Authors: Fang Qian-junAbstract:In the Long Term Evolution(LTE) system,the physical uplink control channel(PUCCH) format 1/1a/1b carries important control information,channel estimation of which has great impact on the system performance.In the condition of Normal Cyclic Prefix(CP),the second order or spline interpolation should be considered for PUCCH format 1/1a/1b to exploit three continuous pilots in one slot.To implement it efficiently in the TD-LTE test system,two interpolation algorithms are analysed and a better algorithm based on spline is proposed.The thought of stepwise extrapolation is adopted in the algorithm to estimate the data at the edge of the slot,and most of the computations are performed offline resulting in high performance at complexity reductions.
Deen A. Khamis - One of the best experts on this subject based on the ideXlab platform.
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Efficient Design and Implementation of LTE Downlink Control Information Decoder
International Journal of Computer Theory and Engineering, 2014Co-Authors: Mohamed S. Abo Zeid, Khaled M. F. Elsayed, Mohamed El Said Nasr, Deen A. KhamisAbstract: Abstract—The decoding of Downlink Control Information (DCI) in LTE is based upon a process that is defined as a blind decoding which depends on a number of decoding attempts on a number of Physical Downlink Control Channel (PDCCH) candidate locations for a number of defined DCI formats. In this paper, two proposed designs for DCI decoder are presented. The first decodes based upon monitoring PDCCH candidate locations serially. This design can perform the whole 44 decoding attempts within 87.3 % of the whole OFDM symbol time with extended Cyclic Prefix. So, it's well suited for Multicast/Broadcast over Single Frequency Network (MBSFN) subframes. However, this design doesn't meet the worst-case time of an LTE OFDM symbol with Normal Cyclic Prefix. Therefore, a second design is proposed that exploits parallelism to enable fast blind decoding process. The proposed parallel design proves efficiency in meeting decoding time constraints besides, consuming a little power with a proven efficiency in utilization area perspective. The proposed parallel design performs all of 44 decoding attempts in a time of 7.8 µs which is only 11.7 % of an LTE useful OFDM symbol time with a logic power consumption of only 17000 µW. The proposed designs are simulated using Modelsim 6.4a and implemented in Plan Ahead 14.4 in 28 nm technology, Virtex7 FPGA kit of part number XC7V2000T, which is characterized by high performance and large capacity.
Mohamed S. Abo Zeid - One of the best experts on this subject based on the ideXlab platform.
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Efficient Design and Implementation of LTE Downlink Control Information Decoder
International Journal of Computer Theory and Engineering, 2014Co-Authors: Mohamed S. Abo Zeid, Khaled M. F. Elsayed, Mohamed El Said Nasr, Deen A. KhamisAbstract: Abstract—The decoding of Downlink Control Information (DCI) in LTE is based upon a process that is defined as a blind decoding which depends on a number of decoding attempts on a number of Physical Downlink Control Channel (PDCCH) candidate locations for a number of defined DCI formats. In this paper, two proposed designs for DCI decoder are presented. The first decodes based upon monitoring PDCCH candidate locations serially. This design can perform the whole 44 decoding attempts within 87.3 % of the whole OFDM symbol time with extended Cyclic Prefix. So, it's well suited for Multicast/Broadcast over Single Frequency Network (MBSFN) subframes. However, this design doesn't meet the worst-case time of an LTE OFDM symbol with Normal Cyclic Prefix. Therefore, a second design is proposed that exploits parallelism to enable fast blind decoding process. The proposed parallel design proves efficiency in meeting decoding time constraints besides, consuming a little power with a proven efficiency in utilization area perspective. The proposed parallel design performs all of 44 decoding attempts in a time of 7.8 µs which is only 11.7 % of an LTE useful OFDM symbol time with a logic power consumption of only 17000 µW. The proposed designs are simulated using Modelsim 6.4a and implemented in Plan Ahead 14.4 in 28 nm technology, Virtex7 FPGA kit of part number XC7V2000T, which is characterized by high performance and large capacity.
