2019 6th International Conference on Computing for Sustainable Global Development (INDIACom), 2019
In this paper, a multiuser cognitive radio (CR) system has been studied as well as analyzed by co... more In this paper, a multiuser cognitive radio (CR) system has been studied as well as analyzed by comparing two significant diversity schemes viz. Transmit antenna selection (TAS) with Space time block coding (STBC) at cognitive transmitter (CR-Tx). Each cognitive receiver (CR-Rx)is employing generalized selection combiner (GSC). The one best CR user is chosen out of all competing CR users on the context of highest instantaneous average signal to noise ratio (SNR) obtained at each CR-Rx. The improved average post processed SNR (APPSNR), Ergodic capacity $(C_{erg})$ and Average bit error rate (ABER) of both the proposed CR models i.e. scheduled TAS/GSC and scheduled STBC/GSC scenarios are functions of the best selected CR-Rx branches and the best CR user. The primary user (PU) outage constraint is satisfied by incorporating transmit power control policy which drives the CR-Tx to adjust its transmitted power. The analytical expressions are derived for all the above defined performance me...
Engineering Vibration, Communication and Information Processing, 2018
The internet of things (IoT) is the strongest potential candidate for future internet services. I... more The internet of things (IoT) is the strongest potential candidate for future internet services. It bridges the real and the virtual worlds. Cooperative communication is an enabling technology for the interconnection of the distributed heterogeneous entities. Cognitive IoT empowers the system to behave intelligently as the human brain does. Application of the human cognition model onto the IoT reduces the degree of human intervention. In order to make a decision by the system, reliability is a key factor which can be obtained from cooperative diversity technique such as distributed space-time block codes (DSTBC). In this work, we analyze the average bit error rate (ABER) of asynchronous distributed space-time block codes (ADSTBC) cooperative scheme in two-wave diffuse power (TWDP) fading channel. Closed-form expression of the performance metric is mathematically derived, analyzed, and verified by Monte Carlo simulation.
In this work, we have analysed the performance of a low density parity check (LDPC) coded Amplify... more In this work, we have analysed the performance of a low density parity check (LDPC) coded Amplify and forward (AF) based asynchronous distributed space time block coded (ADSTBC) cooperative system. The proposed concatenated LDPC-ADSTBC is delay tolerant, where LDPC codes provide coding gain to the system and ADSTBC provides diversity gain for arbitrary number of relays, number of symbols transmitted and number of receive antennas. For the multi-relay scenario, we have derived closed form expression for the pair-wise error probability (PEP) of the system. The derived analytical results of the performance of the proposed delay tolerant multiple relay asynchronous cooperative communication are validated by simulation results.
2019 6th International Conference on Computing for Sustainable Global Development (INDIACom), 2019
In this paper, a multiuser cognitive radio (CR) system has been studied as well as analyzed by co... more In this paper, a multiuser cognitive radio (CR) system has been studied as well as analyzed by comparing two significant diversity schemes viz. Transmit antenna selection (TAS) with Space time block coding (STBC) at cognitive transmitter (CR-Tx). Each cognitive receiver (CR-Rx)is employing generalized selection combiner (GSC). The one best CR user is chosen out of all competing CR users on the context of highest instantaneous average signal to noise ratio (SNR) obtained at each CR-Rx. The improved average post processed SNR (APPSNR), Ergodic capacity $(C_{erg})$ and Average bit error rate (ABER) of both the proposed CR models i.e. scheduled TAS/GSC and scheduled STBC/GSC scenarios are functions of the best selected CR-Rx branches and the best CR user. The primary user (PU) outage constraint is satisfied by incorporating transmit power control policy which drives the CR-Tx to adjust its transmitted power. The analytical expressions are derived for all the above defined performance me...
Engineering Vibration, Communication and Information Processing, 2018
The internet of things (IoT) is the strongest potential candidate for future internet services. I... more The internet of things (IoT) is the strongest potential candidate for future internet services. It bridges the real and the virtual worlds. Cooperative communication is an enabling technology for the interconnection of the distributed heterogeneous entities. Cognitive IoT empowers the system to behave intelligently as the human brain does. Application of the human cognition model onto the IoT reduces the degree of human intervention. In order to make a decision by the system, reliability is a key factor which can be obtained from cooperative diversity technique such as distributed space-time block codes (DSTBC). In this work, we analyze the average bit error rate (ABER) of asynchronous distributed space-time block codes (ADSTBC) cooperative scheme in two-wave diffuse power (TWDP) fading channel. Closed-form expression of the performance metric is mathematically derived, analyzed, and verified by Monte Carlo simulation.
In this work, we have analysed the performance of a low density parity check (LDPC) coded Amplify... more In this work, we have analysed the performance of a low density parity check (LDPC) coded Amplify and forward (AF) based asynchronous distributed space time block coded (ADSTBC) cooperative system. The proposed concatenated LDPC-ADSTBC is delay tolerant, where LDPC codes provide coding gain to the system and ADSTBC provides diversity gain for arbitrary number of relays, number of symbols transmitted and number of receive antennas. For the multi-relay scenario, we have derived closed form expression for the pair-wise error probability (PEP) of the system. The derived analytical results of the performance of the proposed delay tolerant multiple relay asynchronous cooperative communication are validated by simulation results.
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