Performance of Turbo Coded Vertical Bell Laboratories Layered Space Time Multiple Input Multiple Output system

Abstract

In this paper, performance of a Turbo Code (TC) and Vertical Bell Laboratories Layered Space Time (VBLAST) encoded wireless link is evaluated in the presence of Rayleigh fading for Multiple-Input Multiple-Output (MIMO) system. Turbo encoded bits are modulated using QPSK or 16 QAM or 64 QAM modulator and modulated data are further encoded using VBLAST and then split into n streams which are simultaneously transmitted through n transmit antennas. Simulation results obtained show that coded MIMO system provides 17 to 25 dB coding gain for different combination of transmit and receive antennas at a BER of 10 -3 compared to uncoded MIMO system. And there is around 2 to 8 dB gain for increasing number of transmitting antennas from 2 to 3 or 3 to 4. On the other hand, capacities for (2 T x , 2 R x ), (3 T x , 3 R x ) and (4 T x , 4 R x ) are almost same from 0dB to 10dB but change significantly with increasing SNR from 10dB.

RETRACTED: SVM‐based generative adverserial networks for federated learning and edge computing attack model and outpoising

“…We investigate the setting for the adversary network for the poison attack, the assumption, the first case, taken as perfect knowledge gained by the adversary on the target classifier ( P TC ) and known feature space t ( x ).The second case, is that adversaries gained the less or limited knowledge ( L TC ), target classifier. We assumed that attacker may have knowledge of features representation, but not the training dataset (Rathore et al, 2022; Poongodi, Bourouis et al, 2022; Ramesh, Lihore et al, 2022; Poongodi, Malviya, Hamdi et al, 2022; Poongodi, Malviya, Kumar et al, 2022; Poongodi, Hamdi, & Wang 2022; Poongodi et al, 2021; Ramesh, Vijayaragavan et al, 2022; Hamdi et al, 2022; Poongodi, Hamdi, Malviya et al, 2022; Kamruzzaman 2021; Hossain et al, 2022; Chen et al, 2019; Kamruzzaman 2013, 2014; Zhang et al, 2021; Hossain, Kamruzzaman et al, 2022; Sarker et al, 2021; Shi et al, 2020; Chen et al, 2020).…”

Performance of Relay Assisted STBC Coded MIMO Wireless Downlink Communication

“…One is transmit diversity in which different duplicates of the same transmission sequence are transmitted through different transmission antennas. One of the typical transmit diversity technique is Space Time Block Coding (STBC) [5][6][7][8] 31 transmitting multiplexing technique is Bell Labs Layered Space-Time (BLAST) [9][10][11][12]. In this paper we have used STBC to show the performance of our system.…”