We propose a very fast-convergence joint iterative detection and decoding (JIDD) scheme for channel-coded sparse code multiple access (SCMA). In the conventional JIDD, all users’ channel iterations are performed in parallel after variable nodes SCMA factor graph updated. The proposed JIDD scheme, however, slices into per-user decoding, inserts them deeply graph. By doing this, message enhanceme...

The SCMA codebook design is based on star-QAM signalling constellations with operating several segmentations to generate the different user’s while considering MED maximization as criterion design. In addition, we constructed mapping matrix F using Progressive Edge Growth (PEG) algorithm which facilitate iterative decoding performance of message passing (MPA). At end, a comparison similar studi...

this study was an attempt to find out whether co-teaching model has statistically any significant impact on improving motivation and achievement of iranian young efl learners or not. the study was conducted at salehin english language department in tehran. to accomplish the purpose of this study, the researchers chose a sample of 91 participants which was reduced to 62 homogenous students throu...

this paper presents a hybrid technique for simultaneous estimation of parameter and function in inverse heat conduction problems. no prior information is used for the functional form of the heat flux in the present study. the scheme presented here is a combination of two different classical methods: the variable metric method (vmm) and gauss method (gm). the determination of the unknown thermal...