TUTCRIS - Tampereen teknillinen yliopisto

TUTCRIS

Multiuser detection scheme for SCMA with partial extrinsic information transmission

Tutkimustuotosvertaisarvioitu

Yksityiskohdat

AlkuperäiskieliEnglanti
Sivut2320-2326
Sivumäärä7
JulkaisuXi Tong Gong Cheng Yu Dian Zi Ji Shu/Systems Engineering and Electronics
Vuosikerta39
Numero10
DOI - pysyväislinkit
TilaJulkaistu - 1 lokakuuta 2017
OKM-julkaisutyyppiA1 Alkuperäisartikkeli

Tiivistelmä

To deal with the huge burden to the function node (FN) in each decoding iteration in sparse code multiple access (SCMA) by using message passing algorithm (MPA), this paper first derives some statistical observation for the probability density function of received signals at various signal-to-noise ratios (SNRs) by using the Monte Carlo method. Then based on a detailed analysis between the probability density function value of received signals and external information values, a threshold decision scheme is introduced into MPA, therefore a partial extrinsic information transmission of MPA (PEIT-MPA) is proposed. Simulation results show that the proposed PEIT-MPA efficiently relieves the implementation complexity of MPA, especially at the case of high SNR, meanwhile keeps the bit error ratio and convergence rate from degrading noticeably.