شماره ركورد :
15761
عنوان به زبان ديگر :
Performance Evaluations and Comparisons of Several LDPC Coded MC-FH-CDMA Systems
پديد آورندگان :
Behroozi H نويسنده , Haghighat J نويسنده , Nasiri-Kenari M نويسنده , Jamali S H نويسنده
از صفحه :
337
تا صفحه :
347
تعداد صفحه :
11
چكيده لاتين :
In this paper, the application of regular Low-Density Parity-Check (LDPC) codes in Multi-Carrier Frequency-Hopping (MC-FH) CDMA systems is studied. To this end, different well-known constructions of regular LDPC codes are considered and the performance of LDPC coded MC-FH-CDMA systems, based on these constructions, are evaluated and compared in a frequency-selective slowly Rayleigh fading channel. These results are compared with those previously reported for super-orthogonal convolutionally coded MC-FH-CDMA systems. The simulation results indicate that the LDPC coded MC-FH-CDMA system significantly outperforms the uncoded and super-orthogonal convolutionally coded schemes. To alleviate the restrictions imposed by well known LDPC construction methods when applied to the coded MC-FH-CDMA system considered, a new semi-random construction is proposed and its performance is evaluated in the coded scheme. The simulation results indicate that this new construction substantially outperforms other well-known construction methods in the application considered.
شماره مدرك :
1199460
لينک به اين مدرک :
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