DESAIN PROGRAM SIMULASI UNJUK KERJA KODE LARGE KASAMI PADA SISTEM KOMUNIKASI DIRECT SQUENCE SPREAD SPECTRUM MELALUI KANAL MULTIPATH FADING

Abstract

Selection of Pseudo Noise (PN) code in CDMA multiple access is needed to overcome
problems related to interference. In this study, we simulate the large kasami code with the aim
of knowing the performance of the large kasami code on flat fading channels and frequency
selective fading channels with variations in the number of multipath components. The receiver
system uses a correlation receiver to correlate the code used by each user. The simulation
results from the performance of the large kasami code through the flat fading channel show that
the simulation carried out is valid, where the simulation BER value is close to the flat theoretical
BER value. The frequency selective fading channel shows different BER values from variations
in the number of multipath components, where the multipath 60 component produces the worst
BER value. Auto correlation code large kasami has a value when the time is not equal to zero
which can interfere with the desired signal and there is a cross-correlation signal level value that
will interfere with each other's users.