Open AccessPERFORMANCE ANALYSIS OF DS-CDMA SYSTEM FOR UNDERWATER ACOUSTIC COMMUNICATIONS
Author(s) -
Haoxin Kang
Publication year - 2021
Publication title -
international journal of engineering applied science and technology
Language(s) - English
Resource type - Journals
ISSN - 2455-2143
DOI - 10.33564/ijeast.2021.v05i09.007
Subject(s) - rake receiver , direct sequence spread spectrum , rake , spread spectrum , bit error rate , computer science , phase shift keying , underwater acoustic communication , code division multiple access , electronic engineering , channel (broadcasting) , telecommunications , algorithm , underwater , fading , engineering , mechanical engineering , oceanography , geology
We choose direct sequence spread spectrum(DSSS)technologies combined with Rake receiver under themodulation of BPSK to establish the communicationmodem. The performance of the modem is extensivelyinvestigated by MATLAB based simulation. We analysisthe bit error rates (BER) against signal to noise ratio (SNR)corresponding to different parameter settings, for instance,under different Pseudo noise (PN)codes, the long of PN codeperiod, the modulation schemes. Regarding to the Rakereceiver, we also compare the scatter plots to deducewhether rake has better performance than without rake,furthermore we change the taps of the rake and diversitycombining schemes to continue comparing the BERperformance. The modem is implemented in a linear timeinvariant (LTI)channel model.