Abstract
MATLAB platform using SIMULINK simulation visualization features, combined
with the actual CDMA communications, the use of MATLAB to form a complete
CDMA communication system, the completion of the overall design, to achieve a
complete end-to-end is sent to the receiver of the CDMA wireless communication
system modeling , simulation and analysis ; Describes the key features of CDMA
(including spread spectrum technology, error control techniques, modulation techniques,
channel, etc.) parameters. Single-user channel in different environments, channel noise
impact on the results, the greater the noise power, the greater the system bit error rate.
Multi-user channel in the same simulation environment, as is the noise power of 0.01W
transmission channel environment, so in the case of single-user bit error rate is 0, while
the increase in the number of users, the error rate also increase. Can be seen that the
signal during transmission, in addition to being the impact of channel noise, but also the
existence of multiple access interference, and single-frequency interference, narrowband
interference, jamming, such as tracking, mainly multiple access interference.
Key words: Code Division Multiple Access;communication ; system;visualizing
simulation;MATLAB;SIMULINK
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