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Erschienen in:
27.06.2016
Design and Simulation of an Efficient Image Communication Scheme Via DS-CDMA
Erschienen in: Wireless Personal Communications | Ausgabe 1/2016
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Abstract
In this work, we try to design a DS-CDMA communication system model for the transmission of different types of images: binary, gray level and color. We adopted a transmission system of multiple users. During transmission of each image, we evaluated the noise and multiple access interference effects on the quality of DS-CDMA transmitted images which are inversely proportional to the length of the spreading sequence. Quality is assessed each time by the bit error rate (BER) estimation between received and original images. By increasing the signal to noise ratio to positive values, the BER tends to decrease, this results in a received image with fewer errors, thus without alteration which confirms Shannon equation. By using one user alone, the inter-user interference is canceled and the BER obtained is far lower than the BER obtained in presence of inter-user interferences. This can be resolved in hardware implementation using adequate filters.