Electronics Projects:CDMA

  

    Simulation of a CDMA encoding and decoding process:

       Code division multiple access (CDMA) is a channel access method used by various radio communication technologies. One of the concepts in data communication is the idea of allowing several transmitters to send information simultaneously over a single communication channel. This allows several users to share a band of frequencies. This concept is called multiple access. CDMA employs spread-spectrum technology and a special coding scheme (where each transmitter is assigned a code) to allow multiple users to be multiplexed over the same physical channel. By contrast, time division multiple access (TDMA) divides access by time, while frequency-division multiple access (FDMA) divides it by frequency. CDMA is a form of spread-spectrum signaling, since the modulated coded signal has a much higher data bandwidth than the data being communicated. 

         This project simulates a CDMA encoding and decoding process. The data is assumed to be travelled through a coaxial cable. The effect of coaxial cable and CDMA is considered. This simulation explains the encoding and decoding process of CDMA technique. Different parameters can be changed to verify the results for different conditions.