Date Added: Nov 2012
The tremendous increase in demand for wireless services has caused a search for techniques to improve the capacity of current digital communication systems. To bring this vision for future, the current state of wireless technology is necessary for major improvements. Direct Sequence Code Division Multiple Access (DS-CDMA) system is very popular over last few years. Code Division Multiple Access (CDMA) is one of the several methods of multiplexing wireless users. In CDMA, all users can transmit at the same time. Also, each user is allocated the entire frequency spectrum for transmission; hence, CDMA is also known as spread spectrum communications.