CDMA has been a strong candidate to support multimedia mobile services because it has the ability to cope with the asynchronous nature of the multimedia traffic and can provide higher capacity as opposed to the conventional access schemes such as TDMA or FDMA. The processing gain due to spreading provides robustness to the multi-user interference. The use of conventional CDMA does not seem to be realistic when the data rates go up to a hundred megabits per second due to severe ISI and the difficulty in synchronizing a fast sequence. Techniques for reducing the symbol and chip rate are essential in this case. Recent studies by researchers have combined the principle of CDMA with OFDM which allows one to use the available spectrum in an efficient way and retain the many advantages of a CDMA system. If the number and spacing between the subcarriers are chosen appropriately, it is unlikely that all the subcarriers will be in deep fade and thus provides frequency diversity.