Near Far Problem in CDMA using QPSK Modulation and P-CDMA

In this paper discus my research works on the near far problem in the CDMA network by using P-CDMA and QPSK modulation. There is different parameter that related to the near far problem like output probability, low gain, high gain, transmission capacity and interfaces between the channels. Fading play the important role in the near far problem so we must required the proper Rayleigh fading in the network. The interference between the channels creates the problem in signal quality so we must require precoding technology that specified the difference between the channels and improve the channel quality. To different shade the low gain signal and high gain signal we must required the threshold value that switch the signal from low to high and high to low gain. The threshold value for the gain depends on the distance between base station to mobile station and gain of the antenna. By using these different parameters we try to overcome the near far problem in the CDMA network. Network cellule area cover the small part to reduced the near far problem in the network. P-CDMA is used to reduce the near far problem in the network.