In this paper, the performance of the various access techniques for the mobile computer network has been studied in the consideration of the characteristics of the mobile communication channel. According to the simulation results, it has been shown that the performance of the code division multiple access (CDMA) method is superior to that of the other packet access techniques such as carrier sensed multiple access (CSMA) when the fading effect or impulsive noise exists in the mobile channel. Also, in the case of the hidden node occurring, it could be seen that the performance of the CDMA technique is better than that of the other packet access methods in the view of the throughput and mean delay time.