The Performance Analyzing And Simulating Of Two Kinds Of Linear-Multiuser Detactor In CDMA

CDMA(Code division multiple access)Spread Spectrum communication became one of the communication ways with wide developing prospect ,and has being applied to military communication and civil communication extensively. Especially in recently about ten years ,because CDMA communication is rapidly developing and the amount of users is increasing in striking speed, the capability of communication give prominence to fall .Because capacity of channel is limited by interference ,especially for the interference from the same channels and the adjacent channels .Therefore , multiuser detection technology has became a new hotspot in the research of mobile communication.The advantages of the multiuser detection in mitigating multiple access interference (MAI) in CDMA systems were concerned within the worldwide in the recent years. There are many progresses to have been made on multiuser detection, but the applications of multiuser detection technology for commerce or practical engineering have not been solved yet. In order to deepen the research on multiuser detection and speed up the process of its entering into the commercial markets, we have studied the problem of multiuser detection based on CDMA systems in the paper. The paper focus on AWGN signal channel, and compare the whole performance of two Linear-Multiuser Detection of the CDMA system. By simulating and analyzing it, the paper get the results respectively and compare them to each other.Meanwhile, to elevate the efficiency of computation, a new method has been developed to reduce computing time by changing sample rate used during the system simulation. All the results obtained from the...