Multistage Symbol-by-symbol Bayesian Interference Cancellation for Umts-cdma Links Affected by Severe Multipath
نویسندگان
چکیده
A simple multiuser detector (MUD) is proposed for UMTSCDMA links over channels affected by severe multipath. After coherent combining and despreading, for each user a suitable “Bayesian” memoryless non-linearity gives symbolby-symbol the expected values of the transmitted data. These are employed for soft removal of inter-symbol and multipleaccess interference from the received sequences. The procedure is iterated in a multistage structure until final harddecisions are taken. The proposed Multistage Bayesian MUD exhibits low complexity and better performance (close to the ideal canceller) than other known solutions, even in presence of channel estimation errors. 1
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