Semi-Blind HEBB-PPIC Multiuser Detection Algorithm
نویسندگان
چکیده
منابع مشابه
Partially Blind Multiuser Detection
| Multiple access interference (MAI) is a signi cant limiting factor in the performance of direct sequence code division multiple access (DS-CDMA) systems. Various multiuser detection techniques have been developed to combat the e ects of MAI. These detection techniques either assume the knowledge of all the users in the system (conventional) or assume the knowledge of the user of interest only...
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The decorrelating detector and the linear minimum mean-square error (MMSE) detector are known to be effective strategies to counter the presence of multiuser interference in code-division multiple-access channels; in particular, those multiuser detectors provide optimum near-far resistance. When training data sequences are available, the MMSE multiuser detector can be implemented adaptively wit...
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We explore the identifiability conditions for blind and semi-blind multiuser multichannel identification. Starting with the deterministic approach, we compare the identifiability conditions on the channel and the sources of training sequence based channel identification, blind and semi-blind channel identification. Further on, we use the stochastic approach with Gaussian priors for the source s...
متن کاملBlind multiuser detection via interference identification
Previous results on blind multiuser detection apply in situations where the signal parameters of the users of interest are known, and those of the interferers are unknown. In this paper, we consider the new paradigm of an -user system, in which users are active, and the problem is to detect users of interest out of those active users when the signal parameters (codes, amplitudes) of the users o...
متن کاملProbabilistic algorithms for blind adaptive multiuser detection
In this paper, two probabilistic adaptive algorithms for jointly detecting active users in a DS-CDMA system are reported. The first one, which is based on the theory of hidden Markov models (HMM’s) and the Baum–Wech (BW) algorithm, is proposed within the CDMA scenario and compared with the second one, which is a previously developed Viterbi-based algorithm. Both techniques are completely blind ...
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ژورنال
عنوان ژورنال: Energy Procedia
سال: 2012
ISSN: 1876-6102
DOI: 10.1016/j.egypro.2012.02.143