Iterative construction of optimum signature sequence sets in synchronous CDMA systems
نویسندگان
چکیده
منابع مشابه
Iterative construction of optimum signature sequence sets in synchronous CDMA systems
Recently, optimum signature sequence sets that maximize the capacity of single-cell synchronous code division multiple access (CDMA) systems have been identified. Optimum signature sequences minimize the total squared correlation (TSC); they form a set of orthogonal sequences, if the number of users is less than or equal to the processing gain, and a set of Welch bound equality (WBE) sequences,...
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In this paper we characterize the user capacity i e the maximum number of supportable users at a common SIR target level for a xed processing gain of a single cell symbol asynchronous CDMA system Based on the delay pro le of the users we identify a class of optimum signature sequences that achieve a lower bound on the total squared asynchronous correlation TSAC among the users When the users si...
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The sum capacity on a symbol-synchronous CDMA system having processing gain N and supporting K power constrained users is achieved by employing at most 2N 1 sequences. Analogously, the minimum received power (energy-per-chip) on the symbol-synchronous CDMA system supporting K users that demand specified data rates is attained by employing at most 2N 1 sequences. If there are L oversized users i...
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We characterize the user capacity, i.e., the maximum number of supportable users at a common SIR target level for a fixed processing gain, of a single-cell symbol asynchronous CDMA system. We show that the user capacity of an asynchronous system is the same as the user capacity of a synchronous system; that is there is no loss in user capacity due to asynchrony. Optimum signature sequences are ...
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ژورنال
عنوان ژورنال: IEEE Transactions on Information Theory
سال: 2001
ISSN: 0018-9448
DOI: 10.1109/18.930932