Title :
Multicell spreading sequence design algorithm for overloaded S-CDMA
Author_Institution :
Texas Univ., San Antonio, TX, USA
Abstract :
An algorithm for the design of the overloaded complex spreading sequence sets on the uplink of multicell synchronous S-CDMA systems is introduced. Assuming that in each cell the number of active users K is greater than the corresponding processing gain N, the total weighted squared correlation (TWSC) criterion is used as a performance measure. The mathematical formalism is supported with selected numerical examples in the multicell context.
Keywords :
cellular radio; code division multiple access; correlation methods; interference suppression; sequences; spread spectrum communication; TWSC; WBE; generalized Welch bound equality sequence; interference avoidance; multicell S-CDMA system; multiple access design; spread spectrum system; spreading sequence set; synchronous code division multiple access; total weighted squared correlation criterion; uplink; Algorithm design and analysis; Convergence; Correlation; Eigenvalues and eigenfunctions; Gain measurement; Interference; Performance gain; Spread spectrum communication;
Journal_Title :
Communications Letters, IEEE
DOI :
10.1109/LCOMM.2005.1576577
