Title :
Orthogonal complex-valued spreading sequences with a wide range of correlation properties
Author_Institution :
Dept. of Electr. Eng., Sydney Univ., NSW
fDate :
11/1/1997 12:00:00 AM
Abstract :
A new family of complex-valued spreading sequences was proposed for code-division multiple-access (CDMA) systems by Oppermann and Vucetic (1994, 1997), which offer the system designer the choice of a wide range of correlation properties. This letter identifies a subfamily of spreading sequences for use in CDMA systems in which the sequence elements in any set are orthogonal. The subfamily also offers a very wide range of values for both aperiodic auto-correlation (AC) and aperiodic cross-correlation (CC) functions with the added property of having orthogonal elements
Keywords :
code division multiple access; correlation theory; pseudonoise codes; sequences; spread spectrum communication; CDMA systems; DS-SS system; aperiodic auto-correlation functions; aperiodic cross-correlation functions; code-division multiple-access; correlation properties; direct sequence spread spectrum; orthogonal complex-valued spreading sequences; orthogonal elements; sequence elements; subfamily; Autocorrelation; Bit error rate; Channel capacity; Control systems; Degradation; Downlink; Equations; Multiaccess communication; Multiple access interference; Spread spectrum communication;
Journal_Title :
Communications, IEEE Transactions on
