Title :
New BCH-derived sequences for CDMA systems
Author :
Ricardo, Cesaltina N E ; Inacio, Jose A L ; Gerald, José António B ; Ortigueira, Manuel D.
Author_Institution :
Escola Nautica Infante D. Henrique, Oeiras, Portugal
Abstract :
New BCH-derived PN-EB (pseudo-noise even balanced) sequences suitable to be used in CDMA systems are presented in this paper. It is assumed a new definition for processing gain, which better accounts for the system performance regarding the narrow band noise rejection, and it is shown how to obtain high processing gain values, namely, by using zero mean spreading signals in channels with selective noise. The new sequences have low autocorrelation levels, exist in large numbers and can provide higher processing gain with selective noise.
Keywords :
BCH codes; binary sequences; code division multiple access; pseudonoise codes; spread spectrum communication; BCH sequence; CDMA system; autocorrelation level; narrow band noise rejection; processing gain; pseudo noise even balanced sequence; selective noise; system performance; zero mean spreading signal; Bandwidth; Bit rate; Multiaccess communication; Performance gain; Pulse generation; Signal generators; Signal processing; Signal to noise ratio; Spread spectrum communication; System performance;
Conference_Titel :
Circuits and Systems, 2003 IEEE 46th Midwest Symposium on
Print_ISBN :
0-7803-8294-3
DOI :
10.1109/MWSCAS.2003.1562523
