Title :
Acquisition performance of Gold sequence based DS-CDMA systems
Author :
Lee, Yong-Hwan ; Kim, Seung-Jun
Author_Institution :
Sch. of Electr. Eng., Seoul Nat. Univ., South Korea
Abstract :
The performance of sequence acquisition for Gold sequence based DS-CDMA systems is studied in this paper. We consider the use of a sliding correlator-type structure for the acquisition scheme. Since acquisition of a PN sequence in DS-CDMA systems can be formulated as testing two simple hypotheses, we apply fixed sample size for the synchronization test. The acquisition schemes require the knowledge of the partial correlation of Gold sequences, which is difficult to model. We propose the use of an approximate upper bound and then further linearize it for ease of designing the test scheme. The acquisition performance of Gold sequence based DS-CDMA systems is analyzed and is compared to that of m-sequence based ones. Numerical results indicate that the use of Gold sequences is very suitable for DS-CDMA systems. In addition, analytical results are verified by computer simulation
Keywords :
Gaussian channels; binary sequences; code division multiple access; correlation methods; phase shift keying; pseudonoise codes; spread spectrum communication; synchronisation; BPSK modulation; DS-CDMA systems; Gold codes; Gold sequences; PN sequence; approximate upper bound; fixed sample size; hypothesis testing; numerical results; partial correlation; sequence acquisition performance; sliding correlator-type structure; synchronization test; AWGN; Binary phase shift keying; Computer simulation; Frequency selective surfaces; Gold; Multiaccess communication; Performance analysis; Phase modulation; System testing; Upper bound;
Conference_Titel :
Personal, Indoor and Mobile Radio Communications, 1997. Waves of the Year 2000. PIMRC '97., The 8th IEEE International Symposium on
Conference_Location :
Helsinki
Print_ISBN :
0-7803-3871-5
DOI :
10.1109/PIMRC.1997.630933
