Title :
DS/CDMA signature sequences based on PR-QMF banks
Author :
Park, So Ryoung ; Song, Iickho ; Kwon, Hyoungmoon
Author_Institution :
Dept. of Electr. Eng. & Comput. Sci., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
fDate :
12/1/2002 12:00:00 AM
Abstract :
In this paper, we propose two classes of multivalued signature sequences for direct sequence code division multiple access (DS/CDMA) systems. The proposed classes are obtained from the coefficients of the subbands of perfect reconstruction quadrature mirror filterbanks (PR-QMF). The first and second classes are derived from the tree and lattice structure PR-QMF banks, respectively, and they both have perfect correlation properties for synchronous DS/CDMA systems. The second class, in addition, has generally better correlation properties than other well-known sequences in asynchronous DS/CDMA systems. Some numerical results for the performance of the asynchronous DS/CDMA systems with several sequences, including the second class of sequences, are obtained.
Keywords :
channel bank filters; code division multiple access; correlation methods; quadrature mirror filters; sequences; spread spectrum communication; trees (mathematics); DS-CDMA signature sequences; PR-QMF banks; correlation properties; direct sequence code division multiple access systems; first class; lattice structure; multivalued signature sequences; perfect reconstruction QMF banks; perfect reconstruction quadrature mirror filterbanks; second class; synchronous systems; tree structure; Autocorrelation; Bandwidth; Direct-sequence code-division multiple access; Frequency; Interference suppression; Mirrors; Mobile communication; Multiaccess communication; Multiple access interference; Spread spectrum communication;
Journal_Title :
Signal Processing, IEEE Transactions on
DOI :
10.1109/TSP.2002.805292
