Title :
Orthogonal UCHT sequences for asynchronous CDMA system
Author :
Lin, Zinan ; Rahardja, Susanto ; Ser, Wee
Author_Institution :
Sch. of Electr. & Electron. Eng., Nanyang Technol. Inst., Singapore
Abstract :
The orthogonal signature sequences in code division multiple access (CDMA) communications systems importantly influences how much interference from other users is received in a receiver, thus determining the overall performance of the system. In this paper, new sets of orthogonal sequences derived from the unified complex Hadamard transforms (UCHT) are proposed and studied. The various correlation properties of the sequences are presented for the first time. Finally, the performance of the UCHT sequences with other known sequences is compared
Keywords :
Hadamard transforms; code division multiple access; correlation methods; multiuser channels; radiofrequency interference; sequences; spread spectrum communication; asynchronous CDMA system; code division multiple access; code synchronisation; correlation properties; interference; orthogonal UCHT sequences; orthogonal signature sequences; receiver; system performance; unified complex Hadamard transforms; Autocorrelation; Bandwidth; Fading; Multiaccess communication; Multiple access interference; Signal processing; Spread spectrum communication; System performance; Upper bound;
Conference_Titel :
Spread Spectrum Techniques and Applications, 2000 IEEE Sixth International Symposium on
Conference_Location :
Parsippany, NJ
Print_ISBN :
0-7803-6560-7
DOI :
10.1109/ISSSTA.2000.876465
