Title :
Upper bounds on the access code efficiency for CDMA using signals with an interference free window
Author :
Li, Xiangming ; Soleymani, M.R. ; Gao, Yingzi
Author_Institution :
Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que., Canada
Abstract :
Current CDMA systems suffer from both multiple access interference (MAI) and inter-symbol interference (IS). MAI is due to the non-zero cross-correlation side lobes, while ISI is due to the non-zero auto-correlation side lobes. Recently, the use of codes that are interference free over a window has been proposed. The problem with these codes is that their capacity is limited due to dimension limitation. This paper establishes upper bounds on the access code efficiency for signals with an interference free window.
Keywords :
code division multiple access; codes; correlation methods; intersymbol interference; DMA; ISI; MAI; access code efficiency; autocorrelation side lobes; cross-correlation side lobes; interference free window; intersymbol interference; multiple access interference; upper bounds; Autocorrelation; ISO; Multiaccess communication; Multiple access interference; Neodymium; Upper bound;
Conference_Titel :
Vehicular Technology Conference, 2003. VTC 2003-Spring. The 57th IEEE Semiannual
Print_ISBN :
0-7803-7757-5
DOI :
10.1109/VETECS.2003.1207807
