Title :
Precoding for improved performance of Welch-bound signature sets
Author :
Lehtonen, Eero ; Paavola, Jarkko ; Dudkov, Alexey ; Hurnanen, Tero
Author_Institution :
Dept. of Inf. Technol., Univ. of Turku, Turku, Finland
Abstract :
Welch-bound signature sets are optimal for oversaturated synchronous CDMA in terms of minimizing the multiple access interference. In this paper, precoding of the sum signal of Welch-bound signatures, in order to maximize the mean signal-to-interference ratio for conventional receivers, is analysed. The gain compared to normal sum signal is calculated, and also the effect on the energy of the sum signal is derived.
Keywords :
code division multiple access; precoding; radio receivers; radiofrequency interference; Welch-bound signature set; multiple access interference; normal sum signal; oversaturated synchronous CDMA; precoding; receiver; signal-to-interference ratio; Baseband; Code division multiplexing; Direct-sequence code-division multiple access; Downlink; Information technology; Matched filters; Multiaccess communication; Multiple access interference; Signal analysis; Transmitters;
Conference_Titel :
MELECON 2010 - 2010 15th IEEE Mediterranean Electrotechnical Conference
Conference_Location :
Valletta
Print_ISBN :
978-1-4244-5793-9
DOI :
10.1109/MELCON.2010.5475978
