Title :
Asymptotic design and analysis of linear detectors for CDMA systems
Author :
Cottatellucci, Laura ; Müller, Ralf R. ; Debbah, Mérouane
Author_Institution :
Telecomm. Res. Center, Vienna, Austria
fDate :
27 June-2 July 2004
Abstract :
The asymptotic performance of the linear MMSE detector for any finite observation window and any symbol impinging the observed signal is derived for asynchronous but chip synchronous CDMA systems with random spreading. Additionally, a multistage detector that does not suffer from windowing effects and performs as well as the correspondent detector in synchronous systems is proposed. In contrast to the synchronous case, considering a sufficient large delay, the proposed multistage detector can even outperform the full rank linear MMSE detector constrained to a finite fixed observation window.
Keywords :
code division multiple access; least mean squares methods; random codes; asymptotic design; chip synchronous-asynchronous CDMA system; code division multiple access; finite observation window; linear MMSE detector; minimum mean squared error; multistage detector; random spreading; Additive white noise; Bandwidth; Delay; Detectors; Eigenvalues and eigenfunctions; Information analysis; Information theory; Interference; Multiaccess communication; Signal to noise ratio;
Conference_Titel :
Information Theory, 2004. ISIT 2004. Proceedings. International Symposium on
Print_ISBN :
0-7803-8280-3
DOI :
10.1109/ISIT.2004.1365546
