On the performance gain of multiple cell-site processing in randomly spread DS-CDMA cellular systems

Benjamin M. Zaidel, Oren Somekh, Shlomo Shamai

Research output: Contribution to conferencePaperpeer-review

Abstract

We consider a chip-interleaved randomly spread DS-CDMA scheme employed in two variants of Wyner's infinite linear cell-array model with flat fading. Focusing on the asymptotic setup in which both the number of users per cell and the processing gain go to infinity, while their ratio (the "cell load") goes to some finite constant, the spectral efficiencies of the optimum and linear MMSE joint multi-cell receivers are considered. Dramatic performance enhancement as compared to single-cell-site processing is demonstrated. The asymptotic behavior of the two receivers in extreme SNR regimes and in a high cell-load setup are analyzed as well. The impact of chip-interleaving vs. symbol-interleaving is also investigated. Chip-level interleaving is found beneficial in several cases of interests, and it is conjectured to be beneficial in general.

Original languageEnglish
Pages219-222
Number of pages4
StatePublished - 2004
Externally publishedYes
Event2004 23rd IEEE Convention of Electrical and Electronics Engineers in Israel, Proceedings - Tel-Aviv, Israel
Duration: 6 Sep 20047 Sep 2004

Conference

Conference2004 23rd IEEE Convention of Electrical and Electronics Engineers in Israel, Proceedings
Country/TerritoryIsrael
CityTel-Aviv
Period6/09/047/09/04

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