Joint equalization and interference suppression for high data rate wireless systems

Citation
Sl. Ariyavisitakul et al., Joint equalization and interference suppression for high data rate wireless systems, IEEE J SEL, 18(7), 2000, pp. 1214-1220
Citations number
15
Categorie Soggetti
Information Tecnology & Communication Systems
Journal title
IEEE JOURNAL ON SELECTED AREAS IN COMMUNICATIONS
ISSN journal
07338716 → ACNP
Volume
18
Issue
7
Year of publication
2000
Pages
1214 - 1220
Database
ISI
SICI code
0733-8716(200007)18:7<1214:JEAISF>2.0.ZU;2-N
Abstract
Enhanced Data Rates for Global Evolution (EDGE) is currently being standard ized as an evolution of GSM in Europe and of IS-136 in the United States as an air interface for high speed data services for third generation mobile systems. In this paper, we study space-time processing for EDGE to provide interference suppression. We consider the use of two receive antennas and p ropose a joint equalization and diversity receiver. This receiver uses feed forward filters on each diversity branch to perform minimum mean-square err or cochannel interference suppression, while leaving the intersymbol interf erence to be mitigated by the subsequent equalizer. The equalizer is a dela yed decision feedback sequence estimator, consisting of a reduced-state Vit erbi processor and a feedback filter. The equalizer provides soft output to the channel decoder after deinterleaving. We describe a novel weight gener ation algorithm and present simulation results on the link performance of E DGE with interference suppression. These results show a significant improve ment in the signal-to-interference ratio (SIR) performance due to both dive rsity (against fading) and interference suppression. At a 10% block error r ate, the proposed receiver provides a 20 dB improvement in SIR for both the typical urban and hilly terrain profiles.