On the joint detection SAIC algorithm in asynchronous GSM network

Author

Tian, Zhigang ; Guo, Wenbin ; Yang, Dacheng

Author_Institution

Sch. of Telecommun. Eng., Beijing Univ. of Posts & Telecommun., China

Volume

2

fYear

2005

fDate

30 May-1 June 2005

Firstpage

738

Abstract

As a crucial convolution step, SAIC (single antenna interference cancellation) has been introduced into GSM system. Great capacity gain could be achieved with SAIC applied, and a feasible study is being conducted in 3GPP. Since most of GSM networks are operated in asynchronous mode, the development and evaluation of SAIC algorithm in asynchronous network is necessary. Equivalent discrete channel model of interference in asynchronous case is analyzed, and one symbol more ISI is caused for asynchronous interference than synchronous desired signal. The asynchronous model brings about some obstacles to the channel estimation and detection. Refined JMLSE (joint maximum likelihood sequence estimation) is developed to deal with asynchronous model. Two LS (least square) channel estimation methods - joint LS (JLS) and iterative LS (ILS) - are also proposed to provide JMLSE channel information and their performances are analyzed in asynchronous case.

Keywords

3G mobile communication; cellular radio; channel estimation; interference suppression; intersymbol interference; least squares approximations; maximum likelihood sequence estimation; mobile radio; 3GPP; ISI; asynchronous GSM network; asynchronous interference; capacity gain; channel detection; channel estimation; discrete channel model; iterative least square; joint least square; joint maximum likelihood sequence estimation; least square channel; single antenna interference cancellation; Channel estimation; Convolution; GSM; Interference cancellation; Intersymbol interference; Iterative methods; Least squares approximation; Maximum likelihood detection; Maximum likelihood estimation; Signal analysis; Asynchronous; GSM; JMLSE; Least square; SAIC;

fLanguage

English

Publisher

ieee

Conference_Titel

Vehicular Technology Conference, 2005. VTC 2005-Spring. 2005 IEEE 61st

ISSN

1550-2252

Print_ISBN

0-7803-8887-9

Type

conf

DOI

10.1109/VETECS.2005.1543402

Filename

1543402