Modified maximal ratio combining HARQ scheme for HSDPA

Author

Semenov, Sergei

Author_Institution

Nokia, Salo, Finland

Volume

4

fYear

2004

fDate

5-8 Sept. 2004

Firstpage

2451

Abstract

One of the main evolutions of the WCDMA standard is the high-speed downlink packet access (HSDPA) concept, which offers peak data rates exceeding 10 Mbps. A hybrid automatic repeat request (HARQ) plays an important role in HSDPA. In this paper the impact of the combining scheme in HARQ to the system performance is considered. A conventional maximal ratio combining (MRC) is not an optimal method of combining (re)transmissions for the HARQ under the condition of the imperfect channel estimation. A modified MRC method is proposed, which allows decreasing the impact of the errors in the channel estimates to the performance of HSDPA.

Keywords

automatic repeat request; broadband networks; channel estimation; code division multiple access; packet radio networks; radio links; HARQ scheme; HSDPA; WCDMA standard; channel estimation; code division multiple access; conventional maximal ratio combining; high-speed downlink packet access; hybrid automatic repeat request; Automatic repeat request; Channel estimation; Decoding; Diversity reception; Downlink; Multiaccess communication; Protocols; Surface acoustic waves; System performance; Transmitters;

fLanguage

English

Publisher

ieee

Conference_Titel

Personal, Indoor and Mobile Radio Communications, 2004. PIMRC 2004. 15th IEEE International Symposium on

Print_ISBN

0-7803-8523-3

Type

conf

DOI

10.1109/PIMRC.2004.1368760

Filename

1368760