Early-Stopping for RAKE Receivers

Author

Han, Sung-Chul ; Negi, Rohit

Author_Institution

Dept. of Electr. & Comput. Eng., Carnegie Mellon Univ., Pittsburgh, PA

fYear

2005

fDate

7-7 Sept. 2005

Firstpage

245

Lastpage

249

Abstract

In this paper, a statistical method to reduce the computation in a spread-spectrum RAKE receiver is proposed. The fundamental idea is to stop the integration of the received signal during despreading earlier than in the conventional RAKE, when the intermediate integrated output is greater than a predefined threshold. With minimal changes in RAKE implementation, this technique can provide at least 40% savings in the number of chips to be integrated with BPSK transmission at 7 dB of SNR. We present the analysis on the performance of the proposed scheme for a single finger case, and extend the result to a multi-finger RAKE. The simulation results under Rayleigh multi-path fading channel show that there can be computation savings between 60% and 80% depending on the channel profile

Keywords

Rayleigh channels; multipath channels; phase shift keying; radio receivers; spread spectrum communication; statistical analysis; BPSK transmission; Rayleigh multipath fading channel; SNR; chips; despreading; multifinger RAKE; received signal; single finger case; spread-spectrum RAKE receiver; statistical method; Binary phase shift keying; Bit error rate; Fading; Fingers; Matched filters; Military computing; Multipath channels; Signal to noise ratio; Spread spectrum communication; Timing;

fLanguage

English

Publisher

ieee

Conference_Titel

Wireless Communication Systems, 2005. 2nd International Symposium on

Conference_Location

Siena

Print_ISBN

0-7803-9206-X

Type

conf

DOI

10.1109/ISWCS.2005.1547696

Filename

1547696