Bit-wise parallel algorithms for efficient software correlation applied to a GPS software receiver

Author

Ledvina, Brent M. ; Psiaki, Mark L. ; Powell, Steven P. ; Kintner, Paul M.

Author_Institution

Sch. of Electr. & Comput. Eng., Cornell Univ., Ithaca, NY, USA

Volume

3

Issue

5

fYear

2004

Firstpage

1469

Lastpage

1473

Abstract

A set of efficient algorithms for processing code-division multiple-access spread spectrum signals has been developed. They make use of bit-wise parallelism to process 32 samples simultaneously. These algorithms have been implemented in a real-time global positioning system software receiver. The receiver consists of a radio-frequency front end, a system of shift registers, a digital data acquisition card, and software that runs on a 1.73-GHz PC. The PC performs base-band mixing and pseudorandom noise code correlations in a manner that directly simulates a hardware digital correlator.

Keywords

Global Positioning System; code division multiple access; correlation methods; data acquisition; radio receivers; software radio; spread spectrum communication; 1.73 GHz; DS-CDMA; GPS software receiver; Global Positioning System; baseband mixing; bit-wise algorithm; code division multiple access spread spectrum signals; digital data acquisition card; hardware digital correlator; radio-frequency front end; real-time global positioning; shift registers; software correlation; Global Positioning System; Multiaccess communication; Parallel algorithms; Radio frequency; Real time systems; Shift registers; Signal processing; Software algorithms; Software systems; Spread spectrum communication; CDMA; Code division multiple access; GPS; global positioning system; software radio; spread spectrum;

fLanguage

English

Journal_Title

Wireless Communications, IEEE Transactions on

Publisher

ieee

ISSN

1536-1276

Type

jour

DOI

10.1109/TWC.2004.833467

Filename

1343880