A Spread-Spectrum Concept Combining Chirp Modulation and Pseudonoise Coding

Author

Kowatsch, Max ; Lafferl, Johann T.

Author_Institution

Technische Universität Wien, Vienna, Australia

Volume

31

Issue

10

fYear

1983

fDate

10/1/1983 12:00:00 AM

Firstpage

1133

Lastpage

1142

Abstract

This paper investigates the combination of chirp modulation and pseudonoise phase shift keying for spread-spectrum transmission of digital data. Data encoding is accomplished by assignment of positive and negative dispersive slope chirps for binary ones and zeros. Each chirp is then modulated by one period of a PN signature sequence. The performance in additive white Gaussian noise is analyzed, measures of performance being mean acquisition time, mean hold-in time, and bit error probability. Calculated and experimental results are presented for a 105 kbit/s modem. In the test system, SAW dispersive delay lines with a bandwidth of 16.4 MHz and 9.5 μs dispersion time serve for the key operations of chirp generation and pulse compression, and the signature codes are 127 bit $m$ -sequences.

Keywords

CDMA (code-division multiple-access); Chirp modulation; Code division multiaccess (CDMA); Code-division multiple-access; Data communications; Phase-shift keying; Pseudonoise-coded communication; Additive white noise; Chirp modulation; Dispersion; Encoding; Error probability; Noise measurement; Performance analysis; Phase shift keying; Spread spectrum communication; Time measurement;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/TCOM.1983.1095745

Filename

1095745