Imperfect Code Synchronization Effects on Narrowband Interference Rejection in a DS/DPSK Spread Spectrum Receiver

Author

Goldberg, Steven H. ; Iltis, Ronald A.

Author_Institution

Department of Electrical and Computer Engineering, University of California, Santa Barbara, California 93106

Volume

2

fYear

1986

fDate

5-9 Oct. 1986

Abstract

The impact of imperfect synchronization on the performance of prediction-error interference rejection filters in noncoherent direct-sequence (DS) spread spectrum communications is considered. Bit error rate (BER) analysis of binary DPSK data modulation used in conjuction with direct-sequence spread spectrum (DSSS) is used as a performance measure. A first order noncoherent delay-lock loop is used for the pseudonoise code tracking. Conditional BER results for the DS/DPSK system for fixed values of the code tracking error are obtained [1]. The average BER of the system is then evaluated by averaging the conditional BER expressions over the probability density function of the code tracking error. Results include the effects of both a single fading tone and narrowband gaussian interferer on the overall system performance.

Keywords

Bit error rate; Delay; Differential quadrature phase shift keying; Error analysis; Filters; Interference; Narrowband; Performance analysis; Spread spectrum communication; Tracking loops;

fLanguage

English

Publisher

ieee

Conference_Titel

Military Communications Conference - Communications-Computers: Teamed for the 90's, 1986. MILCOM 1986. IEEE

Type

conf

DOI

10.1109/MILCOM.1986.4805740

Filename

4805740