Accession Number : ADA186288

Title :   Measured Noise Performance of a Direct-Sequence Spread-Spectrum System and a Comparison of Single- Vice Dual-Channel Delay-Lock Loops.

Descriptive Note : Master's thesis,

Corporate Author : NAVAL POSTGRADUATE SCHOOL MONTEREY CA

Personal Author(s) : Bartone, Chris G

PDF Url : ADA186288

Report Date : Sep 1987

Pagination or Media Count : 104

Abstract : A direct-sequence (DS) spread spectrum system which could be used by a conventional amplitude modulated (AM) radio system was designed, built and tested. A delay-lock loop was used to provide code synchronization in the receiver. The noise performance of single-channel delay-lock loop (DCDLL) with no data being transmitted. When data was transmitted a DCDLL was used and the noise performance (probability of bit error) of the DS spread spectrum system was measured. Test results indicate that SCDLL performs as well as or better than the DCDLL. The measured noise performance advantage relative to the DCDLL and that this DS spread spectrum can be used to transmit low rate digital data reliably at values of SNR much than unity. It is recommended that this DS spread spectrum system be considered by the Department of Defense to be implemented in AM radio system to provide low data rate-anti-jam-interference rejection capability.

Descriptors :   *COMMUNICATION AND RADIO SYSTEMS, *SPREAD SPECTRUM, *SYNCHRONIZATION(ELECTRONICS), AMPLITUDE, CODING, DATA BASES, DIGITAL SYSTEMS, LOW RATE, MULTIPLE ACCESS, NOISE, PERFORMANCE(ENGINEERING), THESES

Subject Categories : Radio Communications

Distribution Statement : APPROVED FOR PUBLIC RELEASE