Title :
A new rapid acquisition scheme for burst mode DS spread spectrum packet radio
Author :
Driessen, P.F. ; Shi, Z.L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Victoria Univ., BC, Canada
Abstract :
A rapid acquisition scheme for direct-sequence (DS) spread-spectrum packet radio systems using PN matched filters is described. The system operates in burst mode, with limited permitted time for synchronization using a fixed length preamble at the beginning of each data burst. Multiple PN codes are available for acquisition at the first portion of the preamble. The second portion of the preamble consists of several PN codes which are modulated with a marker. The receiver may achieve code acquisition anywhere within the first portion of the preamble. Since it is not known a priori in which of the several code periods acquisition will occur, coincidence detection is done using the marker for frame synchronization. The analysis shows that the scheme yields better performance than some other previous schemes in packet radio systems
Keywords :
codes; matched filters; packet switching; spread spectrum communication; PN codes; PN matched filters; burst mode DS spread spectrum; code acquisition; coincidence detection; fixed length preamble; frame synchronization; packet radio systems; rapid acquisition scheme; receiver; Matched filters; Modulation coding; Packet radio networks; Performance analysis; Receivers; Spread spectrum communication; Surface acoustic wave devices; System performance; Throughput; Time measurement;
Conference_Titel :
Military Communications Conference, 1991. MILCOM '91, Conference Record, Military Communications in a Changing World., IEEE
Conference_Location :
McLean, VA
Print_ISBN :
0-87942-691-8
DOI :
10.1109/MILCOM.1991.258373
