Title :
PN code acquisition using signed-rank-based nonparametric detectors in DS/SS systems
Author :
Kim, Hong Gil ; Song, Iickho ; Yoon, Seokho ; Kim, Sun Yong
Author_Institution :
Dept. of Electr. Eng., Korea Adv. Inst. of Sci. & Technol., Daejeon, South Korea
fDate :
7/1/2001 12:00:00 AM
Abstract :
In this paper, signed-rank based nonparametric detectors are used for pseudonoise (PN) code acquisition in direct-sequence spread-spectrum (DS/SS) systems. We first derive the locally optimum rank (LOR) detector and then propose the locally suboptimum rank (LSR) and modified signed-rank (MSR) detectors using approximate score functions. We compare the single-dwell scheme without the verification mode using the proposed LSR and MSR detectors with that using the conventional squared-sum (SS) and modified sign (MS) detectors. From the simulation results, it is shown that the proposed LSR and MSR detectors perform better than the MS detector by about 2-3 dB and are nearly optimum
Keywords :
demodulators; function approximation; optimisation; pseudonoise codes; signal detection; spread spectrum communication; synchronisation; BPSK demodulator; DS/SS systems; LSR detector; MS detector; MSR detector; PN code acquisition; approximate score functions; locally optimum rank detector; locally suboptimum rank detector; modified sign detector; modified signed-rank detector; pseudonoise code acquisition; signed-rank-based nonparametric detectors; simulation results; single-dwell scheme; squared-sum detector; AWGN; Delay effects; Detectors; Gas insulated transmission lines; Interference; Spread spectrum communication; Statistics; Sun; Tracking loops; Transmitters;
Journal_Title :
Vehicular Technology, IEEE Transactions on
