Title :
A New Adaptive Code-Acquisition Algorithm Using Parallel Subfilter Structure
Author :
Han, Myeongsu ; Yu, Takki ; Kang, Changeon ; Hong, Daesik
Author_Institution :
Dept. of Electr. & Electron. Eng., Yonsei Univ., Seoul
Abstract :
This paper presents a new adaptation algorithm using parallel subfilter structure, which enables fast-code acquisition for direct-sequence spread-spectrum systems. The proposed algorithm adapts the filter, based on a concept of dividing it into several subfilters, thus reducing the adaptation time. The detection and false-alarm probabilities are derived analytically. Simulation results show that the adaptive code-acquisition scheme, using the proposed algorithm, improves the mean-acquisition-time performance by 4-5 and 3-4 dB on additive white Gaussian noise and multipath Rayleigh fading channels for 64 taps, respectively
Keywords :
AWGN channels; Rayleigh channels; adaptive filters; adaptive signal detection; code division multiple access; multipath channels; probability; spread spectrum communication; adaptive code-acquisition algorithm; additive white Gaussian noise channel; detection probability; direct-sequence spread-spectrum system; false-alarm probability; multipath Rayleigh fading channel; parallel subfilter structure; Adaptive filters; Additive white noise; Algorithm design and analysis; Fading; Information technology; Interference; Matched filters; Performance gain; Spread spectrum communication; Uncertainty; Adaptive filter; code acquisition; direct-sequence spread-spectrum (DS/SS) systems;
Journal_Title :
Vehicular Technology, IEEE Transactions on
DOI :
10.1109/TVT.2006.883781
