Title :
Robust detection in DS-CDMA
Author :
Deliç, Hakan ; Hocanin, Aykut
Author_Institution :
Dept. of Electr. & Electron. Eng., Bogazici Univ., Istanbul, Turkey
fDate :
1/1/2002 12:00:00 AM
Abstract :
Robust single-user detection is employed in a direct sequence code-division multiple-access (DS-CDMA) system in which the noise process contains impulsive components. The breakdown point is computed for a mixture noise model. The bit error probability expressions are derived under a Gaussian mixture. The performance is also evaluated in the presence of power imbalance and asynchronous reception. Noise, rather than interference, is shown to be the primary obstacle in achieving good performance for certain practical signal power and user load levels. It is concluded that DS-CDMA employing a robust correlator receiver performs better than the conventional matched filter in an impulsive noise environment
Keywords :
Gaussian processes; cellular radio; code division multiple access; error statistics; impulse noise; radio receivers; signal detection; spread spectrum communication; DS-CDMA; Gaussian mixture; asynchronous reception; bit error probability expressions; breakdown point; direct sequence code-division multiple-access system; impulsive components; impulsive noise environment; mixture noise model; noise process; power imbalance; robust correlator receiver; robust detection; signal power; single-user detection; user load levels; Correlators; Electric breakdown; Error probability; Interference; Matched filters; Multiaccess communication; Noise level; Noise robustness; Power system modeling; Working environment noise;
Journal_Title :
Vehicular Technology, IEEE Transactions on
