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Estimation of DS/CDMA Code Length in multipath Channel

عنوان مقاله: Estimation of DS/CDMA Code Length in multipath Channel
شناسه ملی مقاله: CCESI01_430
منتشر شده در اولین مسابقه کنفرانس بین المللی جامع علوم مهندسی در ایران در سال 1395
مشخصات نویسندگان مقاله:

Farid Samsami Khodadad - Faculty of Engineering Modern Technologies, Amol University of Special Modern Technologies, Amol, 4616849767, Iran
Fakhroddin Nazari - Faculty of Engineering Modern Technologies, Amol University of Special Modern Technologies, Amol, 4616849767, Iran

خلاصه مقاله:
This paper deals with the problem of blind multiuser detection in variable processing gain direct-sequence code division multipleaccess(VPGDS-CDMA). Direct-Sequence Spread Spectrum (DSSS)signals are well-known for their low probability of interception. Furthermore, they are usually transmitted below the noise level. Here, the method is based on the fluctuations of autocorrelation estimators. By using the variable spreading length technique, we show an increase of the periodical fluctuations and consequently an average relationship between their peak amplitudes and sequence lengths. A theoretical analysis illustrate that detection possible, even with a very low signal-to-noise ratio (SNR) at the detector input.

کلمات کلیدی:
Asynchronous VPG DS-CDMA, estimation of length of spread code, Second order statistics

صفحه اختصاصی مقاله و دریافت فایل کامل: https://civilica.com/doc/545439/