Capacity of DS-CDMA versus TH-PPM for multi-user ultra-wideband systems
2006 IEEE 17th International Symposium on Personal, Indoor and Mobile Radio Communications, PIMRC, Helsinki, Finlandiya, 11 - 14 Eylül 2006, (Tam Metin Bildiri)
- Yayın Türü: Bildiri / Tam Metin Bildiri
- Doi Numarası: 10.1109/pimrc.2006.254420
- Basıldığı Şehir: Helsinki
- Basıldığı Ülke: Finlandiya
- Anahtar Kelimeler: DS-CDMA, FCC, Gaussian pulse, Information capacity, Multiple-access, TH-PPM, Ultra wideband communications (UWB)
- Boğaziçi Üniversitesi Adresli: Evet
Özet
This paper focuses on the channel capacity of Direct Sequence Code Division Multiple Access (DS-CDMA) and Time-Hopping Pulse Position Modulation (TH-PPM) for Ultra-Wide Band (UWB) communication systems over multiple-access and additive white Gaussian noise (AWGN) channel. Based on Gaussian approximation for the multiple access interference, an expression of the signal-to-noise ratio is derived for the UWB system using 2nd derivative Gaussian pulse. The information theoretic capacity of the UWB system is expressed as a function of system parameters. Analytical and simulation results show that the capacity of DS/CDMA outperform the capacity of TH-PPM UWB system for high demand environment.