Investigating the relation between optimum guard interval and channel delay spread for a MC-CDMA system

Çetin KURNAZ; Hülya GÖKALP

Makale detayları

Investigating the relation between optimum guard interval and channel delay spread for a MC-CDMA system

Yazarlar:

Çetin KURNAZ | Hülya GÖKALP

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Electrical Engineering and Computer Science 2012 Vol.20 Issue 3, pp.439-452

Belge Tipi:

Makale

Yayın Tarihi:

2/2012

Belge Dili:

Türkçe

Document ID (Org No.):

2000743603

Sıklık:

İki Aylık

eISSN:

1303-6203

pISSN:

1300-0632

Özet:

 

This paper demonstrates a novel approach to determining the  optimum guard interval for a multicarrier code division multiple  access (MC-CDMA) system.  Analytical expressions for useful and  interference power are derived as a basis for comparison.  From these,  an expression for the signal-to-noise ratio of a detected bit is  derived and used to determine the optimum guard interval for a given  channel profile and system parameters.  In contrast to other works, we  use channel models based on actual measurements and we highlight  important differences from theoretical models to support our approach.  From our results, we propose an empirical rule for optimum guard  intervals given prevailing channel parameters.  We show that the  optimum guard interval can be selected as the delay window that  includes 95% and 99% multipath power for Es/N0 = 10 dB and  Es/N0 = 20 dB, respectively.  In our case, the optimum guard  interval was between 2 trms and 4 trms for Es/N0 = 10  dB and between 3 trms and 6.4 trms for Es/N0 = 20 dB.

 

This paper demonstrates a novel approach to determining the  optimum guard interval for a multicarrier code division multiple  access (MC-CDMA) system.  Analytical expressions for useful and  interference power are derived as a basis for comparison.  From these,  an expression for the signal-to-noise ratio of a detected bit is  derived and used to determine the optimum guard interval for a given  channel profile and system parameters.  In contrast to other works, we  use channel models based on actual measurements and we highlight  important differences from theoretical models to support our approach.  From our results, we propose an empirical rule for optimum guard  intervals given prevailing channel parameters.  We show that the  optimum guard interval can be selected as the delay window that  includes 95% and 99% multipath power for Es/N0 = 10 dB and  Es/N0 = 20 dB, respectively.  In our case, the optimum guard  interval was between 2 trms and 4 trms for Es/N0 = 10  dB and between 3 trms and 6.4 trms for Es/N0 = 20 dB.

Makale detayları

Investigating the relation between optimum guard interval and channel delay spread for a MC-CDMA system

Yazarlar: Çetin KURNAZ | Hülya GÖKALP

Yayıncı: TUBITAK

Dergi: Turkish Journal of Electrical Engineering and Computer Science 2012 Vol.20 Issue 3, pp.439-452

Belge Tipi: Makale

Yayın Tarihi: 2/2012

Belge Dili: Türkçe

Document ID (Org No.): 2000743603

Sıklık: İki Aylık

eISSN: 1303-6203

pISSN: 1300-0632

Sayı

Yazarlar:

Çetin KURNAZ | Hülya GÖKALP

Yayıncı:

TUBITAK

Dergi:

Turkish Journal of Electrical Engineering and Computer Science 2012 Vol.20 Issue 3, pp.439-452

Belge Tipi:

Makale

Yayın Tarihi:

2/2012

Belge Dili:

Türkçe

Document ID (Org No.):

2000743603

Sıklık:

İki Aylık

eISSN:

1303-6203

pISSN:

1300-0632