Performance analysis of a second order delay-lock loop with application to a CDMA system with multipath propagation
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Cita com:
hdl:2117/100704
Tipus de documentText en actes de congrés
Data publicació1992
Editor. IEEE
Condicions d'accésAccés obert
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Abstract
CDMA systems require synchronization between the received sequence and the locally generated sequence. This is done by means of a delay-lock loop (DLL). The differential equation of an incoherent second-order DLL has been programmed. The mean time to lose lock (MTLL) of the DLL is a very important design parameter. The authors have obtained this parameter by computer simulation and are able to plot the MTLL as a function of the signal to noise ratio in the data bandwidth. In a narrow-band system, the simulation shows that the effect of the fast Rayleigh fading is a performance degradation even with high mean signal to noise ratio. Assuming a wide-band system, so that the receiver has enough bandwidth to resolve the different propagation paths, the authors propose a modified DLL scheme. The MTLL of the proposed DLL is evaluated using a dynamic simulation of the multipath channel. The results show an improvement with respect to the conventional DLL.
CitacióOlmos, J., Agusti, R. Performance analysis of a second order delay-lock loop with application to a CDMA system with multipath propagation. A: ICUPC'92. "?". . IEEE, 1992, p. 209-213.
ISBN7803-591-4
Versió de l'editorhttp://ieeexplore.ieee.org/document/240771/
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