Title :
A novel channel estimator for a superposition-based cooperative system
Author :
Yu Gong ; Zhiguo Ding ; Ratnarajah, T. ; Cowan, Colin F. N.
Author_Institution :
Inst. of Electron., Queen´s Univ. of Belfast, Belfast, UK
Abstract :
This paper investigates channel estimation and equalization for the relay node of a cooperative diversity system based on superposition modulation. Exploring the superposition structure of the transmission data, we propose a novel channel estimator for the relay node. Without any pilot sequence, the proposed estimator can converge to the ideal case as if the transmission data is known to the receiver. We also re-derive the soft-input-soft-output MMSE equalizer to match the superimposed data structure of the cooperative scheme. Finally computer simulation results are given to verify the proposed algorithm.
Keywords :
channel estimation; cooperative communication; diversity reception; least mean squares methods; modulation; relay networks (telecommunication); MMSE equalizer; channel equalization; channel estimation; channel estimator; computer simulation; cooperative diversity system; relay node; superposition modulation; superposition-based cooperative system; Abstracts; Fading; Signal to noise ratio;
Conference_Titel :
Signal Processing Conference, 2006 14th European
Conference_Location :
Florence
