Title :
Performance study of BFAM 2D-RLS channel estimator for AOFDM based two-way relay
Author :
Joy, Arun ; Chakka, Vijay Kumar
Author_Institution :
Albertian Inst. of Sci. & Technol., Kochi, India
Abstract :
In this paper we introduce an adaptive channel estimation scheme for two-way relay with node capability. The adaptive filter used is called Block Fast Array Multichannel 2D-Recursive Least Square (BFAM 2D-RLS). The modulation used is Orthogonal Frequency Division Multiplexing (OFDM) and channel estimation is done in the frequency domain. The proposed channel estimator considers correlation of channel frequency response in both time and frequency domain. The computational complexity is calculated and convergence performance of the adaptive channel estimator is studied. This paper also introduces an AOFDM scheme for two-way relay systems. The effect of channel estimation error on performance of Adaptive OFDM (AOFDM) is analyzed for pedestrian A (pedA) channel. All computer simulations are performed using MATLAB ®.
Keywords :
OFDM modulation; adaptive filters; adaptive modulation; channel estimation; computational complexity; correlation methods; frequency response; frequency-domain analysis; relay networks (telecommunication); time-domain analysis; AOFDM scheme; BFAM 2D-RLS channel estimator; MATLAB; adaptive channel estimation scheme; adaptive filter; block fast array multichannel 2D-recursive least square; channel frequency response; computational complexity; computer simulations; convergence performance; correlation; frequency domain; node capability; orthogonal frequency division multiplexing; pedA channel; pedestrian A channel; time domain; two-way relay; Channel estimation; Frequency response; Interference; OFDM; Relays; Signal to noise ratio; Vectors;
Conference_Titel :
Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT), 2014 6th International Congress on
Conference_Location :
St. Petersburg
DOI :
10.1109/ICUMT.2014.7002077
