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In this paper, the superimposed training strategy is introduced into the OFDM modulated amplify-and-forward (AF) two-way relay network (TWRN) to simplify the channel estimation at the destination, and the closed-form Bayesian Cramér-Rao lower bound (CRLB) is derived for the estimation of block-fading frequency-selective channels, which is used to guide the optimal training design. Through the superposition...
Adaptive Modulation and Coding (AMC) is one of the most promising techniques to cope with the dynamic fading of wireless channels, adopted by emerging standards such as LTE and WiMAX. In satellite communications, the upper bound of AMC adjustment period is determined by both long round-trip delay and different channel coherence time. In this paper, the impact of AMC adjustment period in mobile satellite...
We propose in this paper a non-cyclic prefixed multiple-input multiple-output orthogonal frequency division multiplexing (non-cp MIMO-OFDM) system based on a recursive algorithm of joint channel estimation and data detection. Unlike in the traditional cyclic prefixed MIMO-OFDM system, the transmitted sequence of the proposed system is given in the way that block-type pilot sequences and OFDM symbols...
This paper presents two novel channel estimation algorithms for block transmission systems with two transmit antennas over frequency-selective fading channels: time-domain-processing-based algorithm (TDPBA) and frequency-domain-processing-based algorithm (FDPBA). Performance analysis of the two novel algorithms and simulation results show that both can achieve good channel estimation performance at...
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