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We propose a low-complexity frequency synchronization approach for semi-blind independent component analysis (ICA) based coordinated multi-point (CoMP) orthogonal frequency division multiplexing (OFDM) systems, with multiple carrier frequency offsets (CFOs). The key idea is to introduce a short pilot for both multi-CFO estimation and ambiguity elimination in the ICA equalized signals. First, by minimizing...
We propose a joint semi-blind equalization and inter-carrier interference (ICI) mitigation scheme for multiple carrier frequency offsets (CFOs) corrupted signals in carrier aggregation (CA) based multiple access coordinated multi-point (CoMP) systems with OFDMA. The CFO-induced ICI is mitigated implicitly via the independent component analysis (ICA) based semi-blind equalization, without requiring...
We propose a low-complexity carrier frequency offset (CFO) estimation method and an independent component analysis (ICA) based semi-blind equalization structure for multiuser and coordinated multi-point (CoMP) OFDM systems. A group of orthogonal sequences is employed to enable separation and simultaneous estimation of multiple CFOs, dividing the multi-dimensional search into series of low-complexity...
An asymmetric resource allocation (ARA) scheme for the downlink wireless multi-destination relay systems with orthogonal frequency division multiplexing (OFDM) modulation is proposed. Unlike the previous work, the transmission durations at the source (base station) and the relay are designed to be asymmetric, which enhances the degree of freedom for transmission. Therefore, the proposed ARA scheme...
We propose an asymmetric resource allocation (ARA) scheme for the downlink wireless multidestination relay systems with orthogonal frequency-division multiplexing modulation. Unlike the previous work, the transmission durations at the source (base station) and the relay are designed to be asymmetric, which enhances the degree of freedom for transmission. Therefore, the proposed ARA scheme achieves...
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