Abstract
This letter first investigates the effects of inter-frame interference (IFI) on the recent eigendecomposition-precoded (EVD) non-orthogonal frequency-division multiplexing (NOFDM) transmission scheme, where subcarrier spacing is set smaller than that of orthogonal frequency-division multiplexing (OFDM). More specifically, the system model of EVD-NOFDM is generalized to support multi-frame transmission, and we propose an optimal power allocation for the multi-frame EVD-NOFDM architecture. The NOFDM scheme's information rate bound is derived and evaluated by our theoretical analysis by assuming the presence of IFI, whereas most previous NOFDM studies ignored IFI effects. Our performance results demonstrate that the proposed multi-frame NOFDM scheme eliminates the detrimental IFI effects while attaining its specific benefits of bandwidth efficiency.
Highlights
I NTRODUCING non-orthogonality into multicarrier transmission has been extensively investigated to improve the achievable performance of orthogonal frequency-division multiplexing (OFDM) [1]
In order to support a scenario with high inter-carrier interference (ICI) and interframe interference (IFI), we introduce the concept of truncated power allocation to the proposed scheme
This section analyzes the information rates of the proposed multi-frame EVD-non-orthogonal frequency-division multiplexing (NOFDM) scheme with truncated power allocation, which are compared with the benchmark schemes, i.e., the EVD-NOFDM without power allocation, the conventional filter-bank multicarrier (FBMC), and the classical OFDM
Summary
I NTRODUCING non-orthogonality into multicarrier transmission has been extensively investigated to improve the achievable performance of orthogonal frequency-division multiplexing (OFDM) [1]. In this paper, such frequencydomain non-orthogonal resource allocation is referred to as non-orthogonal frequency-division multiplexing (NOFDM). The system model of the EVD-NOFDM scheme with power allocation is generalized to support multiframe transmission to consider the effects of IFI. In order to support a scenario with high ICI and IFI, we introduce the concept of truncated power allocation to the proposed scheme.
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