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- W2016166923 abstract "Time-domain channel shortening filters (CSFs) are used in orthogonal frequency division multiplexing (OFDM) systems to increase the spectral efficiency. We consider transmit-side CSF to reduce the cyclic prefix (CP) length required for the OFDM symbol. We first construct a simple CSF scheme which, however, has a poorer spectral efficiency (SE) when compared to a system with adequate CP length (which we refer to as a full-CP system). We then propose a modified CSF (MCSF) structure that exploits the null-space of an under-determined system of equations, and provides independent equivalent channels to the receiver. The SE of the MCSF is shown to be generally higher than the full-CP system when the chosen CP length is significantly smaller than the channel delay spread. Simulated BLER performance for turbo-coded multi-antenna OFDM systems reveals that the MCSF can provide up to 2 dB gain in <formula formulatype=inline xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink> <tex Notation=TeX>${{bf E}_{bf b}}/{{bf N}_{bf 0}}$</tex></formula> when compared with the full-CP system for the same transmit information rate." @default.
- W2016166923 created "2016-06-24" @default.
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- W2016166923 date "2014-06-01" @default.
- W2016166923 modified "2023-09-23" @default.
- W2016166923 title "Enhancement in Spectral Efficiency using Transmit-side Channel Shortener for MISO-OFDM Systems" @default.
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- W2016166923 doi "https://doi.org/10.1109/lsp.2014.2313885" @default.
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