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- W2342202954 abstract "The use of active narrowband interference (NBI) suppression in direct-sequence spread-spectrum (DS-SS) communications has been extensively studied. In this paper, we address the problem of optimum coding–spreading tradeoff for NBI suppression. With maximum-likelihood (ML) decoding, we first derive upper bounds on the error probability of coded systems in the presence of a special class of NBI, namely, multitone interference with orthogonal signatures. By employing the well-developed bounding techniques, we show that there is no advantage in spreading, and hence, a low-rate full-coding approach is always preferred. Then, we propose a practical low-rate turbo-Hadamard coding approach, in which NBI suppression is naturally achieved through iterative decoding. The proposed turbo-Hadamard coding approach employs a kind of coded spread-spectrum signaling with time-varying spreading sequences, which is sharply compared with the code-aided DS-SS approach. With a spreading sequence of length 32 and a fixed bandwidth allocated for both approaches, it is shown through extensive simulations that the proposed turbo-Hadamard coding approach outperforms the code-aided DS-SS approach for three types of NBI, even when its transmission information rate is about five times higher than that of the code-aided DS-SS approach. The use of the proposed turbo-Hadmard coding approach in multipath fading channels is also discussed." @default.
- W2342202954 created "2016-06-24" @default.
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- W2342202954 date "2016-04-01" @default.
- W2342202954 modified "2023-10-17" @default.
- W2342202954 title "Coding Versus Spreading for Narrowband Interference Suppression" @default.
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- W2342202954 doi "https://doi.org/10.1109/tvt.2015.2425539" @default.
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