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Discrete cosine transform in digital subscriber line applications

机译:数字用户线应用中的离散余弦变换

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Multicarrier or multitone modulations (MTM) are efficient techniques for transmission of digital data over a copper wire. Most significant property of MTM is low sensitivity to the narrowband noise. All MTM are accomplished digitally. Due to high complexity, MTM transceivers were implemented at last decade, when suitable processors were manufactured. At present MTM have wide applications in digital subscriber lines (DSL). ANSI T1.413, asymmetric DSL (ADSL) standard and ITU G.992, defines discrete multitone modulation (DMT), known as well as orthogonal frequency division multiplexing (OFDM). We introduce a simple MTM modulation, which we call discrete cosine multitone (DCMT). DCMT possesses two important properties: it is more efficient than DMT, and provides lower complexity of a transceiver.
机译:多载波或多音调调制(MTM)是通过铜线传输数字数据的有效技术。 MTM最重要的特性是对窄带噪声的灵敏度低。所有MTM均以数字方式完成。由于复杂性高,因此在制造合适的处理器的最后十年中实施了MTM收发器。目前,MTM在数字用户线(DSL)中具有广泛的应用。 ANSI T1.413,非对称DSL(ADSL)标准和ITU G.992,定义了离散多音调制(DMT),以及正交频分复用(OFDM)。我们介绍了一种简单的MTM调制,我们将其称为离散余弦多音(DCMT)。 DCMT具有两个重要的特性:它比DMT效率更高,并且收发器的复杂度更低。

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