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This paper proposes an approach that devises a new hybrid technique, which is a combination of Maximum likelihood estimation (MLE) and self cancellation (SC) techniques through wavelet implication, to enhance BER performance of the OFDM system.
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Self-cancellation: A simple and effective method known as the ICI self-cancelation scheme was proposed by Zhao and Haggman in [18] and later generalized in [15, 19], where polynomial coding in the frequency domain is used to mitigate the effect of frequency offset.
A large range of coding techniques has been developed in recent years and can be classified as follows (see Table 1): Self-cancellation: A simple and effective method known as the ICI self-cancelation scheme was proposed by Zhao and Haggman in [18] and later generalized in [15, 19], where polynomial coding in the frequency domain is used to mitigate the effect of frequency offset.
Read closely, the speech is a kind of spiraling black hole of self-cancellation.
Self-cancellation is something of a motif – they sing about it on There Is a Glace Over My Eyes – but so is death in general: their 2012 debut single was called Killing Everyone You Know.
The comparator overshoot due to comparator delay is minimized by a self-cancellation scheme.
An interesting combination of correlative-coding and self-cancellation was proposed in [39].
An ICI self-cancellation scheme [9] is a technique where a number of redundant data is transmitted onto adjacent subcarriers.
However, unlike ICI self-cancellation method, two-path transmission method transmits the data copies in two concatenated OFDM blocks.
This results in a certain level of self-cancellation of the phase noise upon downconversion, considerably reducing its significance [44].
Two-path transmission: The two-path transmission method halves the spectral efficiency similar to ICI self-cancellation techniques in [18].
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