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It consists of three main fields: the PREAMBLE training field, the SIGNAL field, and the DATA field (see Figure 1).
The channel estimation of MB-OFDM UWB systems can be performed by either adopting preamble training sequence or inserting pilot signals into each OFDM symbol.
To the best of the authors' investigation, a preamble training sequence (TS) is often used to estimate the channel impulse response in digital communication systems (as seen in Figure2).
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Different from the established algorithms, LVD-EDE does not depend on specific preamble or training sequence.
To combat multipath delay and Doppler shifts in vehicular environments, the preamble long training sequence is inserted at a predetermined symbol duration throughout the frame, also referred to as midamble data-aided channel tracking [29].
LMS algorithms for FRESH filters such as [10, 11] can be incorporated to adapt the filter weights using preambles for training or blind adaptation [30], such as decision-directed training or property restoration, and whose performance can be measured against the MMSE filter weights derived here.
It is hardly the way to cover a team, but then nothing about this spring training preamble quite makes sense.
The short training (preamble) remains the same as the one in Figure 4.
In this paper, a training preamble of length K t is assumed.
The short training (preamble) consists of 10 cycles of a periodic signal.
However, extending the method to use pilot symbols instead of, or in addition to, a training preamble is straightforward.
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