Impulse noise suppression and demapping soft decision method and system in multi-carrier system
A technology of multi-carrier system and impulse noise, applied in the field of digital information transmission, can solve the problems such as the reduction of signal reliability, and achieve the effect of simple structure, suppression of impulse noise, and easy realization.
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[0030] to combine figure 2 and image 3 Shown, the present invention comprises following implementation steps:
[0031] Step S1: The input signal of the multi-carrier system enters the A / D conversion module, and the power statistics module calculates the power or amplitude of the input signal (referred to as the received signal) received by the A / D conversion module.
[0032] Step S2: The power statistics module compares the obtained signal power or amplitude with the set threshold to determine whether there is impulse noise in the received signal.
[0033] In the presence of impulse noise, the received time-domain signal r k It can be expressed as:
[0034] r k = Σ l = 1 L h l s k - l + w ...
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