Which bottleneck presents itself when Channel Estimation processing struggles within a MIMO-OFDM reciever operating in rapidly fading wireless networks?

💡 Explanation

Poor BER arises because channel estimation uses pilots for calculating channel state; if doppler effects are egregious, Pilots will not be tracked by the `least squares estimation` algorithm, therefore, inaccurate channel information harms signal demodulation rather than increasing ISI.

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