Converts the received complex symbols \(\hat{a}[k]\) into decimal symbol decisions \(\hat{s}[k]\) using maximum-likelihood estimation (MLE).

Parameters:¶

a_hat: ArrayLike¶

The received complex symbols \(\hat{a}[k]\).

Returns:¶

The decimal symbol decisions \(\hat{s}[k]\), \(0\) to \(M-1\).