Reduced size ambiguity and false alarm rates for polar code. User equipment (UE) for polar-coded codewords having a codeword size based on a decoding hypothesis for control information having a specific bit length of a plurality of different bit lengths for the codeword size. Of decoding candidate bit sequences of? The UE may use an error detection code (EDC) algorithm to calculate the EDC value for the payload portion of the decoded candidate bit sequence and may initialize the EDC variable state with at least one non-zero bit value. Also, scrambling or interleaving of bits may be performed before or after polar coding and may be bit length dependent. In the example, the information bits may be bit-reversed before generating the EDC value. In an example, the coded bits may include multiple EDC values to help the UE perform early termination and reduce the false alarm rate.
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