A method (700) and apparatus (600) are described for performing parallel decoding in connection with 2M-1 parallel ACS unit in ACS unit (110), track buffer (112) and voting unit (114) in an Ultrawide Bandwidth (UWB) receiver having a parallel trellis decoder for decoding a message sequence encoded according to a convolutional code. Outputs from the track buffer can be input to a voting unit (114) where a voting scheme can be applied and a decision rendered as to the originally transmitted message sequence.