Fig. 9From: Early-detection scheme based on sequential tests for low-latency communicationsDistances over time between OFDM signals where codewords have been pre-coded by a Hadamard orthogonal matrix. Number of different symbols in codewords \(\#\mathcal {K} = 1\) represented by the black dashed curve; number of different symbols in codewords \(\#\mathcal {K} = 2\) represented by colored curvesBack to article page