Fig. 3.

: Computing an impulse response from the responses to a pair of Golay complementary sequences. A. An example of two complementary Golay sequences of length 2⁵ = 32 bits. B. The two auto-correlations of Golay codes (bottom two lines) sum to an impulse at the origin. C. Sound recording of a single Golay sequence. D. The responses to each Golay sequence is cross-correlated with its original Golay sequence, producing a single cross-correlation. The two cross correlations are shown by bottom plots. When summed, they form an impulse response (the upper dark line).