The Radar Ambiguity Function - MATLAB Simulations for Radar Systems Design - page 209

compression ratio for the combined B mn code is equal to mn . As an example,

a combined B 54 is given by

B 54 = { 11101 11101 00010 11101 , , , }

(4.49)

and is illustrated in Fig. 4.16. Unfortunately, the sidelobes of a combined
Barker code autocorrelation function are no longer equal to unity.

∆τ

+++++- - ++- + -+

13∆τ = τ'

13

1

13∆τ

1– ∆τ – ∆τ ∆τ

Figure 4.15. Barker code of length 13, and its corresponding
autocorrelation function.

B 4

+ + - +

B 54

+ + + - + + + + - + - - - + - + + + - +

B 54 Figure 4.16. A combined Barker code.