Fig. 9

Generation of the preamble header. The upper part of this figure shows the two signals involved in the generation of the preamble, namely the m-seq (upper left plot) and the tone-pip (upper-right plot). In this illustrative example, we present a fragment of an m-seq with codes [0 1 0 0 1 1 1]. The tone-pip is generated as a 1-kHz tone of 5-ms duration with rising and falling flanks of 1 ms each. On the bottom, the plot shows the convolution of both