Abstract:

For the problem of ambiguous acquisition of sin-BOC (binary offset carrier) based on time division data modulation (TDDM), a method which is based on correlation function of sub-correlation is proposed. The method is related to each chip of the local TDDM-BOC signal subcarrier by received signals and the local pseudo code which is modulated. According to the correspondence between two correlation functions, an exact unambiguous acquisition algorithm is synthesized, and the principle of the acquisition algorithm is introduced in detail. Theoretical analysis and computer simulations show that the algorithm not only has lower complexity, but also completely eliminates secondary peak. Under the same conditions, its peak energy of the main peak increases by 79.5% than that of the correlation reconstruction algorithm.