A quick acquisition method with respect to the delay of M-sequences subclass

A problem of fast acquisition of broadband signals based on big length code sequences is considered. The problem arises when solving tasks of reliable synchronization and commands transmission, ensuring high-precision measurements of the delay and Doppler shift with a limited observation time of the signal [3, 8]. Various options are offered to the following main methods: series-parallel acquisition scheme using the FFT [35]; sequential decision-making algorithms by partial sequence [1, 6]; separate processing of the combined sequence components [2, 7]. This effect is achieved at the cost of lower energy efficiency, or at the cost of more system implementation complexity.

The paper proposes a method for fast acquisition of a subclass of M-sequence based on the use of rapid conversion in Galois fields, utilizing all the energy of the signal. The method can be recommended for use in async-targeted and control-measurement aerospace systems using complex coded signals.