Reliable signal acquisition with low computational complexity is an important design objective for the evolution of global navigation satellite systems (GNSS). Most GNSS signals consist long pseudorandom noise (PRN) codes whose expensive in terms memory, computation time, and energy. As these resources are particularly scarce emerging mass-market user segment, cyclostationary pilot short PRN ...

This study attempted to investigate the impact of teacher’s code-switching on the acquisition of a problematic grammatical structure, namely, object relative clauses, by intermediate EFL learners. Moreover, a secondary objective of the study was to determine the EFL learners’ attitudes and opinions regarding the effectiveness of teacher’s code-switching in their learning of a specific aspect of...

A maximum a posteriori probability (MAP) code acquisition scheme is proposed which utilizes all the available information by exploiting stochastic properties of spreading codes. Application of this method shows: i) code acquistion superiority of Bologna codes (Markov codes having eigenvalue of the transition probability matrix λ = √ 3 − 2) over independent and identically distributed (i.i.d.) c...

Under the high dynamic conditions, Global Navigation Satellite System (GNSS) signals produce great Doppler frequency shifts, which hinders the fast acquisition of signals. Inertial Navigation System (INS)-aided acquisition can improve the acquisition performance, whereas the accuracy of Doppler shift and code phase estimation are mainly determined by the INS precision. The relation between the ...

In this paper, a new PRN code optimal design based on unequal-length code modulation is proposed. The better performance of code acquisition in weak signals will be achieved by using this method, because the crosscorrelations between different signals have been sliding, thus suppressing multiple access interference effectively. Theoretical analysis and simulation show that this design has predi...