Lock-in circuit for absolute phase synchronization

摘要

A small-scale absolute-phasing synchronization capturing circuit for absolute phasing of a received signal by selectively transmitting a baseband signal demodulated through a demodulator (1), a baseband signal subjected to phase rotation through a remapper (11), a baseband signal outputted from a first inverting means, and a baseband signal outputted from a second inverting means based on the phase angle of the received signal relative to the phase of the transmission signal. The most significant bit in the demodulated baseband signal and the most significant bit in the baseband signal subjected to phase rotation through the remapper (11) are extracted and a frame synchronization signal is captured according to the extracted significant bit.