Industrial Automatic Control Systems and Controllers Annotation << Back Search and Sync in Broadband System with Direct Spectrum Expansion and Modified QPSK with Shift A.N. Rudnev The principle of synchronization of the receiving device of the system with direct spread of the spectrum and modified QPSK with a shift (SQPSK -4) [1,2] is proposed. Abstract-digital processing of DSSS in the intermediate frequency (IF) path of a super-heterodyne radio receiver (RR) is considered. A block diagram of a system has been developed, in which the problem of determining the parameters of received signals (delay, clock frequency) and generating reference signals, the parameters of which are uniquely related to the parameters of the received DSSS, is solved. The software modeling of the digital processing system of the DSSS in the environment of software simulation modeling SystemView has been carried out. Keywords: digital signal processing; ADC; DSSS; PNS generator; PLL; delay monitoring. DOI: 10.25791/asu.4.2023.1430 Pp. 08-11.