| 摘要 |
PROBLEM TO BE SOLVED: To provide a synchronized tracking device for the spread spectrum receiver detecting a phase shift direction. SOLUTION: A signal obtained by multiplying a pseudo noise code from a reception use pseudo noise code generator 33 with a reception signal is distributed to information interleave circuits 25, 26 respectively and the received signal is interleaved respectively by a timing signal fed to input terminals 23, 34. Then the interleaved signals are integrated by integration devices 27, 28 to generate different correlation characteristic on the same time base and an adder 31 is used to subject them with each other thereby synthesizing the characteristics and obtaining a delay discrimination characteristic. Based on the characteristic, the pseudo noise code generator 33 is controlled to vary the frequency of the pseudo noise code so as to trace reception synchronization. |
