JPS5676071A - Phase correction circuit - Google Patents

Phase correction circuit

Info

Publication number
JPS5676071A
JPS5676071A JP15311579A JP15311579A JPS5676071A JP S5676071 A JPS5676071 A JP S5676071A JP 15311579 A JP15311579 A JP 15311579A JP 15311579 A JP15311579 A JP 15311579A JP S5676071 A JPS5676071 A JP S5676071A
Authority
JP
Japan
Prior art keywords
phase
filter
correction
phase correction
circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP15311579A
Other languages
Japanese (ja)
Inventor
Kiyoshi Kawai
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujitsu Ltd
Original Assignee
Fujitsu Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Fujitsu Ltd filed Critical Fujitsu Ltd
Priority to JP15311579A priority Critical patent/JPS5676071A/en
Publication of JPS5676071A publication Critical patent/JPS5676071A/en
Pending legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
    • G01S13/00—Systems using the reflection or reradiation of radio waves, e.g. radar systems; Analogous systems using reflection or reradiation of waves whose nature or wavelength is irrelevant or unspecified
    • G01S13/74—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems
    • G01S13/82—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein continuous-type signals are transmitted
    • G01S13/84—Systems using reradiation of radio waves, e.g. secondary radar systems; Analogous systems wherein continuous-type signals are transmitted for distance determination by phase measurement

Abstract

PURPOSE:To perform correctly a phase correction even when a filter having a having a high Q is used by a method wherein an output of a PL loop of an input signal passing through a filter is digitally counted, and correction is performed for a phase and temperature by means of a digital phase correction circuit and the signal is passed through a waveform shaping filter to be converted into a sine wave. CONSTITUTION:A detection input which is transmitted from a base station and received at a traveling communication teminal receiver is passed through a filter 10 and delivered to a phase locked loop (PLL) 2. A digital output from the PLL 2 enters a digital phase correction circuit 12, and it is counted digitally and by means of a control pulse from a counter 14, a correction for a phase rotation of a filter 1 by means of phase and temperature is performed. The output is converted into a sine wave through a waveform shaping circuit 13 and thereafter, it is modulat ed through a modulation circuit and outputted to the base station. Accordingly, even when a filter 1 having a large phase rotation and large Q value is used, the phase correction can be correctly performed.
JP15311579A 1979-11-27 1979-11-27 Phase correction circuit Pending JPS5676071A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP15311579A JPS5676071A (en) 1979-11-27 1979-11-27 Phase correction circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP15311579A JPS5676071A (en) 1979-11-27 1979-11-27 Phase correction circuit

Publications (1)

Publication Number Publication Date
JPS5676071A true JPS5676071A (en) 1981-06-23

Family

ID=15555291

Family Applications (1)

Application Number Title Priority Date Filing Date
JP15311579A Pending JPS5676071A (en) 1979-11-27 1979-11-27 Phase correction circuit

Country Status (1)

Country Link
JP (1) JPS5676071A (en)

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