JPS5676071A - Phase correction circuit - Google Patents
Phase correction circuitInfo
- 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
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
Landscapes
- Engineering & Computer Science (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Computer Networks & Wireless Communication (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Filters And Equalizers (AREA)
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.
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) |
-
1979
- 1979-11-27 JP JP15311579A patent/JPS5676071A/en active Pending
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