JPH01121880U - - Google Patents
Info
- Publication number
- JPH01121880U JPH01121880U JP1683588U JP1683588U JPH01121880U JP H01121880 U JPH01121880 U JP H01121880U JP 1683588 U JP1683588 U JP 1683588U JP 1683588 U JP1683588 U JP 1683588U JP H01121880 U JPH01121880 U JP H01121880U
- Authority
- JP
- Japan
- Prior art keywords
- signal output
- amplifier
- correlator
- code
- demodulator
- 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
- 238000001228 spectrum Methods 0.000 claims description 4
- 238000001514 detection method Methods 0.000 claims description 3
- 238000010586 diagram Methods 0.000 description 5
Landscapes
- Position Fixing By Use Of Radio Waves (AREA)
Description
第１図は本発明の実施例のスペクトル拡散受信
機のブロツク図、第２図は制御回路のブロツク図
、第３図は衛星切換え時の制御ルーチンを示す流
れ図、第４図及び第５図は利得信号Ａ′ｎ算出処
理ルーチンを示す流れ図、第６図はステツプ数と
利得の関係を示す図、第７図は検出レベルと利得
の関係を示す図、第８図は従来のスペクトル拡散
受信機のブロツク図である。
２０……相関器、２２……復調器、２６……制
御回路、５４……ＣＰＵ、５８……レンジカウン
ト値検出回路。
Fig. 1 is a block diagram of a spread spectrum receiver according to an embodiment of the present invention, Fig. 2 is a block diagram of a control circuit, Fig. 3 is a flowchart showing a control routine when switching satellites, and Figs. 4 and 5 are A flowchart showing the gain signal A'n calculation processing routine, FIG. 6 is a diagram showing the relationship between the number of steps and gain, FIG. 7 is a diagram showing the relationship between detection level and gain, and FIG. 8 is a diagram showing a conventional spread spectrum receiver. FIG. 20... Correlator, 22... Demodulator, 26... Control circuit, 54... CPU, 58... Range count value detection circuit.
Claims (1)
て衛星から送信されたスペクトル拡散電波を増幅
する増幅器と、前記増幅器から出力された信号の
ＰＮ符号の同期をとる相関器と、前記ＰＮ符号に
基づき衛星との距離を算出するためのレンジカウ
ント値を検出するレンジカウント値検出手段と、
前記相関器から出力された信号を復調して衛星の
軌道情報を示すアルマナツクデータを再生する復
調器と、レンジカウント値が必要なときに前記相
関器から出力された信号に基づいて前記増幅器の
利得制御を行いアルマナツクデータが必要なとき
に前記復調器から出力された信号に基づいて前記
増幅器の利得制御を行なう自動利得制御回路と、
を有するスペクトル拡散受信機。 an amplifier that amplifies the spread spectrum radio wave modulated by the baseband signal and the PN code and transmitted from the satellite; a correlator that synchronizes the PN code of the signal output from the amplifier; and a correlator that synchronizes the PN code of the signal output from the amplifier; Range count value detection means for detecting a range count value for calculating distance;
a demodulator that demodulates the signal output from the correlator and reproduces almanac data indicating orbit information of the satellite; an automatic gain control circuit that performs gain control of the amplifier based on a signal output from the demodulator when almanac data is required;
Spread spectrum receiver with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1683588U JPH01121880U (en) | 1988-02-10 | 1988-02-10 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1683588U JPH01121880U (en) | 1988-02-10 | 1988-02-10 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH01121880U true JPH01121880U (en) | 1989-08-18 |
Family
ID=31230107
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1683588U Pending JPH01121880U (en) | 1988-02-10 | 1988-02-10 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH01121880U (en) |
-
1988
- 1988-02-10 JP JP1683588U patent/JPH01121880U/ja active Pending
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