JPS63121932U - - Google Patents
Info
- Publication number
- JPS63121932U JPS63121932U JP1987014032U JP1403287U JPS63121932U JP S63121932 U JPS63121932 U JP S63121932U JP 1987014032 U JP1987014032 U JP 1987014032U JP 1403287 U JP1403287 U JP 1403287U JP S63121932 U JPS63121932 U JP S63121932U
- Authority
- JP
- Japan
- Prior art keywords
- antenna
- received signal
- receiving antenna
- signal level
- threshold level
- 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.)
- Granted
Links
- 230000005684 electric field Effects 0.000 claims 3
- 238000010586 diagram Methods 0.000 description 6
- 238000001514 detection method Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 1
Description
第１図は本考案にかかるダイバーシテイ受信装
置の回路図、第２図はマルチパスノイズ検出部と
切替回路の一部を有する回路ユニツトの構成図、
第３図はステレオ復調回路とセパレーシヨン／ハ
イカツト回路のブロツク図、第４図はスレツシヨ
ールドレベル切替設定回路の動作説明図、第５図
は従来のダイバーシテイ受信装置のブロツク図、
第６図は第５図の動作説明図である。
１ａ，１ｂ……アンテナ、２……フロントエン
ド、３……レベル検出回路、４……比較部、４ｂ
……スレツシヨールドレベル切替設定回路、４ｃ
……コンパレータ、５……雑音除去回路、７ａ…
…マルチパスノイズ検出部、７ｂ……切替回路。
FIG. 1 is a circuit diagram of a diversity receiver according to the present invention, and FIG. 2 is a configuration diagram of a circuit unit having a multipath noise detector and part of a switching circuit.
Fig. 3 is a block diagram of a stereo demodulation circuit and a separation/high cut circuit, Fig. 4 is an explanatory diagram of the operation of a threshold level switching setting circuit, and Fig. 5 is a block diagram of a conventional diversity receiving device.
FIG. 6 is an explanatory diagram of the operation of FIG. 5. 1a, 1b...Antenna, 2...Front end, 3...Level detection circuit, 4...Comparison section, 4b
...Threshold level switching setting circuit, 4c
...Comparator, 5...Noise removal circuit, 7a...
...Multipath noise detection section, 7b...Switching circuit.
Claims (1)
テナを有し、アンテナ入力が所定の電界強度以上
の場合にはマルチパスノイズの増大に応じて使用
する受信アンテナを切り替えると共に、所定の電
界強度以下の弱電界時には受信アンテナを予め定
めた一方のアンテナに固定するダイバーシテイ受
信装置において、 アンテナ出力に応じた受信信号レベルを検出す
るレベル検出手段と、 各受信アンテナ毎に所定のスレツシヨールドレ
ベルを設定されると共に現在選択されている受信
アンテナに応じたスレツシヨールドレベルと受信
信号レベルを比較する比較手段と、 受信信号レベルが現在選択されている受信アン
テナに対応するスレツシヨールドレベル以上の場
合にはマルチパスノイズの増大に応じて受信に用
いる受信アンテナを切り替え、受信信号レベルが
現在選択されている受信アンテナに対応するスレ
ツシヨールドレベルより小さい場合には予め定め
られているメインの受信アンテナを選択する切替
手段とを含むことを特徴とするダイバーシテイ受
信装置。[Claims for Utility Model Registration] A system having at least two receiving antennas that are selectively used, and when the antenna input exceeds a predetermined electric field strength, the receiving antennas to be used are switched according to an increase in multipath noise. , a diversity receiving device that fixes the receiving antenna to one predetermined antenna when the electric field is weak or less than a predetermined electric field strength, and a level detecting means for detecting a received signal level according to the antenna output; A comparison means for comparing the received signal level with the threshold level set according to the currently selected receiving antenna, and a comparison means for comparing the received signal level with the threshold level corresponding to the currently selected receiving antenna. If the received signal level is at or above the threshold level, the receiving antenna used for reception is switched according to the increase in multipath noise, and if the received signal level is lower than the threshold level corresponding to the currently selected receiving antenna. and switching means for selecting a predetermined main receiving antenna.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987014032U JPH0430839Y2 (en) | 1987-02-02 | 1987-02-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1987014032U JPH0430839Y2 (en) | 1987-02-02 | 1987-02-02 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63121932U true JPS63121932U (en) | 1988-08-08 |
| JPH0430839Y2 JPH0430839Y2 (en) | 1992-07-24 |
Family
ID=30803648
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1987014032U Expired JPH0430839Y2 (en) | 1987-02-02 | 1987-02-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0430839Y2 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59104647U (en) * | 1982-12-28 | 1984-07-14 | 原田工業株式会社 | FM wave receiving antenna device for vehicles |
| JPS60172452U (en) * | 1984-04-23 | 1985-11-15 | アルパイン株式会社 | Diversity receiving device |
-
1987
- 1987-02-02 JP JP1987014032U patent/JPH0430839Y2/ja not_active Expired
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59104647U (en) * | 1982-12-28 | 1984-07-14 | 原田工業株式会社 | FM wave receiving antenna device for vehicles |
| JPS60172452U (en) * | 1984-04-23 | 1985-11-15 | アルパイン株式会社 | Diversity receiving device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0430839Y2 (en) | 1992-07-24 |
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