JPS63121931U - - Google Patents
Info
- Publication number
- JPS63121931U JPS63121931U JP1403187U JP1403187U JPS63121931U JP S63121931 U JPS63121931 U JP S63121931U JP 1403187 U JP1403187 U JP 1403187U JP 1403187 U JP1403187 U JP 1403187U JP S63121931 U JPS63121931 U JP S63121931U
- Authority
- JP
- Japan
- Prior art keywords
- level
- receiving
- switching
- switching means
- received signal
- 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
- 238000001514 detection method Methods 0.000 claims description 3
- 230000035945 sensitivity Effects 0.000 claims 1
- 238000010586 diagram Methods 0.000 description 4
Landscapes
- Noise Elimination (AREA)
Description
第１図は本考案は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図は従来のダイバーシテイ受信装置のブロツ
ク図、第４図は各アンテナの受信信号レベル−電
界強度特性図である。
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、７ａ
……マルチパスノイズ検出部、７ｂ……切替回路
、３０……ゲインコントローラ。
FIG. 1 is a circuit diagram of such 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 conventional diversity receiver, and FIG. 4 is a received signal level-field strength characteristic diagram of each antenna. 1a, 1b...Antenna, 2...Front end, 3...Level detection circuit, 4...Comparison section, 7a
. . . Multipath noise detection section, 7b . . . Switching circuit, 30 . . . Gain controller.
Claims (1)
テナを有し、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、 受信信号レベルと所定のスレツシヨールドレベ
ルとの大小比較を行う比較手段と、 受信信号レベルが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る切替手段と、 切替手段の選択に連動して受信アンテナ間の感
度差を相殺するように利得調整を行う利得調整手
段とを有することを特徴とするダイバーシテイ受
信装置。[Claims for Utility Model Registration] In a diversity receiving device that has at least two selectively used receiving antennas and switches the receiving antenna to be used according to an increase in multipath noise, a received signal according to the antenna output is provided. a level detection means for detecting the level; a comparison means for comparing the received signal level with a predetermined threshold level; Diversity reception characterized by having a switching means for switching the receiving antenna used for reception according to the selection of the switching means, and a gain adjustment means for adjusting the gain so as to cancel the sensitivity difference between the receiving antennas in conjunction with the selection of the switching means. Device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1403187U JPS63121931U (en) | 1987-02-02 | 1987-02-02 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1403187U JPS63121931U (en) | 1987-02-02 | 1987-02-02 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS63121931U true JPS63121931U (en) | 1988-08-08 |
Family
ID=30803646
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1403187U Pending JPS63121931U (en) | 1987-02-02 | 1987-02-02 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63121931U (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6014547B2 (en) * | 1979-11-14 | 1985-04-13 | 神鋼電機株式会社 | Multi-drop data communication method |
-
1987
- 1987-02-02 JP JP1403187U patent/JPS63121931U/ja active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6014547B2 (en) * | 1979-11-14 | 1985-04-13 | 神鋼電機株式会社 | Multi-drop data communication method |
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