JPS6460118A - Radio transmission equipment - Google Patents
Radio transmission equipmentInfo
- Publication number
- JPS6460118A JPS6460118A JP21674987A JP21674987A JPS6460118A JP S6460118 A JPS6460118 A JP S6460118A JP 21674987 A JP21674987 A JP 21674987A JP 21674987 A JP21674987 A JP 21674987A JP S6460118 A JPS6460118 A JP S6460118A
- Authority
- JP
- Japan
- Prior art keywords
- transmission
- antenna
- code signal
- polarization
- word
- 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
Landscapes
- Radio Transmission System (AREA)
Abstract
PURPOSE:To obtain receiving effect with a polarization diversity even in case of small power radio transmission or the transmission of a weak wave by alternately switching the transmission of a code signal with an antenna for horizontal polarization and an antenna for vertical polarization by a transmitter every one word of the code signal at least. CONSTITUTION:A code generator 2 generates the code signal while a detecting signal is obtained from an abnormality sensor 1 and the generation of the code signal is stopped when the detecting signal is turned off from the abnormality sensor 1. An antenna switching circuit 4 is alternately changed over between switching positions (a) and (b) in each one word of the code signal outputted from the code generator 2. For example, when the antenna switching circuit 4 is in the switching position (a) side, a feeding is executed to a transmission antenna 5 for horizontal polarization and the transmission is executed as the horizontal polarization. Then, the antenna switching circuit 4 is changed over to the switching position (b) side by the code signal of the next one word and the transmission is executed as the vertical polarization form a transmission antenna 6 for vertical polarization. Thus, even in case of the transmission by the weak power, the receiving condition to be practically equal with the polarization diversity system can be obtained.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21674987A JPS6460118A (en) | 1987-08-31 | 1987-08-31 | Radio transmission equipment |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP21674987A JPS6460118A (en) | 1987-08-31 | 1987-08-31 | Radio transmission equipment |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6460118A true JPS6460118A (en) | 1989-03-07 |
Family
ID=16693320
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP21674987A Pending JPS6460118A (en) | 1987-08-31 | 1987-08-31 | Radio transmission equipment |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6460118A (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0329088A (en) * | 1989-06-27 | 1991-02-07 | Matsushita Electric Works Ltd | Wireless transmission module for security sensor |
US6243565B1 (en) | 1996-06-18 | 2001-06-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for transmitting communication signals using frequency and polarization diversity |
WO2001099306A1 (en) * | 2000-06-21 | 2001-12-27 | Matsushita Electric Industrial Co., Ltd. | Receiving device and transmitting device |
WO2004023422A1 (en) * | 2002-09-09 | 2004-03-18 | Ntn Corporation | Wireless sensor system and bearing device having wireless sensor |
US7612665B2 (en) | 2003-09-19 | 2009-11-03 | Ntn Corporation | Wireless sensor system and bearing assembly having built-in wireless sensor |
US7688216B2 (en) | 2003-08-29 | 2010-03-30 | Ntn Corporation | Wireless sensor system and wheel support bearing assembly utilizing the same |
US8165048B2 (en) | 2008-04-07 | 2012-04-24 | Canon Kabushiki Kaisha | Wireless communication system, terminal station, and wireless communication method |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS53117302A (en) * | 1977-03-23 | 1978-10-13 | Nec Corp | Omnibus transmission system |
JPS557090B2 (en) * | 1975-11-12 | 1980-02-22 | ||
JPS5577247A (en) * | 1978-12-06 | 1980-06-10 | Kokusai Electric Co Ltd | Diversity transmitter-receiver |
JPS61288295A (en) * | 1985-06-14 | 1986-12-18 | ホーチキ株式会社 | Abnormal condition alarm |
-
1987
- 1987-08-31 JP JP21674987A patent/JPS6460118A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS557090B2 (en) * | 1975-11-12 | 1980-02-22 | ||
JPS53117302A (en) * | 1977-03-23 | 1978-10-13 | Nec Corp | Omnibus transmission system |
JPS5577247A (en) * | 1978-12-06 | 1980-06-10 | Kokusai Electric Co Ltd | Diversity transmitter-receiver |
JPS61288295A (en) * | 1985-06-14 | 1986-12-18 | ホーチキ株式会社 | Abnormal condition alarm |
Cited By (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH0329088A (en) * | 1989-06-27 | 1991-02-07 | Matsushita Electric Works Ltd | Wireless transmission module for security sensor |
US6243565B1 (en) | 1996-06-18 | 2001-06-05 | Telefonaktiebolaget Lm Ericsson (Publ) | Method and apparatus for transmitting communication signals using frequency and polarization diversity |
WO2001099306A1 (en) * | 2000-06-21 | 2001-12-27 | Matsushita Electric Industrial Co., Ltd. | Receiving device and transmitting device |
WO2004023422A1 (en) * | 2002-09-09 | 2004-03-18 | Ntn Corporation | Wireless sensor system and bearing device having wireless sensor |
JP2004133911A (en) * | 2002-09-09 | 2004-04-30 | Ntn Corp | Wireless sensor system and bearing apparatus having wireless sensor |
US7688216B2 (en) | 2003-08-29 | 2010-03-30 | Ntn Corporation | Wireless sensor system and wheel support bearing assembly utilizing the same |
US7612665B2 (en) | 2003-09-19 | 2009-11-03 | Ntn Corporation | Wireless sensor system and bearing assembly having built-in wireless sensor |
US8165048B2 (en) | 2008-04-07 | 2012-04-24 | Canon Kabushiki Kaisha | Wireless communication system, terminal station, and wireless communication method |
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