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JPS6460118A - Radio transmission equipment - Google Patents

Radio transmission equipment

Info

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
Application number
JP21674987A
Other languages
Japanese (ja)
Inventor
Yasushi Shima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Hochiki Corp
Original Assignee
Hochiki Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hochiki Corp filed Critical Hochiki Corp
Priority to JP21674987A priority Critical patent/JPS6460118A/en
Publication of JPS6460118A publication Critical patent/JPS6460118A/en
Pending legal-status Critical Current

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.
JP21674987A 1987-08-31 1987-08-31 Radio transmission equipment Pending JPS6460118A (en)

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)

* Cited by examiner, † Cited by third party
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)

* Cited by examiner, † Cited by third party
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 device

Patent Citations (4)

* Cited by examiner, † Cited by third party
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 device

Cited By (8)

* Cited by examiner, † Cited by third party
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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