JPS56122502A - Mobile receiver - Google Patents
Mobile receiverInfo
- Publication number
- JPS56122502A JPS56122502A JP2628280A JP2628280A JPS56122502A JP S56122502 A JPS56122502 A JP S56122502A JP 2628280 A JP2628280 A JP 2628280A JP 2628280 A JP2628280 A JP 2628280A JP S56122502 A JPS56122502 A JP S56122502A
- Authority
- JP
- Japan
- Prior art keywords
- circuit
- output
- noise
- tuner
- constitution
- 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
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
- H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
- H04B7/0805—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching
- H04B7/0814—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching based on current reception conditions, e.g. switching to different antenna when signal level is below threshold
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
- Noise Elimination (AREA)
Abstract
PURPOSE:Not to only reduce a multipath noise but also make the whole antenna part small-sizesd, by selecting the output of plural antenna elements. CONSTITUTION:The high speed switching circuit 12 amplifies an input signal of the loop antenna 1a, 1b alternatively, and switches and outputs it to its output terminal. The output terminal of the circuit 12 is connected to the input terminal of the front part 14 of the FM tuner 13. The noise detection circuit 17 is constituted of an HPF18, an amplifier 19, a Schmitt trigger circuit 20 and an wave detection circuit 21, by which only the high frequency component of a demodulation output of the IF part 15 of the tuner 13 is made to pass through. According to said constitution, when a multipath noise has occurred in an output of the IF part 15, the noise detection circuit 17 provides a trigger signal to the FF circuit 23 for forming a control circuit 22 of the circuit 12. The output of the FF circuit 23 becomes a control input of the circuit 12, and commands a switching operation of the circuit 12.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2628280A JPS56122502A (en) | 1980-03-03 | 1980-03-03 | Mobile receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2628280A JPS56122502A (en) | 1980-03-03 | 1980-03-03 | Mobile receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS56122502A true JPS56122502A (en) | 1981-09-26 |
Family
ID=12188924
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP2628280A Pending JPS56122502A (en) | 1980-03-03 | 1980-03-03 | Mobile receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS56122502A (en) |
-
1980
- 1980-03-03 JP JP2628280A patent/JPS56122502A/en active Pending
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