JPS57125537A - Space diversity receiver - Google Patents
Space diversity receiverInfo
- Publication number
- JPS57125537A JPS57125537A JP56010885A JP1088581A JPS57125537A JP S57125537 A JPS57125537 A JP S57125537A JP 56010885 A JP56010885 A JP 56010885A JP 1088581 A JP1088581 A JP 1088581A JP S57125537 A JPS57125537 A JP S57125537A
- Authority
- JP
- Japan
- Prior art keywords
- output
- power
- phase
- signal
- power synthesizer
- 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
- H04B7/0837—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 pre-detection combining
- H04B7/084—Equal gain combining, only phase adjustments
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Transmission System (AREA)
Abstract
PURPOSE:To reduce synthesized phase errors based on the deviation of amplitude of a phase modulator, by providing a phase modulator which is modulated toward an opposite direction to each other, in two input paths to a power synthesizer. CONSTITUTION:Frequency converters 1, 2 convert signals IN1, IN2 from two antenas provided beforehand so that the correlation of attenuation or reception power is lowered at fading, into an intermediate frequency signal with an output of a reception local oscillator 3. A phase shifter 4 receiving the output of the converter 1 performs a suitable phase shift operation with a signal of a control circuit 9 and the shifted signal is applied to a power synthesizer 11. The output of the converter 2 is applied to a power synthesizer 12. A power synthesizer 13 synthesizes the 1st output of the power synthesizers 11, 12 to produce the output of the main signal system. The 2nd output of the power synthesizers 11, 12 are subjected to the modulation mutually toward an opposite direction at phase modulators 5, 14 with a signal of a low-frequency oscillator 10. The output of the modulator is given to a power synthesizer 6. The phase modulators 5, 14 can be used at a region with less amplitude deviation and the deviation can be improved correspondingly.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56010885A JPS57125537A (en) | 1981-01-29 | 1981-01-29 | Space diversity receiver |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP56010885A JPS57125537A (en) | 1981-01-29 | 1981-01-29 | Space diversity receiver |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS57125537A true JPS57125537A (en) | 1982-08-04 |
Family
ID=11762764
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP56010885A Pending JPS57125537A (en) | 1981-01-29 | 1981-01-29 | Space diversity receiver |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS57125537A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5345603A (en) * | 1990-11-13 | 1994-09-06 | U.S. Philips Corporation | Receiver arrangement formed by a plurality of receive branches |
-
1981
- 1981-01-29 JP JP56010885A patent/JPS57125537A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5345603A (en) * | 1990-11-13 | 1994-09-06 | U.S. Philips Corporation | Receiver arrangement formed by a plurality of receive branches |
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