JPS5580932A - Detecting system for absolute delay time difference - Google Patents
Detecting system for absolute delay time differenceInfo
- Publication number
- JPS5580932A JPS5580932A JP15505978A JP15505978A JPS5580932A JP S5580932 A JPS5580932 A JP S5580932A JP 15505978 A JP15505978 A JP 15505978A JP 15505978 A JP15505978 A JP 15505978A JP S5580932 A JPS5580932 A JP S5580932A
- Authority
- JP
- Japan
- Prior art keywords
- output
- delay time
- reception
- signals
- time difference
- 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
- H04B7/0891—Space-time diversity
- H04B7/0894—Space-time diversity using different delays between antennas
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Transmission System (AREA)
Abstract
PURPOSE:To obtain the reception output signal featuring the reduced deterioration of the transmission quality for the space diversity receiver by detecting the delay time defference between two units of reception signals through the phase detector. CONSTITUTION:The space diversity signals of the FDM-FM system are received at reception RF parts MIX2A and 2B via antennas 1A and 1B. And the IF output of MIX2A and 2B are applied to reception IF parts 5A and 5B directly and via variable delay part 4 respectively. These output are turned to the IF output through compounding part 10, and at the same time the pilot signals are extracted via demodulators 6A and 6B plus pilot filters 7A and 7B. Then the output of filter 7A and 7B are applied to phase detector 9 via phase shifter 8 and directly respectively. Detector 9 detects the delay time difference between both signals and then gives the control so that the delay time difference may be zero for delay part 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15505978A JPS5580932A (en) | 1978-12-14 | 1978-12-14 | Detecting system for absolute delay time difference |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP15505978A JPS5580932A (en) | 1978-12-14 | 1978-12-14 | Detecting system for absolute delay time difference |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5580932A true JPS5580932A (en) | 1980-06-18 |
Family
ID=15597760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP15505978A Pending JPS5580932A (en) | 1978-12-14 | 1978-12-14 | Detecting system for absolute delay time difference |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5580932A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0224627U (en) * | 1988-07-30 | 1990-02-19 | ||
| JPH0568945U (en) * | 1991-02-22 | 1993-09-17 | ナガヤ機械株式会社 | Belt conveyor device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50161112A (en) * | 1974-06-17 | 1975-12-26 |
-
1978
- 1978-12-14 JP JP15505978A patent/JPS5580932A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS50161112A (en) * | 1974-06-17 | 1975-12-26 |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0224627U (en) * | 1988-07-30 | 1990-02-19 | ||
| JPH0568945U (en) * | 1991-02-22 | 1993-09-17 | ナガヤ機械株式会社 | Belt conveyor device |
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