JPS5472616A - Synchronizing system for code assignment diffusion - Google Patents
Synchronizing system for code assignment diffusionInfo
- Publication number
- JPS5472616A JPS5472616A JP13972477A JP13972477A JPS5472616A JP S5472616 A JPS5472616 A JP S5472616A JP 13972477 A JP13972477 A JP 13972477A JP 13972477 A JP13972477 A JP 13972477A JP S5472616 A JPS5472616 A JP S5472616A
- Authority
- JP
- Japan
- Prior art keywords
- code sequence
- diffusion code
- time
- diffusion
- initial acquisition
- 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
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Radio Relay Systems (AREA)
Abstract
PURPOSE:To indend shortening of the time of initial acquisition by generating a diffusion code sequence for initial acquisition and transmitting it after secondary modulation in the transmitting diffusion code sequence generating portion and by generating a received diffusion code sequence and demodulating it in the receiving side. CONSTITUTION:Transmitting diffusion code sequence generating protion 13 generates respectively a diffusion code sequence for initial acquisition at the time of transmission and a diffusion code sequence for call assigned at the time of call according to a command from control part 11. After secondary modulation which makes the phase of a signal invert by means of codes 0 and 1 in the code sequence is applied to a carrier to which primary modulation was applied by FM etc. and the spectrum of frequency is diffused, the carrier is sent from terminal 14. On the other hand, receiving part 16 demodulates an input applied from terminal 15 and synchronizes it at the time of reception; at the time of call, received diffusion code sequence generating portion 17 generates an assigned diffusion code sequence for call according to a command from control part 11 and receiving part 16 demodulates it. Thus, the time of initial acquisition can be shortened.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13972477A JPS5472616A (en) | 1977-11-21 | 1977-11-21 | Synchronizing system for code assignment diffusion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP13972477A JPS5472616A (en) | 1977-11-21 | 1977-11-21 | Synchronizing system for code assignment diffusion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS5472616A true JPS5472616A (en) | 1979-06-11 |
Family
ID=15251911
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP13972477A Pending JPS5472616A (en) | 1977-11-21 | 1977-11-21 | Synchronizing system for code assignment diffusion |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS5472616A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996005669A1 (en) * | 1994-08-16 | 1996-02-22 | Unisys Corporation | Synchronous multipoint-to-point cdma communication system |
-
1977
- 1977-11-21 JP JP13972477A patent/JPS5472616A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1996005669A1 (en) * | 1994-08-16 | 1996-02-22 | Unisys Corporation | Synchronous multipoint-to-point cdma communication system |
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