JPS6430341A - Spread spectrum communications system - Google Patents
Spread spectrum communications systemInfo
- Publication number
- JPS6430341A JPS6430341A JP62187272A JP18727287A JPS6430341A JP S6430341 A JPS6430341 A JP S6430341A JP 62187272 A JP62187272 A JP 62187272A JP 18727287 A JP18727287 A JP 18727287A JP S6430341 A JPS6430341 A JP S6430341A
- Authority
- JP
- Japan
- Prior art keywords
- spreading
- wave signals
- modulated wave
- spreading code
- plural
- 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
- 238000001228 spectrum Methods 0.000 title 1
- 230000003595 spectral effect Effects 0.000 abstract 3
- 238000001514 detection method Methods 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
Abstract
PURPOSE:To improve a signal-to-noise ratio without changing a process gain by close arranging plural primary modulated wave signals in a condition in which they are not interfered and executing a spectral spreading by a single spreading code. CONSTITUTION:Plural primary modulated wave signals are prepared to a piece of information data, respective primary modulated wave signals are close arranged in maintaining the condition in which they do not interfere with one another, and by executing a spreading by a spreading code to consider a clock signal frequency for the spreading code set beforehand and the period of the spreading code, the spectral spreading without a spectral interference is executed. Further, at the time of demodulating, the detection of plural modulated wave signals, after a reverse spreading, is executed. Thus, the S/N of the information data obtained by being detected can be improved in proportion to plural primary modulated wave signals, and when an S/N improvement degree is equal, a spectrally spread band width can be made narrow by the degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62187272A JPS6430341A (en) | 1987-07-27 | 1987-07-27 | Spread spectrum communications system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62187272A JPS6430341A (en) | 1987-07-27 | 1987-07-27 | Spread spectrum communications system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6430341A true JPS6430341A (en) | 1989-02-01 |
Family
ID=16203087
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62187272A Pending JPS6430341A (en) | 1987-07-27 | 1987-07-27 | Spread spectrum communications system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6430341A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0371710A (en) * | 1989-08-10 | 1991-03-27 | Murata Mfg Co Ltd | Resonator and band pass filter and frequency adjustment method |
| JPH0374918A (en) * | 1989-08-16 | 1991-03-29 | Murata Mfg Co Ltd | Band pass filter |
| JPH0374917A (en) * | 1989-08-16 | 1991-03-29 | Murata Mfg Co Ltd | Band pass filter |
| JPH03254512A (en) * | 1990-03-05 | 1991-11-13 | Murata Mfg Co Ltd | Resonator |
-
1987
- 1987-07-27 JP JP62187272A patent/JPS6430341A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0371710A (en) * | 1989-08-10 | 1991-03-27 | Murata Mfg Co Ltd | Resonator and band pass filter and frequency adjustment method |
| JPH0374918A (en) * | 1989-08-16 | 1991-03-29 | Murata Mfg Co Ltd | Band pass filter |
| JPH0374917A (en) * | 1989-08-16 | 1991-03-29 | Murata Mfg Co Ltd | Band pass filter |
| JPH03254512A (en) * | 1990-03-05 | 1991-11-13 | Murata Mfg Co Ltd | Resonator |
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