JPH0570973B2 - - Google Patents
Info
- Publication number
- JPH0570973B2 JPH0570973B2 JP59052109A JP5210984A JPH0570973B2 JP H0570973 B2 JPH0570973 B2 JP H0570973B2 JP 59052109 A JP59052109 A JP 59052109A JP 5210984 A JP5210984 A JP 5210984A JP H0570973 B2 JPH0570973 B2 JP H0570973B2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- spectrum
- transmission
- transmission information
- spreading code
- 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.)
- Expired - Lifetime
Links
- 230000005540 biological transmission Effects 0.000 claims description 25
- 238000001228 spectrum Methods 0.000 claims description 22
- 239000003607 modifier Substances 0.000 claims description 4
- 230000003595 spectral effect Effects 0.000 claims description 4
- 230000002093 peripheral effect Effects 0.000 claims 1
- 230000006866 deterioration Effects 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 230000003321 amplification Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 230000010355 oscillation Effects 0.000 description 1
- 238000000411 transmission spectrum Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
Description
【発明の詳細な説明】
〔発明の利用分野〕
本発明は、広帯域幅の伝送を行うスペクトル拡
散通信装置に関するものであり、特に大容量情報
の伝送に好適なスペクトル拡散通信装置に関する
ものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to a spread spectrum communication device that performs wide-bandwidth transmission, and particularly to a spread spectrum communication device suitable for transmitting large amounts of information.
スペクトル拡散通信方式は、伝送すべき情報を
この情報信号の持つ帯域幅より十分に広い帯域幅
を持つ拡散信号で拡散し送信することにより、高
品質の通信を実現するものである。ところが、広
帯域幅信号の伝送は、アンテナや増幅器を含めた
伝送路の特性により劣化を受け、高品質の通信を
行うことができないものであつた。
The spread spectrum communication system realizes high quality communication by spreading and transmitting information to be transmitted using a spread signal having a bandwidth sufficiently wider than the bandwidth of the information signal. However, the transmission of wide-bandwidth signals suffers from deterioration due to the characteristics of transmission paths including antennas and amplifiers, making it impossible to perform high-quality communications.
本発明の目的は、スペクトル拡散通信装置の広
帯域幅伝送による伝送スペクトルの劣化を軽減
し、より高品質の通信を提供することにある。
An object of the present invention is to reduce deterioration of transmission spectrum due to wide bandwidth transmission of a spread spectrum communication device and provide higher quality communication.
本発明は上記の目的を達成するために、伝送路
特性をあらかじめ把握、または推定し、その特性
を打ち消すように、送信側の出力スペクトルを受
信側で正常なスペクトルが得られるように増強し
て送信し、送信側で強調した信号を、受信側で減
衰することにより正常なスペクトルを得る手段を
設けて、スペクトルの劣化を軽減するものであ
る。
In order to achieve the above object, the present invention grasps or estimates the transmission path characteristics in advance, and increases the output spectrum on the transmitting side so as to cancel out the characteristics and obtain a normal spectrum on the receiving side. A means is provided to obtain a normal spectrum by attenuating a signal transmitted and emphasized on the transmitting side on the receiving side, thereby reducing deterioration of the spectrum.
以下本発明の実施例を図面を参照して説明す
る。
Embodiments of the present invention will be described below with reference to the drawings.
第１図は本発明の通信装置の送信機側の構成を
示すもので、伝送情報Ｓ１は拡散符号発生１３か
らの拡散符号により、平衡変調器１１で拡散され
て、伝送信号Ｓ２となる。この伝送信号Ｓ２は変
衡変調器１２において変調された搬送波発振器１
４からの搬送波により伝送信号Ｓ３となる。この
伝送信号Ｓ２は第３図ａに示すように広域幅をも
つ信号となつている。この伝送信号Ｓ２はスペク
トル増幅器１５によりスペクトル増幅される。こ
のスペクトル増強量は予め把握または推定される
伝送路特性を打ち消すような値に設定されてい
る。このスペクトル増幅器１５の出力となる伝送
信号Ｓ７は例えば第３図ｂに示すように増強さ
れ、アンテナＡ１より送出される。第３図ｃはア
ンテナ増幅器を含めた伝送路特性を示し、伝送信
号に劣化を与える。 FIG. 1 shows the configuration of the transmitter side of the communication device of the present invention, in which transmission information S1 is spread by a balanced modulator 11 using a spreading code from a spreading code generator 13 to become a transmission signal S2. This transmission signal S2 is modulated by a carrier wave oscillator 1 in a balanced modulator 12.
The carrier wave from 4 becomes the transmission signal S3. This transmission signal S2 has a wide bandwidth as shown in FIG. 3a. This transmission signal S2 is spectrally amplified by a spectrum amplifier 15. This amount of spectral enhancement is set to a value that cancels out the transmission path characteristics that are known or estimated in advance. The transmission signal S7, which is the output of the spectrum amplifier 15, is amplified as shown in FIG. 3b, for example, and sent out from the antenna A1. FIG. 3c shows the transmission path characteristics including the antenna amplifier, which degrades the transmitted signal.
第２図は本発明の通信装置の受信機側の構成を
示すもので、第１図に示した送信機からの送出信
号Ｓ７はアンテナＡ２により受信される。この受
信波は高周波増幅器２１により増幅されて信号Ｓ
８となる。この信号Ｓ８は第３図ｄのようにな
る。この信号Ｓ８はスペクトル修正器２６におい
て信号Ｓ９として出力される。この信号Ｓ９は第
３図ｅに示すように修正される。これにより、ス
ペクトルの劣化を軽減することができる。その
後、信号Ｓ９は平衡変調器２２において送信側と
同一の拡散符号発生器２４からの拡散符号により
逆拡散され、信号Ｓ１０としてベースバンド復調
器２３に出力する。このベースバンド復調器２３
は局部発振器２５からの局部発振波により、信号
Ｓ１０を復調し伝達情報Ｓ１１を出力する。 FIG. 2 shows the configuration of the receiver side of the communication device of the present invention, and the transmission signal S7 from the transmitter shown in FIG. 1 is received by the antenna A2. This received wave is amplified by the high frequency amplifier 21 and the signal S
It becomes 8. This signal S8 becomes as shown in FIG. 3d. This signal S8 is outputted by the spectrum modifier 26 as a signal S9. This signal S9 is modified as shown in FIG. 3e. This makes it possible to reduce spectrum deterioration. Thereafter, the signal S9 is despread in the balanced modulator 22 using a spreading code from the same spreading code generator 24 as that on the transmitting side, and outputted to the baseband demodulator 23 as a signal S10. This baseband demodulator 23
demodulates the signal S10 using a local oscillation wave from the local oscillator 25 and outputs transmission information S11.
なお、上述の実施例においては、受信機側にス
ペクトル修正器２６を設けたが、第３図ｃに示す
伝送路特性の把握が十分に行われている場合に
は、不要となることは明らかである。 In the above embodiment, the spectrum modifier 26 was provided on the receiver side, but it is clear that it is not necessary if the transmission path characteristics shown in FIG. 3c are sufficiently understood. It is.
本発明によれば、送信機側から出力される伝送
信号は、そのスペクトル増幅量を予め把握または
推定される伝送路特性を打ち消すような値に設定
されて出力されるので、広帯域幅送信波の伝送路
によるＳ／Ｎ比の劣化を軽減することができる。
その結果、高品質の通信を可能にすることができ
る。
According to the present invention, the transmission signal output from the transmitter side is set to a value that cancels out the transmission path characteristics whose spectral amplification amount is known or estimated in advance, so that the transmission signal is Deterioration of the S/N ratio due to the transmission path can be reduced.
As a result, high quality communication can be achieved.
第１図は本発明の通信装置の送信機側構成を示
す図、第２図は本発明の通信装置の受信機側を示
す図、第３図ａ〜ｅは本発明の装置における各信
号のスペクトル図である。
１１，１２，２２……平衡変調器、１３，２４
……拡散符号発生器、２１……高周波増幅器、１
４……搬送波発振器、２５……局部発振器、１５
……スペクトル増幅器、２６……スペクトル修正
器。
FIG. 1 is a diagram showing the configuration of the transmitter side of the communication device of the present invention, FIG. 2 is a diagram showing the receiver side of the communication device of the present invention, and FIGS. It is a spectrum diagram. 11, 12, 22...Balanced modulator, 13, 24
... Spreading code generator, 21 ... High frequency amplifier, 1
4... Carrier wave oscillator, 25... Local oscillator, 15
...spectrum amplifier, 26...spectrum modifier.
Claims (1)
調して送信する送信機と、受信側で同一の拡散符
号で逆拡散して伝送情報を得る受信機とを備え、
主に屋内でアンテナにより通信を行う直接拡散方
式のスペクトル拡散通信において、送信機側に送
信信号のスペクトル帯域内で搬送波周波数から離
れた周辺部分の信号を増強あるいは変形して、全
体として平坦な送信信号スペクトル特性にするス
ペクトル増幅器を設けたことを特徴とするスペク
トル拡散通信装置。 ２ 受信機側に、受信信号のスペクトル帯域内
で、搬送波周波数から離れた部分の増強された信
号成分を減衰、修正するスペクトル修正器を設け
たことを特徴とする特許請求の範囲第１項記載の
スペクトル拡散通信装置。[Claims] 1. A transmitter that spread-modulates transmission information using a wide-bandwidth spreading code and transmits the signal, and a receiver that obtains the transmission information by despreading the transmission information using the same spreading code on the receiving side,
In direct-sequence spread spectrum communication, which is mainly carried out indoors using antennas, the transmitter side enhances or transforms the peripheral portion of the signal far from the carrier frequency within the spectral band of the transmitted signal, resulting in flat transmission as a whole. A spread spectrum communication device characterized by being provided with a spectrum amplifier for adjusting signal spectrum characteristics. 2. Claim 1, characterized in that the receiver side is provided with a spectrum modifier that attenuates and modifies the amplified signal component in a portion away from the carrier frequency within the spectral band of the received signal. spread spectrum communication equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59052109A JPS60197040A (en) | 1984-03-21 | 1984-03-21 | Spectrum diffusion communicating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59052109A JPS60197040A (en) | 1984-03-21 | 1984-03-21 | Spectrum diffusion communicating device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23162296A Division JP2829282B2 (en) | 1996-09-02 | 1996-09-02 | Spread spectrum communication equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60197040A JPS60197040A (en) | 1985-10-05 |
| JPH0570973B2 true JPH0570973B2 (en) | 1993-10-06 |
Family
ID=12905692
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59052109A Granted JPS60197040A (en) | 1984-03-21 | 1984-03-21 | Spectrum diffusion communicating device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60197040A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2812278B2 (en) * | 1996-01-16 | 1998-10-22 | 日本電気株式会社 | Data transmission method and data transmission device |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5116730A (en) * | 1974-08-02 | 1976-02-10 | Nippon Kokan Kk | KOJUHOHO |
| JPS594350A (en) * | 1982-06-30 | 1984-01-11 | Hitachi Ltd | Spread spectrum communication device |
| JPS596631A (en) * | 1982-07-05 | 1984-01-13 | Ricoh Co Ltd | Device for compensating line characteristic |
-
1984
- 1984-03-21 JP JP59052109A patent/JPS60197040A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5116730A (en) * | 1974-08-02 | 1976-02-10 | Nippon Kokan Kk | KOJUHOHO |
| JPS594350A (en) * | 1982-06-30 | 1984-01-11 | Hitachi Ltd | Spread spectrum communication device |
| JPS596631A (en) * | 1982-07-05 | 1984-01-13 | Ricoh Co Ltd | Device for compensating line characteristic |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60197040A (en) | 1985-10-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |