JPH09121180A - Spread spectrum communication equipment - Google Patents
Spread spectrum communication equipmentInfo
- Publication number
- JPH09121180A JPH09121180A JP8252705A JP25270596A JPH09121180A JP H09121180 A JPH09121180 A JP H09121180A JP 8252705 A JP8252705 A JP 8252705A JP 25270596 A JP25270596 A JP 25270596A JP H09121180 A JPH09121180 A JP H09121180A
- Authority
- JP
- Japan
- Prior art keywords
- signal
- transmission
- spectrum
- spread
- antenna
- 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
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】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。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spread spectrum communication device for wide band transmission, and more particularly to a spread spectrum communication device suitable for transmitting large capacity information.
【０００２】[0002]
【従来の技術】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。2. Description of the Related Art A spread spectrum communication system realizes high quality communication by spreading and transmitting information to be transmitted with a spread signal having a bandwidth sufficiently wider than the bandwidth of this information signal. is there.
【０００３】[0003]
【発明が解決しようとする課題】ところが、広帯域幅信
号の伝送は、アンテナや増福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。However, the transmission of the wide band signal is deteriorated by the characteristics of the transmission line including the antenna and the amplifier, and high quality communication cannot be performed.
【０００４】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滅し、
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 the deterioration of the transmission spectrum due to the wide band transmission of the spread spectrum communication device,
To provide higher quality communication.
【０００５】[0005]
【課題を解決するための手段】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-mentioned object, the present invention grasps or estimates a transmission line characteristic in advance and cancels the characteristic so that the output spectrum of the transmitting side is normal at the receiving side. The deterioration of the spectrum is reduced by providing means for obtaining a normal spectrum by increasing and transmitting the spectrum so that the signal is emphasized on the transmission side and attenuating the signal on the reception side.
【０００６】[0006]
【発明の実施の形態】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.
【０００７】図１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(平)衡変調器12において変
調された搬送波発振器14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、図３(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
増強器15の出力となる伝送信号S7は、例えば、図３(b)
に示すように増強され、アンテナA1より送出される。図
３(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 structure of the communication device of the present invention on the transmitter side. The transmission information S1 is spread by the balanced modulator 11 by the spreading code from the spreading code generator 13 and the transmission signal S2 is transmitted.
Becomes This transmission signal S2 is transmitted by the carrier wave from the carrier wave oscillator 14 modulated by the modulation / balance modulator 12 to the transmission signal S3.
Becomes This transmission signal S2 is a signal having a wide range as shown in FIG. The transmission signal S2 is spectrally amplified by the spectrum amplifier 15. The amount of spectrum enhancement is set in advance to a value that cancels out transmission channel characteristics that are grasped or estimated. The transmission signal S7 which is the output of the spectrum intensifier 15 is, for example, as shown in FIG.
As shown in, the signal is amplified and transmitted from the antenna A1. FIG. 3C shows the transmission line characteristics including the antenna amplifier,
Deteriorate the transmitted signal.
【０００８】図２は、本発明の通信装置の受信機側の構
成を示すもので、図１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S8となる。この信号S8
は、図３(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、図３(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S1O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S1Oを復調し、伝達情報S11を出力する。FIG. 2 shows the configuration of the communication apparatus according to the present invention on the receiver side. The transmission signal S7 from the transmitter shown in FIG.
Is received by the antenna A2. This received wave is amplified by the high frequency amplifier 21 to become a signal S8. This signal S8
Is as shown in FIG. This signal S8 is output from the spectrum corrector 26 as a signal S9. This signal S9
Is modified as shown in FIG. Thereby, the deterioration of the spectrum can be reduced. Then the signal
S9 is despread in the balanced modulator 22 by the spreading code from the same spreading code generator 24 as the transmitting side, and is output to the baseband demodulator 23 as a signal S10. The baseband demodulator 23 uses the local oscillation wave from the local oscillator 25 to
It demodulates signal S1O and outputs transmission information S11.
【０００９】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、図３(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-mentioned embodiment, the spectrum corrector 26 is provided on the receiver side. However, if the transmission path characteristics shown in FIG. Obviously.
【００１０】[0010]
【発明の効果】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, since the transmission signal output from the transmitter side is set to such a value as to cancel the transmission line characteristic, the amount of spectral amplification of which is previously known or estimated, and output, S / N by wide band transmission line
It is possible to reduce the deterioration of the ratio. As a result, high quality communication can be enabled.
【図１】本発明の通信装置の送信機側構成を示す図であ
る。FIG. 1 is a diagram showing a transmitter-side configuration of a communication device of the present invention.
【図２】本発明の通信装置の受信機側を示す図である。FIG. 2 is a diagram showing a receiver side of the communication device of the present invention.
【図３】本発明の装置における各信号のスペクトル図で
ある。FIG. 3 is a spectrum diagram of each signal in the device of the present invention.
11,12,22…平衡変調器、13,24…拡散符号発生器、21…
高周波増幅器、14…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。11,12,22 ... Balanced modulator, 13,24 ... Spreading code generator, 21 ...
High frequency amplifier, 14 ... Carrier oscillator, 25 ... Local oscillator, 15
... spectrum amplifier, 26 ... spectrum corrector.
Claims (1)
変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、中心部
分との比較において、増強された状態に変形して、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、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
徴とするスペクトル拡散通信装置。1. A transmitter, which spread-modulates and transmits transmission information with a spreading code having a wide bandwidth, and a receiver which despreads with the same spreading code on the receiving side to obtain transmission information, and is mainly used indoors. In direct-spread spectrum spread spectrum communication in which the antenna communicates with the antenna, the signal of the peripheral part that is far from the carrier frequency within the spectrum band of the transmission signal to the transmitter side is transformed into an enhanced state in comparison with the central part. Then, a spectrum amplifier that makes the transmission signal spectrum characteristic flat as a whole is provided, and the receiver side has a spectrum correction for attenuating and correcting the enhanced signal component of the portion apart from the carrier frequency within the spectrum band of the reception signal. A spread spectrum communication device, characterized in that a spreader is provided.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8252705A JPH09121180A (en) | 1996-09-25 | 1996-09-25 | Spread spectrum communication equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8252705A JPH09121180A (en) | 1996-09-25 | 1996-09-25 | Spread spectrum communication equipment |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23162296A Division JP2829282B2 (en) | 1996-09-02 | 1996-09-02 | Spread spectrum communication equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH09121180A true JPH09121180A (en) | 1997-05-06 |
Family
ID=17241110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8252705A Pending JPH09121180A (en) | 1996-09-25 | 1996-09-25 | Spread spectrum communication equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH09121180A (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
-
1996
- 1996-09-25 JP JP8252705A patent/JPH09121180A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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