JPH018045Y2 - - Google Patents
Info
- Publication number
- JPH018045Y2 JPH018045Y2 JP1982039211U JP3921182U JPH018045Y2 JP H018045 Y2 JPH018045 Y2 JP H018045Y2 JP 1982039211 U JP1982039211 U JP 1982039211U JP 3921182 U JP3921182 U JP 3921182U JP H018045 Y2 JPH018045 Y2 JP H018045Y2
- Authority
- JP
- Japan
- Prior art keywords
- signal
- frequency
- frequency hopping
- circuit
- hopping
- 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
Links
- 230000001629 suppression Effects 0.000 claims description 12
- 230000005540 biological transmission Effects 0.000 claims description 6
- 230000002194 synthesizing effect Effects 0.000 claims 1
- 238000001514 detection method Methods 0.000 description 5
- 238000010586 diagram Methods 0.000 description 5
- 235000008694 Humulus lupulus Nutrition 0.000 description 2
- 230000001427 coherent effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000001360 synchronised effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000002238 attenuated effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 230000009022 nonlinear effect Effects 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 238000001228 spectrum Methods 0.000 description 1
- 238000003786 synthesis reaction Methods 0.000 description 1
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- Transceivers (AREA)
- Noise Elimination (AREA)
Description
【考案の詳細な説明】
本考案は周波数シンセサイザの切換時間々隔中
に発生する２個の周波数のスプリアスを抑圧する
ようにした周波数ホツピング送受信装置に関す
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a frequency hopping transmitter/receiver that suppresses spurious signals of two frequencies occurring during switching time intervals of a frequency synthesizer.
一般に、スペクトラム拡散通信方式の一種に、
周波数を定められた時間間隔で所定の周波数順序
で周波数をホツプ、拡散させて行う周波数ホツピ
ング拡散通信方式があるが、この通信方式におい
て、独立な周波数源を高速に切換えて周波数をホ
ツプさせる高速周波数切換シンセサイザが送・受
信機において必要である。この高速周波数切換
は、第１図ａに示すように符号により切換られる
が、各符号の切換には切換時間帯（第１図ｂ）を
必要とする。この高速に切換えられるシンセサイ
ザによつて発生される信号は、必要なホツプ幅以
上に帯域幅が拡がらないよう帯域制限炉波器等に
より帯域制限回路を通過させているため、切換え
時間における立上り、立下りの時間に有限の時間
を要することとなり、この時間帯には、第１図
ｃ，ｄに示すように必然的に一方から他方へ切換
えられる２個の周波数成分1，2が共存すること
になる。これら２つの周波数成分は、周波数変換
器、ミキサ或いは増幅系等の非線形回路を通過す
る際、回路の非線形効果によつて多数の不要波成
分をも発生し、そのうち必要な信号通過帯域内に
落ちるものはスプリアス成分として通信信号に固
定的に重畳され伝送信号に好ましからざる誤りの
増加をもたらすことになる。なおこの説明におい
ては、シンセサイザとして所謂ノン・コヒーレン
トな場合を説明したが、コヒーレントな場合でも
回路の構成方法の如何によつては同種の現象を生
じ、何れの場合にも起り得る不具合現象である。 Generally, one type of spread spectrum communication method is
There is a frequency hopping spread communication method that hops and spreads frequencies in a predetermined order of frequencies at predetermined time intervals. A switched synthesizer is required at the transmitter/receiver. This high-speed frequency switching is performed by codes as shown in FIG. 1a, but switching of each code requires a switching time period (FIG. 1b). The signal generated by this high-speed switching synthesizer is passed through a band-limiting circuit using a band-limiting reactor or the like to prevent the bandwidth from expanding beyond the required hop width. A finite time is required for the falling time, and during this time period, two frequency components 1 and 2 coexist, which are inevitably switched from one to the other, as shown in Figure 1 c and d. become. When these two frequency components pass through a nonlinear circuit such as a frequency converter, mixer, or amplification system, many unnecessary wave components are generated due to the nonlinear effect of the circuit, and some of them fall within the required signal passband. This is permanently superimposed on the communication signal as a spurious component, resulting in an undesirable increase in errors in the transmitted signal. In this explanation, we have explained the so-called non-coherent case of the synthesizer, but even in the coherent case, the same type of phenomenon can occur depending on how the circuit is configured, and this is a problem that can occur in any case. .
本考案の目的は、高速シンセサイザの出力信号
切換時間帯又は任意の時間帯だけその出力信号を
遮断又は必要なだけ減衰することにより、前記切
換時間中の二周波数成分の共存などの問題点を除
去した周波数ホツピング送受信装置を提供するこ
とにある。 The purpose of the present invention is to eliminate problems such as the coexistence of two frequency components during the switching time by blocking or attenuating the output signal of a high-speed synthesizer only during the switching time or an arbitrary time. An object of the present invention is to provide a frequency hopping transmitting/receiving device.
本考案の構成は、周波数を予め定めた符号によ
りホツプして信号を伝送する周波数ホツピング送
受信装置において、送信側に周波数合成手段で生
成される周波数ホツピング信号の所定周波数切換
時間帯だけ送信信号を減衰させて出力する送信不
要波抑圧回路を備え、受信側に受信された周波数
ホツピング信号の所定周波数切換時間帯だけ受信
信号を減衰させる受信不要波抑圧回路を備えるこ
とを特徴とする。 The configuration of the present invention is that in a frequency hopping transmitter/receiver that transmits a signal by hopping frequencies according to a predetermined code, the transmitting side attenuates the transmitted signal for a predetermined frequency switching time period of the frequency hopping signal generated by the frequency synthesis means. The present invention is characterized in that it is equipped with a transmission unnecessary wave suppression circuit that outputs the frequency hopping signal, and a reception unnecessary wave suppression circuit that attenuates the received signal only in a predetermined frequency switching time period of the received frequency hopping signal on the receiving side.
次に本考案の実施例につき図面を参照して説明
する。 Next, embodiments of the present invention will be described with reference to the drawings.
第２図は本考案の実施例のブロツク図である。
この実施例において、送信機は、周波数ホツピン
グさせる符号発生器１、この発生符号によつて切
換えられる高速シンセサイザ２、この高速シンセ
サイザ２の出力信号を送信周波数帯に変換する周
波数変換器３、この周波数変換器３の出力から不
要信号を除去する不要波抑圧回路４及び電力増幅
器５から構成され、又受信機は、RF増幅器６、
逆拡散及び検波機能を含む検波器７、同期部８、
逆拡散するため送信機と同じ符号を発生する符号
発生器９、高速シンセサイザ１０、及びこの高速
シンセサイザ１０から送出される不要信号を除去
する不要波抑圧回路１１から構成されている。 FIG. 2 is a block diagram of an embodiment of the present invention.
In this embodiment, the transmitter includes a code generator 1 for frequency hopping, a high-speed synthesizer 2 switched by the generated code, a frequency converter 3 for converting the output signal of the high-speed synthesizer 2 into a transmission frequency band, and a frequency converter 3 for converting the output signal of the high-speed synthesizer 2 into a transmission frequency band. It consists of an unnecessary wave suppression circuit 4 that removes unnecessary signals from the output of the converter 3 and a power amplifier 5, and the receiver includes an RF amplifier 6,
A detector 7 including despreading and detection functions, a synchronization unit 8,
It is comprised of a code generator 9 that generates the same code as the transmitter for despreading, a high-speed synthesizer 10, and an unnecessary wave suppression circuit 11 that removes unnecessary signals sent from the high-speed synthesizer 10.
送信機の符号発生器１により発生された符号は
高速シンセサイザ２に送られ、高速シンセサイザ
２では、符号に順じて出力信号の周波数をホツプ
させる。この切換周期は符号の１ビツトの周期と
同じであるため高速の符号速度を用いる場合は、
その速度に十分対応できる切換速度を持つ高速の
シンセサイザーが必要となる。この高速切換信号
のトランジエント等により雑音や不要波を発生
し、周波数ホツピング通信方式の性能を劣化させ
る。これらの不要信号は、高速の符号になるなど
信号の持続時間帯と切換時間帯との比が少さくな
り周波数ホツピング通信方式の性能上に大きな悪
影響を及ぼすことになる。 The code generated by the code generator 1 of the transmitter is sent to a high speed synthesizer 2, which hops the frequency of the output signal in accordance with the code. This switching period is the same as the period of one bit of the code, so when using a high code speed,
A high-speed synthesizer with a switching speed sufficient to handle this speed is required. The transients of this high-speed switching signal generate noise and unnecessary waves, which deteriorate the performance of the frequency hopping communication system. These unnecessary signals become high-speed codes, and the ratio between the signal duration time period and the switching time period becomes small, and this has a large adverse effect on the performance of the frequency hopping communication system.
このため本考案においては、第３図ａに示す符
号切換に対応して、送信周波数帯に変換された高
速シンセサイザ出力信号を、第３図ｂに示すよう
な切換時間帯、又は任意の時間帯だけ断又は必要
なだけ減衰させ、これによつて第３図ｃに示すよ
うにこれらの不要信号を抑圧するようにしたもの
である。 Therefore, in the present invention, in response to the code switching shown in FIG. 3a, the high-speed synthesizer output signal converted to the transmission frequency band is transferred to the switching time period shown in FIG. 3b, or any time period. The signal is cut off or attenuated as necessary, thereby suppressing these unnecessary signals as shown in FIG. 3c.
第４図は第２図の不要波抑圧回路の一例の回路
図である。この回路は第２図に示すように符号発
生器１からパルス受け遅延回路又はタイミング生
成回路により生成され第３図ｂに示す切換時間帯
のみ−5Vとなるパルスを信号除去パルスとして
受ける。この信号除去パルスによりダイオード
D3，D4，D7，D8は導通となつてＡ，Ｂ間がシヨ
ート状態となり、又ダイオードD1，D2，D5，D6
は非導通状態となり、入力信号が出力側に現われ
なくなる。又信号持続状態では信号除去パルスが
＋5Vとなりこれらダイオードが逆の状態となつ
て入力信号が出力側に現われる。このように不要
波除去回路４を通すことにより、第３図ｃに示す
ように、送信機からの不要波を除去又は低減する
ことが出きる。 FIG. 4 is a circuit diagram of an example of the unnecessary wave suppression circuit of FIG. 2. This circuit receives, as a signal removal pulse, a pulse generated by a pulse reception delay circuit or a timing generation circuit from the code generator 1 as shown in FIG. 2, and which becomes -5V only in the switching time period shown in FIG. 3b. This signal removal pulse causes the diode to
D 3 , D 4 , D 7 , D 8 become conductive, and a short state occurs between A and B, and diodes D 1 , D 2 , D 5 , D 6
becomes non-conductive, and the input signal no longer appears on the output side. Also, in the signal sustaining state, the signal removal pulse becomes +5V, these diodes are in the opposite state, and the input signal appears on the output side. By passing the unnecessary waves through the unnecessary wave removal circuit 4 in this manner, unnecessary waves from the transmitter can be removed or reduced, as shown in FIG. 3c.
このようにして生成された周波数ホツピング信
号は、受信機側に入力されると、RF増幅器６で
増幅された後に、送信符号と同一符号で周波数切
換されたローカル信号でミキシングすることによ
り、高帯域に拡散された送信信号をベースバンド
の帯域幅とほぼ等しい狭い帯域に集中される逆拡
散を行い、１波又は多周波のIF信号に置換され
る。さらにこのIF信号は包絡線検波等の検波回
路でベースバンド信号に復調される。又、同期部
８等により完全に送信信号に同期している状態に
なると、第５図ａ，ｂに示すように送信信号と受
信機の高速シンセサイザ等で生成されるローカル
信号とが時間的に完全に一致した状態となる。こ
の同期した状態において第５図ｃに示す検波信号
が得られるが、切換時間帯は前述のように雑音成
分２４となるため検波信号も雑音成分となり、復
調データ信号２３のＳ／Ｎの劣化要因となる。こ
の実施例は、不要信号除去回路１１により、この
時間切換時間帯２２の部分を除去することによ
り、このような雑音成分を除去、抑圧している。
この不要波抑圧回路１１も受信側の符号発生器９
からのパルスを受け遅延回路やタイミング生成回
路により作られた適当な時間幅の信号除去パルス
により駆動される。 When the frequency hopping signal generated in this way is input to the receiver side, it is amplified by the RF amplifier 6, and then mixed with a local signal frequency-switched with the same code as the transmission code. The transmitted signal, which has been spread over the IF signal, is despread to be concentrated in a narrow band approximately equal to the baseband bandwidth, and is replaced with a single-wave or multi-frequency IF signal. Furthermore, this IF signal is demodulated into a baseband signal by a detection circuit such as envelope detection. Furthermore, when the synchronization unit 8 etc. completely synchronizes with the transmitted signal, the transmitted signal and the local signal generated by the receiver's high-speed synthesizer etc. are temporally synchronized, as shown in Figure 5 a and b. It will be in a completely consistent state. In this synchronized state, the detected signal shown in FIG. becomes. In this embodiment, such noise components are removed and suppressed by removing the portion of this time switching period 22 by the unnecessary signal removal circuit 11.
This unnecessary wave suppression circuit 11 is also connected to the code generator 9 on the receiving side.
It is driven by a signal removal pulse of an appropriate time width generated by a delay circuit or a timing generation circuit in response to a pulse from the circuit.
本考案の不要波抑圧回路を用いることにより、
送信機からの不要波送出の除去又は低減が出来、
また受信機における検波信号のＳ／Ｎ劣化の抑圧
する効果がある。 By using the unnecessary wave suppression circuit of this invention,
Eliminates or reduces unnecessary waves emitted from the transmitter,
It also has the effect of suppressing S/N deterioration of the detected signal in the receiver.
第１図ａ〜ｄは従来の周波数ホツピング通信方
式の周波数切換時における信号1，2の状態を示
すタイムチヤート、第２図は本考案の実施例のブ
ロツク図、第３図ａ〜ｃは第２図の送信部の動作
波形図、第４図は第２図の不要波抑圧回路の回路
図第５図ａ〜ｃは第２図の受信部の動作波形図で
ある。図において、
１……符号発生器、２……高速シンセサイザ、
４……不要波抑圧回路、３……周波数変換器、５
……電力増幅器、６……RF増幅器、７……検波
器、８……同期部、９……符号発生器、１０……
高速シンセサイザ、１１……不要波抑圧回路、１
２……信号除去パルス、１３……高速シンセサイ
ザ出力信号、２２……ホツピング信号の１例、２
３……検波信号、２４……検波信号に含む雑音信
号、D1〜D8……ダイオード、T1，T2……トラン
スである。
Figures 1a to d are time charts showing the states of signals 1 and 2 during frequency switching in the conventional frequency hopping communication system, Figure 2 is a block diagram of an embodiment of the present invention, and Figures 3a to c are time charts showing the states of signals 1 and 2 during frequency switching in the conventional frequency hopping communication system. 2, FIG. 4 is a circuit diagram of the unnecessary wave suppression circuit of FIG. 2, and FIGS. 5 a to 5 c are operational waveform diagrams of the receiving section of FIG. 2. In the figure, 1... code generator, 2... high speed synthesizer,
4...Unwanted wave suppression circuit, 3...Frequency converter, 5
... Power amplifier, 6 ... RF amplifier, 7 ... Detector, 8 ... Synchronization section, 9 ... Code generator, 10 ...
High-speed synthesizer, 11...Unwanted wave suppression circuit, 1
2... Signal removal pulse, 13... High speed synthesizer output signal, 22... An example of hopping signal, 2
3...detection signal, 24...noise signal included in the detection signal, D1 to D8 ...diodes, T1 , T2 ...transformers.
Claims (1)
を伝送する周波数ホツピング送受信装置におい
て、送信側に周波数合成手段で生成される周波数
ホツピング信号の所定周波数切換時間帯だけ送信
信号を減衰させて出力する送信不要波抑圧回路を
備え、受信側に受信された周波数ホツピング信号
の所定周波数切換時間帯だけ受信信号を減衰させ
る受信不要波抑圧回路を備えることを特徴とする
周波数ホツピング送受信装置。 In a frequency hopping transmitting/receiving device that transmits a signal by hopping the frequency using a predetermined code, the transmitting side attenuates the transmitted signal only during a predetermined frequency switching time period of the frequency hopping signal generated by the frequency synthesizing means and outputs the signal.No transmission is required. What is claimed is: 1. A frequency hopping transmitting/receiving device, comprising a wave suppression circuit, and a reception unnecessary wave suppression circuit that attenuates a received signal only during a predetermined frequency switching time period of a received frequency hopping signal on a receiving side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982039211U JPS58141646U (en) | 1982-03-19 | 1982-03-19 | Frequency hopping transmitter/receiver |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1982039211U JPS58141646U (en) | 1982-03-19 | 1982-03-19 | Frequency hopping transmitter/receiver |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58141646U JPS58141646U (en) | 1983-09-24 |
| JPH018045Y2 true JPH018045Y2 (en) | 1989-03-02 |
Family
ID=30050506
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1982039211U Granted JPS58141646U (en) | 1982-03-19 | 1982-03-19 | Frequency hopping transmitter/receiver |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58141646U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009099052A1 (en) * | 2008-02-04 | 2009-08-13 | Nec Corporation | Signal processing circuit, signal processing method and recording medium |
-
1982
- 1982-03-19 JP JP1982039211U patent/JPS58141646U/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009099052A1 (en) * | 2008-02-04 | 2009-08-13 | Nec Corporation | Signal processing circuit, signal processing method and recording medium |
| JPWO2009099052A1 (en) * | 2008-02-04 | 2011-05-26 | 日本電気株式会社 | Signal processing circuit, signal processing method, and recording medium |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58141646U (en) | 1983-09-24 |
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