JP2002158599A - Transmission and reception circuit - Google Patents
Transmission and reception circuitInfo
- Publication number
- JP2002158599A JP2002158599A JP2000353333A JP2000353333A JP2002158599A JP 2002158599 A JP2002158599 A JP 2002158599A JP 2000353333 A JP2000353333 A JP 2000353333A JP 2000353333 A JP2000353333 A JP 2000353333A JP 2002158599 A JP2002158599 A JP 2002158599A
- Authority
- JP
- Japan
- Prior art keywords
- reception
- circuit
- noise
- transmission
- wave
- 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
- 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
- H04B1/38—Transceivers, i.e. devices in which transmitter and receiver form a structural unit and in which at least one part is used for functions of transmitting and receiving
- H04B1/40—Circuits
- H04B1/50—Circuits using different frequencies for the two directions of communication
- H04B1/52—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa
- H04B1/525—Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa with means for reducing leakage of transmitter signal into the receiver
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Transceivers (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、移動体通信機など
に使用される送受信回路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a transmission / reception circuit used for a mobile communication device or the like.
【０００２】[0002]
【従来の技術】従来の送受信回路を備えた従来の移動体
通信機の回路構成を図３に示す。この回路構成において
は、ディジタル回路（情報処理回路）１１から出力され
た信号により変調されて送信アナログ回路１２より生成
された上り送信波Ｕｐが、デュプレクサ１３の送信入力
−アンテナ入出力ポート間を通過してアンテナ１４に供
給され、このアンテナ１４より基地局２１に向けて放射
される。一方、基地局２１から放射された下り送信波Ｄ
ｎは、上り送信波Ｕｐと周波数が異なるため、アンテナ
１４で受信された後、デュプレクサ１３のアンテナ入出
力−受信出力ポート間を通過して受信アナログ回路１５
に供給され、この受信アナログ回路１５で周波数変換と
増幅が行われた後、復調のためディジタル回路１１に供
給される。2. Description of the Related Art FIG. 3 shows a circuit configuration of a conventional mobile communication device having a conventional transmission / reception circuit. In this circuit configuration, the upstream transmission wave Up generated by the transmission analog circuit 12 after being modulated by the signal output from the digital circuit (information processing circuit) 11 passes between the transmission input of the duplexer 13 and the antenna input / output port. The signal is supplied to the antenna 14 and radiated from the antenna 14 toward the base station 21. On the other hand, the downlink transmission wave D radiated from the base station 21
n is different in frequency from the upstream transmission wave Up, so that the signal n is received by the antenna 14 and then passes between the antenna input / output and the reception output port of the duplexer 13 to receive the analog signal 15
After the frequency conversion and amplification are performed by the receiving analog circuit 15, the signal is supplied to the digital circuit 11 for demodulation.
【０００３】[0003]
【発明が解決しようとする課題】上記のような移動体通
信機において、基地局２１から放射された下り送信波Ｄ
ｎはデュプレクサ１３のアンテナ入力と受信出力ポート
間を通過するが、上り送信波Ｕｐは下り送信波Ｄｎと周
波数が異なるため、アンテナ入出力と受信出力ポート間
で減衰される。しかし、上り送信波Ｕｐを放射するのと
同時に下り送信波Ｄｎを受信する場合、上り送信波Ｕｐ
の一部は、デュプレクサ１３の送信入力ポートから受信
出力ポートを通して受信アナログ回路１５に漏れ波とし
て受信される。In the above-described mobile communication device, the downlink transmission wave D radiated from the base station 21 is used.
Although n passes between the antenna input and the reception output port of the duplexer 13, the uplink transmission wave Up is attenuated between the antenna input / output and the reception output port because the frequency of the uplink transmission wave Up is different from that of the downlink transmission wave Dn. However, when the downlink transmission wave Dn is received simultaneously with the emission of the uplink transmission wave Up, the uplink transmission wave Up
Is received by the reception analog circuit 15 from the transmission input port of the duplexer 13 through the reception output port as a leaky wave.
【０００４】上り送信波Ｕｐは通信距離を拡大するため
扱う電力が大きいため、下り送信波Ｄｎの周波数帯域
（受信帯域）を含む広い周波数範囲にわたってノイズを
含んでいる。したがって、漏れ波も、受信帯域を含む広
い周波数範囲にわたってノイズを含む。Since the uplink transmission wave Up has a large power to handle in order to extend the communication distance, it includes noise over a wide frequency range including the frequency band (reception band) of the downlink transmission wave Dn. Therefore, the leaky wave also includes noise over a wide frequency range including the reception band.
【０００５】漏れ波に含まれる上り送信波Ｕｐの周波数
帯域の信号は、他の不要周波数帯域の信号とともに、受
信性能を維持するため、受信アナログ回路１５内にある
図示しないフィルタで減衰される。しかし、漏れ波に含
まれる受信帯域のノイズは、受信アナログ回路１５内に
あるフィルタで減衰することができない。そして、減衰
されることなく受信アナログ回路１５で受信された受信
帯域の漏れ波のノイズは、受信アナログ回路１５のＳ／
Ｎ比の劣化の原因となる。すると、下り送信波Ｄｎは移
動体通信機で受信すべき正式な信号であっても、Ｓ／Ｎ
比の劣化によりディジタル回路１１で復調できる充分な
Ｓ／Ｎ比が得られないため、受信情報として認識されな
い場合がある。結果として、受信帯域の漏れ波のノイズ
による受信アナログ回路１５のＳ／Ｎ比の劣化は、本来
目標とされる受信性能が得られない原因となる。The signal in the frequency band of the upstream transmission wave Up included in the leak wave is attenuated by a filter (not shown) in the reception analog circuit 15 in order to maintain the reception performance together with the signals in other unnecessary frequency bands. However, the noise in the reception band included in the leak wave cannot be attenuated by the filter in the reception analog circuit 15. Then, the noise of the leaky wave in the reception band received by the reception analog circuit 15 without being attenuated is S / S of the reception analog circuit 15.
It causes deterioration of the N ratio. Then, even if the downlink transmission wave Dn is a formal signal to be received by the mobile communication device, the S / N
Since a sufficient S / N ratio that can be demodulated by the digital circuit 11 cannot be obtained due to the deterioration of the ratio, it may not be recognized as received information. As a result, the deterioration of the S / N ratio of the reception analog circuit 15 due to the noise of the leaky wave in the reception band causes the reception performance originally not to be obtained.
【０００６】本発明は上記の点に鑑みなされたもので、
漏れ波（広い意味では送信波）に含まれる受信帯域のノ
イズを受信回路から除去することにより受信性能の維
持、改善を図ることができる送受信回路を提供すること
を目的とする。[0006] The present invention has been made in view of the above points,
An object of the present invention is to provide a transmission / reception circuit capable of maintaining and improving reception performance by removing noise in a reception band included in a leaky wave (a transmission wave in a broad sense) from a reception circuit.
【０００７】[0007]
【課題を解決するための手段】本発明の送受信回路は、
送信波を生成する送信回路と、受信波を受信する受信回
路と、前記送信回路から前記送信波の一部を取出す手段
と、この手段により取出された送信波の一部から受信帯
域のノイズを取出し、そのノイズを前記受信回路に入力
させることにより、前記受信回路の受信信号中に混入し
た前記送信波に含まれる受信帯域のノイズを相殺除去す
るノイズ除去回路とを具備することを特徴とする。A transmitting / receiving circuit according to the present invention comprises:
A transmission circuit that generates a transmission wave, a reception circuit that receives a reception wave, a unit that extracts a part of the transmission wave from the transmission circuit, and a noise in a reception band from a part of the transmission wave that is extracted by the unit. And a noise removing circuit that cancels and removes noise in a receiving band included in the transmission wave mixed in a received signal of the receiving circuit by taking out and inputting the noise to the receiving circuit. .
【０００８】上記送受信回路において、ノイズ除去回路
は、具体的には、送信回路から取出された送信波の一部
から受信帯域のノイズを取出すフィルタと、このフィル
タで取出された受信帯域のノイズのレベルを調整するレ
ベル調整器と、前記フィルタで取出された前記受信帯域
のノイズの位相を調整する位相調整器と、受信回路内に
設けられ、レベルおよび位相が調整された前記受信帯域
のノイズと受信信号とを加算する加算器とからなる。In the transmission / reception circuit, the noise elimination circuit includes, specifically, a filter for extracting noise in a reception band from a part of the transmission wave extracted from the transmission circuit, and a filter for noise in the reception band extracted by the filter. A level adjuster that adjusts a level, a phase adjuster that adjusts the phase of the noise in the reception band extracted by the filter, and a noise in the reception band in which a level and a phase are adjusted, provided in a reception circuit. And an adder for adding the received signal.
【０００９】[0009]
【発明の実施の形態】次に添付図面を参照して本発明に
よる送受信回路の実施の形態を詳細に説明する。図１
は、本発明の送受信回路の実施の形態を備えた移動体通
信機の回路構成を示すブロック図である。この移動体通
信機は、ディジタル回路（情報処理回路）３１と、送信
アナログ回路４０と、デュプレクサ３２と、アンテナ３
３と、受信アナログ回路５０と、上り送信波取出し部３
４と、ノイズ除去回路６０とを備える。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram showing an embodiment of a transmission / reception circuit according to the present invention. FIG.
FIG. 1 is a block diagram illustrating a circuit configuration of a mobile communication device including a transmitting / receiving circuit according to an embodiment of the present invention. The mobile communication device includes a digital circuit (information processing circuit) 31, a transmission analog circuit 40, a duplexer 32, an antenna 3
3, reception analog circuit 50, and upstream transmission wave extracting unit 3
4 and a noise removing circuit 60.
【００１０】送信アナログ回路４０は、デジタル回路３
１からの信号により変調等を行う前段回路４１と、途中
段あるいは終段の増幅器４２とを少なくとも有し、上り
送信波Ｕｐを生成する。この上り送信波Ｕｐは、デュプ
レクサ３２の送信入力−アンテナ入出力ポート間を通過
してアンテナ３３に供給され、このアンテナ３３より基
地局７１に向けて放射される。The transmission analog circuit 40 includes a digital circuit 3
It has at least a pre-stage circuit 41 for performing modulation or the like with the signal from the first stage and an amplifier 42 at an intermediate stage or a final stage, and generates an upstream transmission wave Up. The uplink transmission wave Up is supplied to the antenna 33 after passing between the transmission input of the duplexer 32 and the antenna input / output port, and is radiated from the antenna 33 toward the base station 71.
【００１１】受信アナログ回路５０は、初段あるいは途
中段の増幅器５１と、周波数変換等を行う後段回路５２
とを少なくとも有し、基地局７１から放射された下り送
信波Ｄｎをアンテナ３３およびデュプレクサ３２のアン
テナ入出力−受信出力ポート間を介して受信する。この
受信アナログ回路５０から出力された信号は復調などの
ためデジタル回路３１に供給される。A receiving analog circuit 50 includes an initial stage or intermediate stage amplifier 51 and a subsequent stage circuit 52 for performing frequency conversion and the like.
And receives the downlink transmission wave Dn radiated from the base station 71 via the antenna 33 and the antenna input / output-reception output port of the duplexer 32. The signal output from the reception analog circuit 50 is supplied to the digital circuit 31 for demodulation and the like.
【００１２】上り送信波取出し部３４はカプラあるいは
分波器からなり、送信アナログ回路４０の増幅器４２出
力に設けられ、送信アナログ回路４０で生成される上り
送信波Ｕｐの一部を取出す。The upstream transmission wave extracting section 34 is composed of a coupler or a duplexer, is provided at the output of the amplifier 42 of the transmission analog circuit 40, and extracts a part of the upstream transmission wave Up generated by the transmission analog circuit 40.
【００１３】ノイズ除去回路６０は、受信アナログ回路
５０の受信信号中に混入した上り送信波Ｕｐ（漏れ波）
に含まれる受信帯域のノイズを除去するもので、上り送
信波取出し部３４で取出された上り送信波Ｕｐの一部か
ら受信帯域のノイズを取出すフィルタ６１と、このフィ
ルタ６１の出力に接続されこのフィルタ６１で取出され
た受信帯域のノイズのレベルを調整するレベル調整器６
２と、このレベル調整器６２の出力に接続され、レベル
調整された受信帯域のノイズの位相を調整する位相調整
器６３と、受信アナログ回路５０の増幅器５１出力に挿
入され、前記レベル調整器６２と前記位相調整器６３で
レベルと位相が調整された受信帯域のノイズが第２入力
に供給される（第１入力には受信アナログ回路５０の増
幅器５１出力信号が供給される）加算器６４とからな
る。加算器６４の出力は受信アナログ回路５０の後段回
路５２の入力に接続される。The noise elimination circuit 60 includes an upstream transmission wave Up (leakage wave) mixed in the reception signal of the reception analog circuit 50.
And a filter 61 for extracting the noise in the reception band from a part of the uplink transmission wave Up extracted by the uplink transmission wave extraction unit 34. The filter 61 is connected to the output of the filter 61. Level adjuster 6 for adjusting the level of noise in the reception band extracted by filter 61
2, a phase adjuster 63 connected to the output of the level adjuster 62 to adjust the phase of the noise in the level-adjusted reception band, and the phase adjuster 63 inserted into the output of the amplifier 51 of the receive analog circuit 50, And an adder 64 in which the noise in the reception band whose level and phase have been adjusted by the phase adjuster 63 is supplied to the second input (the output signal of the amplifier 51 of the reception analog circuit 50 is supplied to the first input). Consists of The output of the adder 64 is connected to the input of the post-stage circuit 52 of the reception analog circuit 50.
【００１４】上記のように構成された移動体通信機で
は、送信アナログ回路４０により生成された上り送信波
Ｕｐがデュプレクサ３２の送信入力−アンテナ入出力ポ
ート間を通過してアンテナ３３に供給され、このアンテ
ナ３３より基地局７１に向けて放射される。一方、基地
局７１から放射された下り送信波Ｄｎは、上り送信波Ｕ
ｐと周波数が異なるため、アンテナ３３で受信された
後、デュプレクサ３２のアンテナ入出力−受信出力ポー
ト間を通過して受信アナログ回路５０に供給され、この
受信アナログ回路５０で周波数変換と増幅が行われた
後、復調のためディジタル回路３１に供給される。In the mobile communication device configured as described above, the upstream transmission wave Up generated by the transmission analog circuit 40 is supplied to the antenna 33 after passing between the transmission input and the antenna input / output port of the duplexer 32, The light is radiated from the antenna 33 toward the base station 71. On the other hand, the downlink transmission wave Dn radiated from the base station 71 is
Since the signal p and the frequency are different from each other, the signal is received by the antenna 33 and then passed between the antenna input / output and the reception output port of the duplexer 32 and supplied to the reception analog circuit 50. The reception analog circuit 50 performs frequency conversion and amplification. After that, it is supplied to a digital circuit 31 for demodulation.
【００１５】また、上記のような移動体通信機では、上
り送信波Ｕｐを放射するのと同時に下り送信波Ｄｎ（受
信波）を受信する場合、上り送信波Ｕｐの一部がデュプ
レクサ３２の送信入力ポートから受信出力ポートを通し
て受信アナログ回路５０に漏れ波として受信されること
がある。しかし、漏れ波に含まれる受信帯域のノイズ
は、上り送信波取出し部３４とノイズ除去回路６０とに
より次のようにして受信アナログ回路５０の受信信号中
から除去される。In the mobile communication device as described above, when the downlink transmission wave Dn (received wave) is received simultaneously with the emission of the uplink transmission wave Up, a part of the uplink transmission wave Up is transmitted by the duplexer 32. The signal may be received as a leaky wave from the input port to the reception analog circuit 50 through the reception output port. However, the noise in the reception band included in the leaky wave is removed from the reception signal of the reception analog circuit 50 by the upstream transmission wave extraction unit 34 and the noise removal circuit 60 as follows.
【００１６】すなわち、送信アナログ回路４０の増幅器
４２の出力から上り送信波Ｕｐの一部が上り送信波取出
し部３４により取出される。そして、取出された上り送
信波Ｕｐの一部がノイズ除去回路６０にあるフィルタ６
１を通過することにより、フィルタ６１の出力には上り
送信波Ｕｐ（漏れ波）に含まれる受信帯域のノイズのみ
が取出される。そして、取出された受信帯域のノイズ
は、受信アナログ回路５０の受信信号中に混入される漏
れ波に含まれる受信帯域のノイズと同一レベル、逆位相
となるようにレベルと位相がレベル調整器６２と位相調
整器６３で調整された後、受信アナログ回路５０の増幅
器５１出力に挿入された加算器６４に供給される。した
がって、受信アナログ回路５０の受信信号中に混入され
ている漏れ波に含まれる受信帯域のノイズは、加算器６
４により、ノイズ除去回路６０からのノイズにより相殺
除去される。その結果、受信アナログ回路５０の出力に
はノイズのない清浄な受信信号が出力され、ディジタル
回路３１に供給される。That is, a part of the upstream transmission wave Up is extracted from the output of the amplifier 42 of the transmission analog circuit 40 by the upstream transmission wave extracting unit 34. Then, a part of the extracted upstream transmission wave Up is
As a result, only noise in the reception band included in the upstream transmission wave Up (leakage wave) is extracted from the output of the filter 61. Then, the level of the extracted noise in the reception band is the same as that of the noise in the reception band included in the leakage wave mixed into the reception signal of the reception analog circuit 50, and the phase is adjusted to the opposite phase so as to have a level adjuster 62. After being adjusted by the phase adjuster 63, the signal is supplied to the adder 64 inserted into the output of the amplifier 51 of the reception analog circuit 50. Therefore, the noise in the reception band included in the leak wave mixed in the reception signal of the reception analog circuit 50 is added to the adder 6.
4, the noise is canceled by the noise from the noise elimination circuit 60. As a result, a clean reception signal without noise is output to the output of the reception analog circuit 50 and supplied to the digital circuit 31.
【００１７】したがって、上記の移動体通信機によれ
ば、漏れ波に含まれる受信帯域のノイズを受信アナログ
回路５０から除去して、受信アナログ回路５０の受信性
能の維持、改善を図ることができる。また、デュプレク
サ３２において送信・受信間のアイソレーションに要求
される値を緩和できデュプレクサ３２の選択肢が広くな
り、コストを下げることができる。さらに、受信性能の
劣化が無い（許せる）レベルまで上り送信波Ｕｐの電力
を増加させることができ、通信距離（エリア）を拡大で
きる。さらに、送信側増幅器に要求されるＮＦ（負帰
還）を緩和でき送信側増幅器の選択肢が広くなり、コス
トを下げることができる。Therefore, according to the above-described mobile communication device, the noise in the reception band included in the leak wave is removed from the reception analog circuit 50, and the reception performance of the reception analog circuit 50 can be maintained and improved. . In addition, the value required for the isolation between transmission and reception in the duplexer 32 can be relaxed, the options of the duplexer 32 can be widened, and the cost can be reduced. Further, the power of the uplink transmission wave Up can be increased to a level where the reception performance is not deteriorated (allowed), and the communication distance (area) can be expanded. Further, NF (negative feedback) required for the transmission-side amplifier can be reduced, the options of the transmission-side amplifier can be widened, and the cost can be reduced.
【００１８】なお、図１の構成において、アンテナ結合
器としては、デュプレクサ３２に代えて、複数の入出力
に対してそれぞれの帯域制限を持ったフィルタ、あるい
はサーキュレータ、または方向性結合器を使用すること
ができる。また、加算器６４の位置はＳ／Ｎ比に対して
影響がなければ点線で示すように増幅器５１の入力側で
もよい。さらに、レベル調整器６２と位相調整器６３は
接続順序を逆にすることができる。In the configuration shown in FIG. 1, a filter, a circulator, or a directional coupler having a band limit for each of a plurality of inputs and outputs is used instead of the duplexer 32 as the antenna coupler. be able to. Further, the position of the adder 64 may be on the input side of the amplifier 51 as shown by a dotted line if there is no influence on the S / N ratio. Furthermore, the connection order of the level adjuster 62 and the phase adjuster 63 can be reversed.
【００１９】図２は本発明の他の実施の形態を示す回路
ブロック図である。この他の実施の形態では、送信側ア
ンテナ３３ａと受信側アンテナ３３ｂとを有して、デュ
プレクサを排除して、送信アナログ回路４０と受信アナ
ログ回路５０とがそれぞれ専用のアンテナに直接接続さ
れている。しかし、この場合も、送信側アンテナ３３ａ
と受信側アンテナ３３ｂ間のアイソレーションが足りな
い場合に、上り送信波Ｕｐに含まれる受信帯域のノイズ
が受信アナログ回路５０の受信性能を劣化させるので、
図１に示した実施の形態と同様に上り送信波取出し部３
４とノイズ除去回路６０とを設けて受信アナログ回路５
０の受信信号中のノイズを除去することにより、受信ア
ナログ回路５０の受信性能を維持、改善できる。FIG. 2 is a circuit block diagram showing another embodiment of the present invention. In this other embodiment, the transmission analog circuit 40 and the reception analog circuit 50 are directly connected to dedicated antennas, respectively, with the transmission side antenna 33a and the reception side antenna 33b, eliminating the duplexer. . However, also in this case, the transmitting antenna 33a
When the isolation between the antenna and the receiving-side antenna 33b is insufficient, noise in the receiving band included in the uplink transmission wave Up degrades the receiving performance of the receiving analog circuit 50.
As in the embodiment shown in FIG.
4 and a noise removal circuit 60,
By removing the noise in the 0 received signal, the reception performance of the received analog circuit 50 can be maintained and improved.
【００２０】なお、本発明の送受信回路は、移動体通信
機以外にも業務用あるいは趣味用の固定通信機などに使
用できる。The transmission / reception circuit of the present invention can be used not only for a mobile communication device but also for a fixed communication device for business or hobby use.
【００２１】[0021]
【発明の効果】以上詳細に説明したように本発明の送受
信回路によれば、送信波（漏れ波の意味も含む）に含ま
れる受信帯域のノイズを受信回路から除去して、受信回
路の受信性能の維持、改善を図ることができる。As described above in detail, according to the transmission / reception circuit of the present invention, the noise in the reception band included in the transmission wave (including the meaning of the leaky wave) is removed from the reception circuit, and the reception of the reception circuit is performed. Performance can be maintained and improved.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明による送受信回路の実施の形態を備えた
移動体通信機の回路構成を示すブロック図。FIG. 1 is a block diagram showing a circuit configuration of a mobile communication device including a transmitting / receiving circuit according to an embodiment of the present invention.
【図２】本発明の他の実施の形態を示す回路ブロック
図。FIG. 2 is a circuit block diagram showing another embodiment of the present invention.
【図３】従来の送受信回路を備えた従来の移動体通信機
を示す回路ブロック図。FIG. 3 is a circuit block diagram showing a conventional mobile communication device including a conventional transmission / reception circuit.
３４ 上り送信波取出し部 ４０ 送信アナログ回路 ５０ 受信アナログ回路 ６０ ノイズ除去回路 ６１ フィルタ ６２ レベル調整器 ６３ 位相調整器 ６４ 加算器 34 uplink transmission wave extraction unit 40 transmission analog circuit 50 reception analog circuit 60 noise removal circuit 61 filter 62 level adjuster 63 phase adjuster 64 adder
Claims (2)
ノイズを取出し、そのノイズを前記受信回路に入力させ
ることにより、前記受信回路の受信信号中に混入した前
記送信波に含まれる受信帯域のノイズを相殺除去するノ
イズ除去回路とを具備することを特徴とする送受信回
路。A transmission circuit for generating a transmission wave; a reception circuit for receiving a reception wave; a unit for extracting a part of the transmission wave from the transmission circuit; A noise removal circuit for extracting noise in a reception band and inputting the noise to the reception circuit, thereby canceling and removing noise in the reception band included in the transmission wave mixed in the reception signal of the reception circuit. A transmission / reception circuit, characterized in that:
イズを取出すフィルタと、 このフィルタで取出された受信帯域のノイズのレベルを
調整するレベル調整器と、 前記フィルタで取出された前記受信帯域のノイズの位相
を調整する位相調整器と、 受信回路内に設けられ、レベルおよび位相が調整された
前記受信帯域のノイズと受信信号とを加算する加算器と
からなることを特徴とする請求項１に記載の送受信回
路。2. A noise removal circuit comprising: a filter for extracting noise in a reception band from a part of a transmission wave extracted from a transmission circuit; a level adjuster for adjusting a level of noise in a reception band extracted by the filter; A phase adjuster that adjusts a phase of noise in the reception band extracted by the filter; and an adder that is provided in a reception circuit and adds the reception signal and the noise in the reception band whose level and phase are adjusted. The transmission / reception circuit according to claim 1, comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000353333A JP2002158599A (en) | 2000-11-20 | 2000-11-20 | Transmission and reception circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000353333A JP2002158599A (en) | 2000-11-20 | 2000-11-20 | Transmission and reception circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2002158599A true JP2002158599A (en) | 2002-05-31 |
Family
ID=18826110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000353333A Pending JP2002158599A (en) | 2000-11-20 | 2000-11-20 | Transmission and reception circuit |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2002158599A (en) |
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007080641A1 (en) * | 2006-01-12 | 2007-07-19 | Mitsubishi Denki Kabushiki Kaisha | Transmission wave remover |
| JP2008278417A (en) * | 2007-05-07 | 2008-11-13 | Ntt Docomo Inc | Leak power reducing device and reduction method |
| US7778611B2 (en) | 2006-05-29 | 2010-08-17 | Tokyo Institute Of Technology | Radio communication apparatus and radio communication method |
| US8233872B2 (en) * | 2006-04-03 | 2012-07-31 | Brother Kogyo Kabushiki Kaisha | Radio-frequency communication device |
| JP2014096671A (en) * | 2012-11-08 | 2014-05-22 | Taiyo Yuden Co Ltd | Switching device and module |
| JP2014120841A (en) * | 2012-12-14 | 2014-06-30 | Panasonic Corp | Electronic component |
| US9246533B2 (en) | 2012-10-18 | 2016-01-26 | Skyworks Panasonic Filter Solutions Japan Co., Ltd. | Electronic device including filter |
| US10135422B2 (en) | 2015-10-01 | 2018-11-20 | Skyworks Filter Solutions Japan Co., Ltd. | Filter devices having improved attenuation characteristics |
| US10404234B2 (en) | 2016-09-02 | 2019-09-03 | Skyworks Filter Solutions Japan Co., Ltd. | Filter device with phase compensation, and electronic devices including same |
| US10476482B2 (en) | 2016-11-29 | 2019-11-12 | Skyworks Solutions, Inc. | Filters including loop circuits for phase cancellation |
| US11038487B2 (en) | 2018-07-18 | 2021-06-15 | Skyworks Solutions, Inc. | FBAR filter with integrated cancelation circuit |
-
2000
- 2000-11-20 JP JP2000353333A patent/JP2002158599A/en active Pending
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007080641A1 (en) * | 2006-01-12 | 2007-07-19 | Mitsubishi Denki Kabushiki Kaisha | Transmission wave remover |
| US8233872B2 (en) * | 2006-04-03 | 2012-07-31 | Brother Kogyo Kabushiki Kaisha | Radio-frequency communication device |
| US7778611B2 (en) | 2006-05-29 | 2010-08-17 | Tokyo Institute Of Technology | Radio communication apparatus and radio communication method |
| JP2008278417A (en) * | 2007-05-07 | 2008-11-13 | Ntt Docomo Inc | Leak power reducing device and reduction method |
| US9246533B2 (en) | 2012-10-18 | 2016-01-26 | Skyworks Panasonic Filter Solutions Japan Co., Ltd. | Electronic device including filter |
| US9520857B2 (en) | 2012-10-18 | 2016-12-13 | Skyworks Filter Solutions Japan Co., Ltd. | Electronic device including filter |
| US9722573B2 (en) | 2012-10-18 | 2017-08-01 | Skyworks Filter Solutions Japan Co., Ltd. | High frequency filter with phase compensating circuit |
| JP2014096671A (en) * | 2012-11-08 | 2014-05-22 | Taiyo Yuden Co Ltd | Switching device and module |
| JP2014120841A (en) * | 2012-12-14 | 2014-06-30 | Panasonic Corp | Electronic component |
| US10135422B2 (en) | 2015-10-01 | 2018-11-20 | Skyworks Filter Solutions Japan Co., Ltd. | Filter devices having improved attenuation characteristics |
| US10404234B2 (en) | 2016-09-02 | 2019-09-03 | Skyworks Filter Solutions Japan Co., Ltd. | Filter device with phase compensation, and electronic devices including same |
| US10476482B2 (en) | 2016-11-29 | 2019-11-12 | Skyworks Solutions, Inc. | Filters including loop circuits for phase cancellation |
| US11038487B2 (en) | 2018-07-18 | 2021-06-15 | Skyworks Solutions, Inc. | FBAR filter with integrated cancelation circuit |
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