JP5269614B2 - Vhf/uhf/gsm/gps/bluetooth/コードレス電話におけるトランシーバの開発 - Google Patents
Vhf/uhf/gsm/gps/bluetooth/コードレス電話におけるトランシーバの開発 Download PDFInfo
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- 238000005070 sampling Methods 0.000 claims description 35
- 239000003990 capacitor Substances 0.000 claims description 28
- 238000004891 communication Methods 0.000 claims description 7
- 230000003111 delayed effect Effects 0.000 claims description 5
- JBRZTFJDHDCESZ-UHFFFAOYSA-N AsGa Chemical compound [As]#[Ga] JBRZTFJDHDCESZ-UHFFFAOYSA-N 0.000 claims 1
- 229910001218 Gallium arsenide Inorganic materials 0.000 claims 1
- 229910000577 Silicon-germanium Inorganic materials 0.000 claims 1
- LEVVHYCKPQWKOP-UHFFFAOYSA-N [Si].[Ge] Chemical compound [Si].[Ge] LEVVHYCKPQWKOP-UHFFFAOYSA-N 0.000 claims 1
- 238000000034 method Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 8
- 238000012545 processing Methods 0.000 description 8
- 238000013461 design Methods 0.000 description 6
- 238000001914 filtration Methods 0.000 description 6
- 238000007792 addition Methods 0.000 description 5
- 238000000926 separation method Methods 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 230000010354 integration Effects 0.000 description 4
- 238000012935 Averaging Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007717 exclusion Effects 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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- 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
- H04B1/0003—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain
- H04B1/0007—Software-defined radio [SDR] systems, i.e. systems wherein components typically implemented in hardware, e.g. filters or modulators/demodulators, are implented using software, e.g. by involving an AD or DA conversion stage such that at least part of the signal processing is performed in the digital domain wherein the AD/DA conversion occurs at radiofrequency or intermediate frequency stage
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- 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
- H04B1/06—Receivers
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/16—Multiple-frequency-changing
- H03D7/165—Multiple-frequency-changing at least two frequency changers being located in different paths, e.g. in two paths with carriers in quadrature
-
- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03D—DEMODULATION OR TRANSFERENCE OF MODULATION FROM ONE CARRIER TO ANOTHER
- H03D7/00—Transference of modulation from one carrier to another, e.g. frequency-changing
- H03D7/18—Modifications of frequency-changers for eliminating image frequencies
-
- 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
- H04B1/06—Receivers
- H04B1/16—Circuits
- H04B1/26—Circuits for superheterodyne receivers
- H04B1/28—Circuits for superheterodyne receivers the receiver comprising at least one semiconductor device having three or more electrodes
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Power Engineering (AREA)
- Superheterodyne Receivers (AREA)
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- Noise Elimination (AREA)
Description
f(LO)=4*N*f(IF)、ここでN=1,2,3,..... 等式(1)
ここでNは平均化回数であり、
f(LO)±f(RF)=f(IF) 等式(2)
例えば、f(RF)=2400MHzであり、f(LO)=2477.419MHzであり、f(IF)=77.419MHzである。
このように、サンプリング・ミキサの後、得られるIF信号をLOの8周期の間蓄積する(又は積分する)場合、得られる信号は、IF(77.419MHz)の直交サンプルを表している。即ち、得られるIFは、77.419*4=309.676MHzの間隔で時間サンプルを持つことになる。
スイッチ124A−D及び等式1は、4つのミキサを使用せずに直交積(quadrature products)の生成を可能にしている。もしLOの波形180Aを(C+jD)として解釈可能ならば、そのときコンデンサ122Aでの出力は、ダウンコンバートしフィルタしたIFの1つの直交サンプルであり、A*Cと等価である。同様に、コンデンサ122Bでの出力は、ダウンコンバートしフィルタしたIFの次の直交サンプルであり、A*Dと等価である。同じやり方で、コンデンサ122Cでの出力は、ダウンコンバートしフィルタしたIFの1つの直交サンプルであり、B*Dと等価であり、コンデンサ122Dでの出力は、ダウンコンバートしフィルタしたIFの次の直交サンプルであり、B*Cと等価である。
f(LO)=4*N*f(IF)、ここでN=1,2,3,..... 等式(1)
ここでNは平均化回数であり、
f(LO)±f(RF)=f(IF) 等式(2)
例えば、f(RF)=2400MHzであり、f(LO)=2477.419MHzであり、f(IF)=77.419MHzである。
このように、サンプリング・ミキサの後、得られるIF信号をLOの8周期の間蓄積する(又は積分する)場合、得られる信号は、IF(77.419MHz)の直交サンプルを表している。即ち、得られるIFは、(2477.419/8即ち77.419*4)=309.676MHzのデシメートされた間隔(the decimated interval)で時間サンプルを持つことが可能である。
これらの追加されたセクションは、次の等式を実現している。
(A+jB)*(C’+jD’)=(AC’−BD’)+j(BC’+AD’)等式(3)
ここで、C’及びD’は、LO即ちLO=(C’+jD’)の第3と第4の直交位相を表している。
線240A及び240Bは、複素数乗算したRF入力を表している。同様に、線240C及び240Dは、LOの反対の位相で複素数乗算したRF入力を表している。
線240Aと240Cは逆位相であり、線240Bと240Dは逆位相である。
このように、線240A−Dは、サンプルしたIF信号の直交位相(I,I’,Q,Q’)を表している。
(AC−BD)−(AC’+BD’) ......等式(4)
加算器238Bは次の等式を実現している:
(BC+AD)+(BC’+AD’) ......等式(5)
図5A−Cにおいて、これらの実装は、4つのディファレンサー回路(four differencer circuits)(加算器234A及び234C並びに加算器238A−B)と、2つの追加回路(加算器234B及び234D)と共に示している。ディファレンサー回路(differencer circuits)の数を減らすことは、有利である可能性がある。正と負の項を別々にグループ化することにより、等式3は4つの追加回路と2つのディファレンサー回路(2 differencer circuits)で実現可能である。
Claims (15)
- 増幅器と、
前記増幅器からA信号及びjB信号を受信するよう結合した複数のサンプリング・ミキサであって、前記のミキサは、局部発振器信号を受けるよう結合し、第1の複数のスイッチ及び第2の複数のスイッチと結合した出力を有し、前記第1の複数のスイッチは、前記の局部発振器信号から得たC制御信号を受け、前記第2の複数のスイッチは、前記の発振器信号から得たjD制御信号を受け、前記C制御信号は、前記jD制御信号に関して位相遅延したものであり、前記第1及び第2の複数のスイッチは、全体として、前記のミキサのうち第1のミキサに結合した第1のスイッチ及び第2のスイッチと、前記のミキサのうち第2のミキサに結合した第3のスイッチ及び第4のスイッチとを含み、前記の第1と第4のスイッチは前記C制御信号を受け、前記の第2と第3のスイッチは前記jD制御信号を受ける、前記複数のサンプリング・ミキサと、
前記のミキサから得られる信号を受けるよう結合した複数の積分デバイスと、
前記積分デバイスと結合し、AC−BDの第1の和及びBC+ADの第2の和を供給する複数の加算器と
を備えたデジタル受信機。 - 前記積分デバイスは、複数のサンプリング・コンデンサである、請求項1に記載のデジタル受信機。
- 前記C局部発振器信号及び前記jD局部発振器信号は、4*N*IFの発振器周波数を有し、IFは前記のミキサの出力が供給する中間周波数である、請求項1に記載のデジタル受信器。
- 前記A信号は2400MHzであり、前記B信号は2400MHzであり、前記発振器周波数は2477.419MHzである、請求項3に記載のデジタル受信機。
- 前記の受信機の構成要素は、CMOS、バイ−CMOS、シリコン・ゲルマニウム、ガリウム砒化物のデバイス上に完全に集積した、請求項1に記載のデジタル受信機。
- 前記デジタル受信機は、プログラマブル・ゲート・アレイ上で完全に実装した、請求項1に記載のデジタル受信機。
- 前記第1の和と前記第2の和とを受ける複素数フィルタを更に備えた、請求項1に記載のデジタル受信機。
- 前記第1の複数のスイッチ及び前記第2の複数のスイッチは、全体として、前記のミキサのうち前記第1のミキサに結合した第5のスイッチ及び第6のスイッチと、前記のミキサのうち前記第2のミキサに結合した第7のスイッチ及び第8のスイッチとを含み、前記の第5と第8のスイッチはC’制御信号を受け、前記の第6と第7のスイッチは前記jD’制御信号を受ける、請求項1に記載のデジタル受信機。
- 前記複素数フィルタは、複素数バンドパス・フィルタである、請求項7に記載のデジタル受信機。
- 前記複数の加算器は、減算するよう構成した少なくとも1つの加算器を含む、請求項9に記載のデジタル受信機。
- 前記の第1と第2の和は、直交位相(I,I’,Q,Q’)を表す、請求項1に記載のデジタル受信機。
- ワイヤレス・アプリケーションのためのデジタル回路であって、
増幅器と、
第1のミキサ及び第2のミキサを含む少なくとも1対のデジタル・サンプリング・ミキサであって、前記第1のミキサは、前記増幅器からのA信号を受けるよう結合した第1の入力及び局部発振器信号を受けるよう結合した第2の入力と、第1のスイッチ及び第2のスイッチと結合した出力とを有し、前記第2のミキサは、前記増幅器からのjB信号を受けるよう結合した第1の入力及び局部発振器信号を受けるよう結合した第2の入力と、第3のスイッチ及び第4のスイッチと結合した出力とを有し、前記の第1と第4のスイッチは前記局部発振器信号から得たC制御信号を受け、前記の第2と第3のスイッチは前記局部発振器信号から得たjD制御信号を受け、前記C制御信号は、前記jD制御信号に関して位相遅延したものである、前記少なくとも1対のデジタル・サンプリング・ミキサと、
グラウンドと前記のミキサの個別のミキサとの間に結合したサンプリング・コンデンサの組と、
前記のコンデンサの組と結合した複数のデジタル加算器と、
前記の加算器と結合して、それにより前記の回路は影像排除のための負の周波数の除去を利用する、デジタル複素数フィルタと
を備えたデジタル回路。 - 前記第1の出力及び第2の出力は、I及びQ電流信号を供給する、請求項12に記載のデジタル回路。
- A信号と、jB信号と、C局部発振器信号と、jD局部発振器信号とを複素数乗算するための手段であって、該手段は、第1のミキサ及び第2のミキサを含む少なくとも1対のデジタル・サンプリング・ミキサを含み、前記第1のミキサは、前記A信号を受けるよう結合した第1の入力及び局部発振器信号を受けるよう結合した第2の入力と、第1のスイッチ及び第2のスイッチと結合した出力とを有し、前記第2のミキサは、前記jB信号を受けるよう結合した第1の入力及び局部発振器信号を受けるよう結合した第2の入力と、第3のスイッチ及び第4のスイッチと結合した出力とを有し、前記の第1と第4のスイッチは前記C局部発振器信号を受け、前記の第2と第3のスイッチは前記jD局部発振器信号を受け、前記C局部発振器信号は、前記jD局部発振器信号に関して位相遅延したものである、手段と、
平均AC信号と、平均AD信号と、平均BD信号と、平均BC信号とを供給するための手段と、
前記平均AC信号と前記平均BD信号との第1の和と、前記平均BC信号と前記平均AD信号との第2の和とを供給するための手段と、
前記第1の和と前記第2の和とを受け、影像フリーの出力信号を供給するための手段とを備えたデジタル通信回路。 - 平均AC信号を供給するための前記の手段は、サンプリング・コンデンサの組を備えた、請求項14に記載のデジタル通信回路。
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
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US11/357,472 | 2006-02-17 | ||
US11/357,472 US7519349B2 (en) | 2006-02-17 | 2006-02-17 | Transceiver development in VHF/UHF/GSM/GPS/bluetooth/cordless telephones |
PCT/US2007/004167 WO2007098046A2 (en) | 2006-02-17 | 2007-02-15 | Transceiver development in vhf/uhf/gsm/gps/bluetooth/cordless telephones |
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JP2009527942A JP2009527942A (ja) | 2009-07-30 |
JP5269614B2 true JP5269614B2 (ja) | 2013-08-21 |
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US (2) | US7519349B2 (ja) |
EP (1) | EP1997231B1 (ja) |
JP (1) | JP5269614B2 (ja) |
KR (1) | KR20080095281A (ja) |
WO (1) | WO2007098046A2 (ja) |
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2006
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- 2007-02-15 WO PCT/US2007/004167 patent/WO2007098046A2/en active Application Filing
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EP1997231A4 (en) | 2012-04-04 |
US7979046B2 (en) | 2011-07-12 |
US7519349B2 (en) | 2009-04-14 |
EP1997231A2 (en) | 2008-12-03 |
EP1997231B1 (en) | 2013-05-01 |
WO2007098046A2 (en) | 2007-08-30 |
KR20080095281A (ko) | 2008-10-28 |
WO2007098046A3 (en) | 2008-10-16 |
JP2009527942A (ja) | 2009-07-30 |
US20070197183A1 (en) | 2007-08-23 |
US20090147884A1 (en) | 2009-06-11 |
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