BR0016858A - Método para processar sinais i e q produzidos para um modulador digital, circuito de recorte para processar sinais de entrada i e q originais antes de aplicar os mesmos a um modulador digital, e, modulador digital de circuito de recorte - Google Patents
Método para processar sinais i e q produzidos para um modulador digital, circuito de recorte para processar sinais de entrada i e q originais antes de aplicar os mesmos a um modulador digital, e, modulador digital de circuito de recorteInfo
- Publication number
- BR0016858A BR0016858A BR0016858-0A BR0016858A BR0016858A BR 0016858 A BR0016858 A BR 0016858A BR 0016858 A BR0016858 A BR 0016858A BR 0016858 A BR0016858 A BR 0016858A
- Authority
- BR
- Brazil
- Prior art keywords
- vector
- clipping circuit
- modulator
- digital
- limit
- Prior art date
Links
- 238000000034 method Methods 0.000 title 2
- 239000013598 vector Substances 0.000 abstract 16
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/32—Carrier systems characterised by combinations of two or more of the types covered by groups H04L27/02, H04L27/10, H04L27/18 or H04L27/26
- H04L27/34—Amplitude- and phase-modulated carrier systems, e.g. quadrature-amplitude modulated carrier systems
- H04L27/3405—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power
- H04L27/3411—Modifications of the signal space to increase the efficiency of transmission, e.g. reduction of the bit error rate, bandwidth, or average power reducing the peak to average power ratio or the mean power of the constellation; Arrangements for increasing the shape gain of a signal set
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
- Amplitude Modulation (AREA)
- Image Analysis (AREA)
- Baking, Grill, Roasting (AREA)
- Tone Control, Compression And Expansion, Limiting Amplitude (AREA)
Abstract
"MéTODO PARA PROCESSAR SINAIS I E Q PRODUZIDOS PARA UM MODULADOR DIGITAL, CIRCUITO DE RECORTE PARA PROCESSAR SINAIS DE ENTRADA I E Q ORIGINAIS ANTES DE APLICAR OS MESMOS A UM MODULADOR DIGITAL, E, MODULADOR DIGITAL DE CIRCUITO DE RECORTE". As amplitudes de sinais produzidos por um modulador digital podem ser limitadas para que em vez de processar o vetor de saída do modulador digital ou seus vetores componentes, o processamento é aplicado aos sinais I e Q da banda base anteriormente à modulação. Os sinais I e Q são aplicados a uma entrada de um circuito de recorte. Valores limite predeterminados também são aplicados à outra entrada do circuito limitador. O circuito limitador gira o vetor I-Q no sentido do vetor limite. Ao mesmo tempo o vetor limite é girado no sentido do vetor I-Q. Rotações são efetuadas usando o algoritmo CORDIC. Após as rotações terem sido completadas, o vetor I-Q girado é alinhado com o vetor limite original Então o comprimento do vetor I-Q girado será comparado com o vetor limite original. Se o vetor IQ girado é mais curto que o vetor limite, então os sinais I-Q originais são sinais de saída do circuito de recorte. Porém se o vetor I-Q original girado é mais longo que o vetor limite, então os sinais I-Q originais serão rejeitados e substituídos pelos valores coordenados do vetor limite girado.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/FI2000/001099 WO2002049308A1 (en) | 2000-12-14 | 2000-12-14 | Method of clipping signal amplitudes in a modulation system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| BR0016858A true BR0016858A (pt) | 2002-10-01 |
Family
ID=8555886
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| BR0016858-0A BR0016858A (pt) | 2000-12-14 | 2000-12-14 | Método para processar sinais i e q produzidos para um modulador digital, circuito de recorte para processar sinais de entrada i e q originais antes de aplicar os mesmos a um modulador digital, e, modulador digital de circuito de recorte |
Country Status (10)
| Country | Link |
|---|---|
| US (1) | US6879642B2 (pt) |
| EP (1) | EP1252751B1 (pt) |
| JP (1) | JP3638585B2 (pt) |
| CN (1) | CN1158826C (pt) |
| AT (1) | ATE318518T1 (pt) |
| AU (1) | AU2001223770A1 (pt) |
| BR (1) | BR0016858A (pt) |
| DE (1) | DE60026605T2 (pt) |
| ES (2) | ES2260076T3 (pt) |
| WO (1) | WO2002049308A1 (pt) |
Families Citing this family (22)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7346125B2 (en) * | 2002-04-23 | 2008-03-18 | Raytheon Company | Method and device for pulse shaping QPSK signals |
| KR20040028301A (ko) * | 2002-09-30 | 2004-04-03 | 주식회사 현대시스콤 | 아이엠티-2000 시스템에서 클리핑을 위한 매그니튜드산출방법 |
| US7161975B2 (en) * | 2002-11-27 | 2007-01-09 | International Business Machines Corporation | Enhancing CDMA multiuser detection by constraining soft decisions |
| US7545874B1 (en) | 2004-04-05 | 2009-06-09 | National Semiconductor Corporation | Apparatus for pre-scaling data packets with multiple signal gain coefficients in a SIMO/MISO transceiver for communication with a SISO transceiver |
| US7394861B1 (en) * | 2004-04-05 | 2008-07-01 | National Semiconductor Corporation | Apparatus for generating signal gain coefficients for a SIMO/MISO transceiver for providing packet data communication with a SISO transceiver |
| JP4424081B2 (ja) * | 2004-06-14 | 2010-03-03 | ミツミ電機株式会社 | 振幅変調装置及び振幅制限方法並びにコンピュータで読み取り可能なプログラム |
| GB2432981B (en) * | 2005-11-30 | 2007-12-27 | Motorola Inc | Apparatus and method for amplitude variation reduction of a signal |
| CN101237435B (zh) * | 2007-01-30 | 2012-03-28 | 中兴通讯股份有限公司 | 一种降低多载波信号峰均比的方法和装置 |
| CN101483627B (zh) * | 2008-01-07 | 2011-05-11 | 中兴通讯股份有限公司 | 减小多载波信号峰均比的方法 |
| JP2009281883A (ja) * | 2008-05-22 | 2009-12-03 | Toshiba Mach Co Ltd | 速度検出装置およびサーボモータ |
| US8059697B2 (en) * | 2008-07-02 | 2011-11-15 | Telefonaktiebolaget L M Ericsson (Publ) | Reduced peak-to-RMS ratio multicode signal |
| CN102439585B (zh) * | 2009-05-11 | 2015-04-22 | 雅基达布鲁公司 | 从任意信号对提取共同及唯一分量 |
| US8774315B2 (en) * | 2009-08-25 | 2014-07-08 | The Aerospace Corporation | Phase-optimized constant envelope transmission (POCET) method, apparatus and system |
| KR101704021B1 (ko) * | 2009-12-22 | 2017-02-07 | 에릭슨 엘지 주식회사 | 디지털 신호 클리핑 방법 및 그를 위한 장치 |
| CN101917164A (zh) * | 2010-07-16 | 2010-12-15 | 航天恒星科技有限公司 | 一种基于cordic算法的信号处理方法 |
| CN104954094B (zh) * | 2014-03-28 | 2018-01-23 | 华为技术有限公司 | 信号限幅方法和装置 |
| DE102014113922B4 (de) | 2014-09-25 | 2021-10-14 | Apple Inc. | Digital-zu-Analog-Wandler-Schaltungen, Sender und Verfahren zum Erzeugen eines Hochfrequenz-Sendesignals und Verfahren einer Digital-zu-Analog-Umwandlung |
| US9985811B2 (en) * | 2016-09-23 | 2018-05-29 | Intel IP Corporation | PAPR reduction for IQ RFDAC |
| KR20200015738A (ko) | 2017-06-09 | 2020-02-12 | 나노세미, 인크. | 파고율 감소 |
| WO2019094713A1 (en) | 2017-11-13 | 2019-05-16 | Nanosemi, Inc. | Spectrum shaping crest factor reduction |
| US10826739B1 (en) | 2019-08-01 | 2020-11-03 | Nanosemi, Inc. | Systems and methods for efficient clipping in crest factor reduction processes |
| US12155522B2 (en) * | 2023-04-10 | 2024-11-26 | Avago Technologies International Sales Pte. Limited | Dynamic assignment with phase-preserving clipping technique for digital transmitters and power amplifiers |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19824233B4 (de) | 1998-05-29 | 2005-10-06 | Telefonaktiebolaget Lm Ericsson (Publ) | Amplitudenbegrenzung |
| US6192089B1 (en) * | 1998-08-07 | 2001-02-20 | Motorola, Inc. | Electronic circuit and method for automatic frequency control |
| SE514948C2 (sv) * | 1999-03-29 | 2001-05-21 | Ericsson Telefon Ab L M | Förfarande och anordning för att reducera överhörning |
| DE19947019A1 (de) * | 1999-09-30 | 2001-06-07 | Infineon Technologies Ag | Verfahren und Vorrichtung zum Erzeugen von spreizcodierten Signalen |
-
2000
- 2000-11-14 ES ES00981626T patent/ES2260076T3/es not_active Expired - Lifetime
- 2000-11-14 AT AT00981626T patent/ATE318518T1/de not_active IP Right Cessation
- 2000-12-14 JP JP2002550686A patent/JP3638585B2/ja not_active Expired - Fee Related
- 2000-12-14 ES ES00987519T patent/ES2260087T3/es not_active Expired - Lifetime
- 2000-12-14 CN CNB008123187A patent/CN1158826C/zh not_active Expired - Fee Related
- 2000-12-14 WO PCT/FI2000/001099 patent/WO2002049308A1/en not_active Ceased
- 2000-12-14 EP EP00987519A patent/EP1252751B1/en not_active Expired - Lifetime
- 2000-12-14 AU AU2001223770A patent/AU2001223770A1/en not_active Abandoned
- 2000-12-14 US US10/181,173 patent/US6879642B2/en not_active Expired - Lifetime
- 2000-12-14 BR BR0016858-0A patent/BR0016858A/pt not_active IP Right Cessation
- 2000-12-14 DE DE60026605T patent/DE60026605T2/de not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| CN1387718A (zh) | 2002-12-25 |
| DE60026605D1 (de) | 2006-05-04 |
| ES2260076T3 (es) | 2006-11-01 |
| ATE318518T1 (de) | 2006-03-15 |
| EP1252751B1 (en) | 2006-03-08 |
| JP2004516716A (ja) | 2004-06-03 |
| US20020197966A1 (en) | 2002-12-26 |
| ES2260087T3 (es) | 2006-11-01 |
| DE60026605T2 (de) | 2006-08-10 |
| JP3638585B2 (ja) | 2005-04-13 |
| US6879642B2 (en) | 2005-04-12 |
| EP1252751A1 (en) | 2002-10-30 |
| AU2001223770A1 (en) | 2002-06-24 |
| WO2002049308A1 (en) | 2002-06-20 |
| CN1158826C (zh) | 2004-07-21 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| B08F | Application dismissed because of non-payment of annual fees [chapter 8.6 patent gazette] |
Free format text: REFERENTE A 9A E 10A ANUIDADE(S). |
|
| B08K | Patent lapsed as no evidence of payment of the annual fee has been furnished to inpi [chapter 8.11 patent gazette] |
Free format text: REFERENTE AO DESPACHO 8.6 PUBLICADO NA RPI 2112 DE 28/06/2011. |