KR101077412B1 - 주파수 영역 확산 적용의 심볼 기반 랜덤화된 직교 주파수 분할 다중화(ofdm)를 사용하는 데이터 통신 시스템 및 방법 - Google Patents
주파수 영역 확산 적용의 심볼 기반 랜덤화된 직교 주파수 분할 다중화(ofdm)를 사용하는 데이터 통신 시스템 및 방법 Download PDFInfo
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- KR101077412B1 KR101077412B1 KR1020097005295A KR20097005295A KR101077412B1 KR 101077412 B1 KR101077412 B1 KR 101077412B1 KR 1020097005295 A KR1020097005295 A KR 1020097005295A KR 20097005295 A KR20097005295 A KR 20097005295A KR 101077412 B1 KR101077412 B1 KR 101077412B1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L27/00—Modulated-carrier systems
- H04L27/26—Systems using multi-frequency codes
- H04L27/2601—Multicarrier modulation systems
- H04L27/2626—Arrangements specific to the transmitter only
- H04L27/2627—Modulators
- H04L27/2628—Inverse Fourier transform modulators, e.g. inverse fast Fourier transform [IFFT] or inverse discrete Fourier transform [IDFT] modulators
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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
- H04B1/69—Spread spectrum techniques
- H04B1/707—Spread spectrum techniques using direct sequence modulation
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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
- H04B1/69—Spread spectrum techniques
- H04B1/713—Spread spectrum techniques using frequency hopping
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/0007—Code type
- H04J13/004—Orthogonal
- H04J13/0048—Walsh
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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- Digital Transmission Methods That Use Modulated Carrier Waves (AREA)
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Abstract
Description
Claims (10)
- 데이터 심볼들을 고정 또는 가변성 OFDM 심볼 속도에 기반하여 직교 주파수 분할 다중화(OFDM) 통신 신호를 형성하기 위해 서로 직교하는 복수의 다중 부반송파 주파수들로 변조하고 맵핑(map)하며, 변조기 회로 및 고속 푸리에 역변환(IFFT)에 반송파들을 맵핑하는 부반송파 맵퍼 회로를 포함하는 변조 및 맵핑 회로와,순간적인 신호 대 소음 비율을 유지하면서 차단 및 검출 확률을 낮추고, 주파수당 전력(dB/Hz/sec)을 줄이고, 필요한 전송 전력을 낮추기 위해 OFDM 심볼 속도로 각각의 부반송파를 주파수 도약시키는 암호화 알고리즘에 기반하여 상기 변조 및 맵핑 회로에 의사-랜덤 신호를 발생시키는 변조 및 맵핑 회로와 같이 작동하는 의사-랜덤 신호 발생기와,주파수 영역에 걸쳐 상기 다중 부반송파들을 확산시키기 위해 상기 변조 및 맵핑 회로에 작동적으로 연결되는 주파수 영역 확산기 회로를 포함하는 데이터 통신장치.
- 제 1항에 있어서,상기 주파수 영역 확산기 회로는 월시 변환을 적용하고, 주파수 영역에 걸쳐상기 다중 부반송파들을 확산시키도록 작동되는 월시 변환 회로를 포함하는 데이터 통신장치.
- 제 2항에 있어서,상기 월시 변환 회로는 월시 변환에 의해 심볼의 입력 벡터를 적산하도록 동작되는 데이터 통신장치.
- 제 1항에 있어서,상기 주파수 영역 확산기 회로로부터 신호들을 수신하도록 배치되는 고속 푸리에 역변환(IFFT)을 더 포함하는 데이터 통신장치.
- 제 1항에 있어서,상기 의사-랜덤 신호 발생기는, 연속적인 OFDM 심볼들이 동일한 주파수 상에 부반송파들을 전송하지 않도록 상기 암호화 알고리즘에 기반하여 의사-랜덤 신호를 발생시키기 위해 작동하는 데이터 통신장치.
- 고정 또는 가변성 OFDM 심볼 속도에 기반하여 직교 주파수 분할 다중화(OFDM) 통신 신호를 형성하기 위해 서로 직교하는 다중 부반송파들을 통해 통신 데이터를 분배하고,상기 통신 데이터를 변조하고 고속 푸리에 역변환(IFFT)에 반송파들을 맵핑함에 의해 순간적인 신호 대 소음 비율을 유지하면서 차단 및 검출 확률을 낮추고, 주파수당 전력(dB/Hz/sec)을 줄이고, 필요한 전송 전력을 낮추기 위해 OFDM 심볼 속도로 각각의 부반송파를 주파수 도약시키며,주파수 영역에 걸쳐 다중 반송파들을 확산시키며,상기 주파수 도약 부반송파들을 포함하는 통신 신호를 통해 상기 통신 데이터를 전송하는 것을 포함하는 데이터 통신방법.
- 제 6항에 있어서,상기 주파수 영역에 걸쳐 다중 반송파들을 확산시키는 월시 변환이 적용되는 것을 더 포함하는 데이터 통신방법.
- 제 7항에 의하여,월시 변환에 의해 심볼의 입력 벡터를 적산하는 것을 더 포함하는 데이터 통신방법.
- 제 6항에 있어서,고속 푸리에 역변환(IFFT) 이전에 주파수 확산 함수를 적용하는 것을 더 포함하는 데이터 통신방법.
- 제 6항에 있어서,연속하는 OFDM 심볼들이 동일한 주파수 상에서 전송되지 않도록, 암호화 알고리즘에 기반하여 의사-랜덤 신호를 생성시키는 것을 더 포함하는 데이터 통신방법.
Applications Claiming Priority (2)
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US11/464,854 US7649951B2 (en) | 2006-08-16 | 2006-08-16 | System and method for communicating data using symbol-based randomized orthogonal frequency division multiplexing (OFDM) with applied frequency domain spreading |
US11/464,854 | 2006-08-16 |
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KR20090042965A KR20090042965A (ko) | 2009-05-04 |
KR101077412B1 true KR101077412B1 (ko) | 2011-10-26 |
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US (1) | US7649951B2 (ko) |
EP (1) | EP2064849B1 (ko) |
JP (1) | JP5025730B2 (ko) |
KR (1) | KR101077412B1 (ko) |
CN (1) | CN101518005B (ko) |
CA (1) | CA2660793C (ko) |
TW (1) | TWI363542B (ko) |
WO (1) | WO2008022239A1 (ko) |
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2006
- 2006-08-16 US US11/464,854 patent/US7649951B2/en active Active
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- 2007-08-16 EP EP07814151.2A patent/EP2064849B1/en active Active
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WO2008022239A1 (en) | 2008-02-21 |
KR20090042965A (ko) | 2009-05-04 |
US20080043812A1 (en) | 2008-02-21 |
TWI363542B (en) | 2012-05-01 |
EP2064849B1 (en) | 2016-06-22 |
WO2008022239B1 (en) | 2008-04-03 |
CA2660793C (en) | 2013-02-19 |
CN101518005A (zh) | 2009-08-26 |
CA2660793A1 (en) | 2008-02-21 |
JP5025730B2 (ja) | 2012-09-12 |
EP2064849A1 (en) | 2009-06-03 |
JP2010501144A (ja) | 2010-01-14 |
TW200822644A (en) | 2008-05-16 |
US7649951B2 (en) | 2010-01-19 |
CN101518005B (zh) | 2015-05-27 |
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