$\require{mediawiki-texvc}$
  • 검색어에 아래의 연산자를 사용하시면 더 정확한 검색결과를 얻을 수 있습니다.
  • 검색연산자
검색도움말
검색연산자 기능 검색시 예
() 우선순위가 가장 높은 연산자 예1) (나노 (기계 | machine))
공백 두 개의 검색어(식)을 모두 포함하고 있는 문서 검색 예1) (나노 기계)
예2) 나노 장영실
| 두 개의 검색어(식) 중 하나 이상 포함하고 있는 문서 검색 예1) (줄기세포 | 면역)
예2) 줄기세포 | 장영실
! NOT 이후에 있는 검색어가 포함된 문서는 제외 예1) (황금 !백금)
예2) !image
* 검색어의 *란에 0개 이상의 임의의 문자가 포함된 문서 검색 예) semi*
"" 따옴표 내의 구문과 완전히 일치하는 문서만 검색 예) "Transform and Quantization"

통합검색

도움말도움말
상세검색 다국어 입력

연합인증

연합인증 가입 기관의 연구자들은 소속기관의 인증정보(ID와 암호)를 이용해 다른 대학, 연구기관, 서비스 공급자의 다양한 온라인 자원과 연구 데이터를 이용할 수 있습니다.

이는 여행자가 자국에서 발행 받은 여권으로 세계 각국을 자유롭게 여행할 수 있는 것과 같습니다.

연합인증으로 이용이 가능한 서비스는 NTIS, DataON, Edison 등이 있습니다.

한번의 인증절차만으로 연합인증 가입 서비스에 추가 로그인 없이 이용이 가능합니다.

다만, 연합인증을 위해서는 최초 1회만 인증 절차가 필요합니다. (회원이 아닐 경우 회원 가입이 필요합니다.)

연합인증 절차는 다음과 같습니다.

최초이용시에는
ScienceON에 로그인 → 연합인증 서비스 접속 → 로그인 (본인 확인 또는 회원가입) → 서비스 이용

그 이후에는
ScienceON 로그인 → 연합인증 서비스 접속 → 서비스 이용

연합인증을 활용하시면 KISTI가 제공하는 다양한 서비스를 편리하게 이용하실 수 있습니다.

특허 상세정보

MyON담기
내보내기 페이스북 공유 카카오톡 공유

Spreading code selection process for equalization in CDMA communications systems

특허상세정보
국가/구분 United States(US) Patent 등록
국제특허분류(IPC7판) H04J-011/00    H04B-007/216    H04B-001/69   
미국특허분류(USC) 370/210; 370/335; 370/342; 370/441; 375/130; 375/146; 375/147; 375/229
출원번호 US-0488736 (2000-01-20)
발명자 / 주소
  • Hudson, John E
출원인 / 주소
  • Nortel Networks Limited
대리인 / 주소
    Barnes & Thornburg
인용정보 피인용 횟수 : 45  인용 특허 : 5
초록

The disclosure relates to wireless communications such as cdma systems where variable orthogonal spreading factors are employed. Code words are selected from a representation known as the orthogonal variable spreading factor (OVSF) tree, which allows code words of different length to be mixed yet remain orthogonal. The present invention provides a system whereby a subset of codes are employed whereby the bit rate can be reduced. This is of particular advantage under poor propagation conditions. Mutual interference between users is reduced.

대표
청구항
▼

The disclosure relates to wireless communications such as cdma systems where variable orthogonal spreading factors are employed. Code words are selected from a representation known as the orthogonal variable spreading factor (OVSF) tree, which allows code words of different length to be mixed yet remain orthogonal. The present invention provides a system whereby a subset of codes are employed whereby the bit rate can be reduced. This is of particular advantage under poor propagation conditions. Mutual interference between users is reduced. located in the...

이 특허에 인용된 특허 (5)

  1. Ovesjo Fredrik,SEX ; Dahlman Erik,SEX, Channelization code allocation for radio communication systems.
  2. Magnusson Sverker,SEX ; Khan Farooq,SEX ; Persson Magnus,SEX ; Beming Per,SEX, Code allocation in CDMA.
  3. Cudak Mark C. ; Ghosh Amitava, Data transmission within a spread-spectrum communication system.
  4. John M. Harris ; Rajesh Pazhyannur, Data transmission within a spread-spectrum communication system.
  5. Stewart Kenneth A. ; Ghosh Amitava, Method and apparatus for mobile station location within a communication system.

이 특허를 인용한 특허 (45)

  1. Ma, Jianglei; Jia, Ming; Tong, Wen; Zhu, Peiying; Zhang, Hang; Xu, Hua; Yu, Dong-Sheng, Adaptive two-dimensional channel interpolation.
  2. Ma, Jianglei; Jia, Ming; Xu, Hua; Tong, Wen; Zhu, Peiying; Yu, Dong-Sheng; Zhang, Hang, Adaptive two-dimensional channel interpolation.
  3. Ma, Jianglei; Jia, Ming; Xu, Hua; Tong, Wen; Zhu, Peiying; Yu, Dong-Sheng; Zhang, Hang, Adaptive two-dimensional channel interpolation.
  4. Cheong, Kok-Wui, Efficient tapped delay line equalizer methods and apparatus.
  5. Cheong, Kok-Wui, Efficient tapped delay line equalizer methods and apparatus.
  6. Nanda, Sanjiv; Tiedemann, Edward G.; Yavuz, Mehmet, Interface management in a wireless communication system using subframe time reuse.
  7. Yavuz, Mehmet; Black, Peter J.; Nanda, Sanjiv, Interface management in wireless communication system using hybrid time reuse.
  8. Yavuz, Mehmet; Black, Peter; Nanda, Sanjiv, Interface management in wireless communication system using hybrid time reuse.
  9. Nagarajan, Vijay; Scharf, Louis L.; Narayan, Anand P., Interference cancellation in variable codelength systems for multi-access communication.
  10. Nagarajan, Vijay; Scharf, Louis L.; Narayan, Anand P., Interference cancellation in variable codelength systems for multi-access communication.
  11. Nagarajan, Vijay; Scharf, Louis L; Narayan, Anand P, Interference cancellation in variable codelength systems for multi-access communication.
  12. Nagarajan, Vijay; Scharf, Louis L.; Narayan, Armand P., Interference cancellation in variable codelength systems for multi-acess communication.
  13. Yavuz, Mehmet; Black, Peter J.; Nanda, Sanjiv, Interference management employing fractional frequency reuse.
  14. Yavuz, Mehmet; Black, Peter J.; Nanda, Sanjiv, Interference management employing fractional time reuse.
  15. Yavuz, Mehmet; Black, Peter J.; Nanda, Sanjiv; Tokgoz, Yeliz, Interference management in a wireless communication system using adaptive path loss adjustment.
  16. Nanda, Sanjiv; Walton, Jay Rodney; Yavuz, Mehmet, Interference management in a wireless communication system using beam and null steering.
  17. Black, Peter J.; Fan, Mingxi; Vanichpun, Sarut; Yavuz, Mehmet, Interference management in a wireless communication system using frequency selective transmission.
  18. Black, Peter J.; Fan, Mingxi; Vanichpun, Sarut; Yavuz, Mehmet, Interference management in a wireless communication system using frequency selective transmission.
  19. Yavuz, Mehmet; Nanda, Sanjiv; Black, Peter J.; Mohanty, Bibhu, Interference management utilizing HARQ interlaces.
  20. Yavuz, Mehmet; Black, Peter J.; Nanda, Sanjiv, Interference management utilizing power and attenuation profiles.
  21. Yavuz, Mehmet; Black, Peter; Nanda, Sanjiv, Interference management utilizing power and attenuation profiles.
  22. Yavuz, Mehmet; Black, Peter J.; Nanda, Sanjiv, Interference management utilizing power control.
  23. Tokgoz, Yeliz; Yavuz, Mehmet; Meshkati, Farhad, Method and apparatus for adjusting rise-over-thermal threshold.
  24. Jia, Ming; Ma, Jianglei; Zhu, Peiying; Yu, Dong-Sheng; Tong, Wen, Method and apparatus for channel quality measurements.
  25. Jia, Ming; Ma, Jianglei; Zhu, Peiying; Yu, Dong-Sheng; Tong, Wen, Method and apparatus for channel quality measurements.
  26. Jia, Ming; Ma, Jianglei; Zhu, Peiying; Yu, Dong-Sheng; Tong, Wen, Method and apparatus for channel quality measurements.
  27. Narayan, Anand P.; Olson, Eric S.; Jain, Prashant; Thomas, John K., Method and apparatus for interference suppression with efficient matrix inversion in a DS-CDMA system.
  28. Narayan, Anand P.; Olson, Eric S.; Jain, Prashant, Method and apparatus for selectively applying interference cancellation in spread spectrum systems.
  29. Narayan, Anand P.; Olson, Eric S.; Jain, Prashant, Method and apparatus for selectively applying interference cancellation in spread spectrum systems.
  30. Kim,Duk Kyung; Jung,Yoon Seok; Lee,Sang Yun; Kim,Jin Young, Method for assigning codes in uplink of synchronous wireless telecommunication system.
  31. Yang,Guu Chang; Yang,Chia Ming; Lin,Pei Hsuan, Method for generating 2D OVSF codes in multicarrier DS-CDMA systems.
  32. Noh, Jeong-Min; Kim, Ho-Joong, Method of efficiently processing dormant state in packet service and multi-mode terminal for the same.
  33. Lamba, Gagandeep Singh; Guess, Tommy; McCloud, Michael; Narayan, Anand P, Methods for estimation and interference cancellation for signal processing.
  34. Lamba, Gagandeep Singh; Guess, Tommy; McCloud, Michael; Narayan, Anand P.; Jain, Prashant, Methods for estimation and interference cancellation for signal processing.
  35. Lamba, Gagandeep Singh; Guess, Tommy; McCloud, Michael; Narayan, Anand P., Methods for estimation and interference suppression for signal processing.
  36. Lamba, Gagandeep Singh; Guess, Tommy; McCloud, Michael; Narayan, Anand P., Methods for estimation and interference suppression for signal processing.
  37. Magnusson,Per Olof Magnus, Orthogonal variable spreading code (OVSF) allocation telecommunications network.
  38. Zuniga,Juan Carlos; Iacono,Ana Lucia; Stern Berkowitz,Janet, Orthogonal variable spreading factor (OVSF) code assignment.
  39. Zuniga,Juan Carlos; Iacono,Ana Lucia; Stern Berkowitz,Janet, Orthogonal variable spreading factor (OVSF) code assignment.
  40. Moshavi,Shimon; Yellin,Daniel; Pick,Kobby, Reduced complexity MMSE multiuser detection for a multirate CDMA link.
  41. Bastug, Ahmet; Demaj, Pierre, Symbol-level adaptation method for equalizer coefficients, memory, equalizer and receiver for implementing the method.
  42. Bastug, Ahmet; Demaj, Pierre, Symbol-level adaptation method, memory, equalizer and receiver for implementing this method.
  43. Narayan, Anand P.; Olson, Eric S., Systems and methods for serial cancellation.
  44. Sugaya,Shigeru; Iwasaki,Jun, Wireless communication system using an impulse signal train, a wireless transmission apparatus, a wireless reception apparatus, a wireless transmission method, and a wireless reception method.
  45. Sugaya,Shigeru; Iwasaki,Jun, Wireless communication system using an impulse signal train, a wireless transmission apparatus, a wireless reception apparatus, a wireless transmission method, and a wireless reception method.

IPC 상위 출원인