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Registered Methods of frequency domain spreading code allocation for MC-CDMA based communication systems
이미지 확대
Methods of frequency domain spreading code allocation for MC-CDMA based communication systems
- Inventors
- Hyoungsoo Lim, Dongseung Kwon, Lee Yu Ro
- Application No.
- 12096874 (2006.07.25)
- Publication No.
- 20080291820 (2008.11.27)
- Registration No.
- 8305875 (2012.11.06)
- Country
- UNITED STATES
- Project Code
- 05MM1100, Research on 4G Mobile Communications Technology, Hwang Seung Ku
- Abstract
- The present invention relates to a method for allocating a frequency domain spread code in a base station of a multi-carrier code division multiple access (MC-CDMA) communication system. A code allocation priority is established based on interference between previously allocated spread codes and a newly allocated spread code so as to minimize the interference caused by channel fading or a synchronization error according to a transmitting or receiving timing offset when a scheduler of the base station in the MC-CDMA communication system allocates a subcarrier group to the plurality of user terminals or channels, and the spread code is allocated to the plurality of user terminals or channels according to the established priority, by the scheduler of the base station.
- KSP Keywords
- CDMA communication, Channel fading, Code division Multiple Access(CDMA), Communication system, Multi-Carrier, Multi-carrier code division multiple access(MC-CDMA), Synchronization error, User terminals, base station(BS), frequency domain(FD), multiple access, spreading code, spreading code allocation, timing offset