Title:
WIRELESS COMMUNICATION SYSTEM AND DATA TRANSMISSION DEVICE USED IN WIRELESS COMMUNICATION SYSTEM
Document Type and Number:
WIPO Patent Application WO/2015/159627
Kind Code:
A1
Abstract:
In the present invention, a data receiving device receives signals sent from a plurality of data transmission devices. The signals sent from each of the data transmission devices have a frame format comprising a plurality of data units that become the units for doing spread spectrum modulation using a spreading code. Data units that are mutually adjacent within a single frame format are modulated using mutually orthogonal spreading codes. The number of data units included in a single frame format is the same for the plurality of data transmission devices, and data units in corresponding positions undergo spread spectrum modulation using the same spreading code. Without providing a signal receiving function to a data transmission device in a spread spectrum communication system, it is possible to suppress an increase in the number of demodulation routines in a receiving device, and suppress an increase in the probability of signal collisions that cannot be demodulated.
Inventors:
INOUE MANABU (JP)
Application Number:
PCT/JP2015/057788
Publication Date:
October 22, 2015
Filing Date:
March 17, 2015
Export Citation:
Assignee:
MURATA MANUFACTURING CO (JP)
International Classes:
H04J13/18; H04W4/04; H04W28/06; H04W28/16; H04W72/04
Foreign References:
| JP2000513548A | 2000-10-10 | |||
| JP2003506979A | 2003-02-18 |
Other References:
BANG CHUL JUNG ET AL.: "Uplink Capacity Improvement Through Orthogonal Code Hopping in Uplink-Synchronized CDMA Systems", IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, vol. 8, no. 11, November 2009 (2009-11-01), pages 5404 - 5410, XP011284783
HSIAO-HWA CHEN ET AL.: "Code-Hopping Multiple Access Based on Orthogonal Complementary Codes", IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, vol. 61, no. 3, March 2012 (2012-03-01), pages 1074 - 1083, XP011433957
SUWON PARK ET AL.: "Orthogonal Code Hopping Multiplexing", IEEE COMMUNICATIONS LETTERS, vol. 6, no. 12, December 2002 (2002-12-01), pages 529 - 531, XP011423683
HSIAO-HWA CHEN ET AL.: "Code-Hopping Multiple Access Based on Orthogonal Complementary Codes", IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY, vol. 61, no. 3, March 2012 (2012-03-01), pages 1074 - 1083, XP011433957
SUWON PARK ET AL.: "Orthogonal Code Hopping Multiplexing", IEEE COMMUNICATIONS LETTERS, vol. 6, no. 12, December 2002 (2002-12-01), pages 529 - 531, XP011423683
Attorney, Agent or Firm:
KITAYAMA, Mikio et al. (JP)
Mikio Kiyama (JP)
Mikio Kiyama (JP)
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