Method and apparatus for transmission and reception within...

Details Method and apparatus for transmission and reception within... Method and apparatus for transmission and reception within...

2006-02-14

2006-02-14

Ngo, Ricky (Department: 2663)

Multiplex communications

Channel assignment techniques

Combining or distributing information via code word channels...

C370S208000, C370S342000

Reexamination Certificate

active

06999467

ABSTRACT:
A staggered spread OFCDM scheme is utilized that improves channel estimation. In a first embodiment, each chip stream is time shifted by a predetermined amount and then transmitted on a predetermined subcarrier. This results in time-spread symbols being staggered (time-offset) on different subcarriers allowing for more frequent sampling of the channel. In a second embodiment a staggered spreading approach is applied in the frequency dimension to improve the performance of a system with spreading in the frequency dimension.

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[1] Performance of multi-carrier CDMA systems with channel estimation in two dimensions Kaiser, S.; Hoeher, P. Personal, Indoor and Mobile Radio Communications, 1997. ‘Waves of the Year 2000’. PIMRC '97., The 8th IEEE International Symposium on, vol. 1, Iss., Sep. 1-4, 1997 pp.: 115-119 vol. 1.
[2] Broadband packet wireless access incorporating high-speed IP packet transmission Abeta, S.; Atarashi, H.; Sawahashi, M. Vehicular Technology Conference, 2002. Proceedings. VTC 2002-Fall. 2002 IEEE 56th, vol. 2, Iss., 2002 pp.: 844-848 vol. 2.
[3] Throughout comparison between VSF-OFCDM and OFDM considering effect of sectorization in forward link broadband packet wireless access Maeda, N.; Atarashi, H.; Abeta, S.; Sawahashi, M. Vehicular Technology Conference, 2002. Proceedings. VTC 2002-Fall. 2002 IEEE 56th, vol. 1, Iss., 2002 pp.: 47-51 vol. 1.

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