無線情報伝送装置及び無線情報伝送方法

Japanese Patent JP4351762

B2

According to the present invention a transmitter for the wireless transmission of information data for example according to the OFDM system is provided. The transmitter comprises means (9) for random orthogonal transforming (ROT) of blocks of data to be transmitted by a multiplication of a symbol vector (26) comprising the data of one block, with a matrix (29). Furthermore means for the transmission of data originating from the means (9) for random orthogonal transforming (ROT) are provided. According to the invention, the matrix operation uses a matrix (29) comprising n orthogonal columns, wherein n is the number of data samples comprised in one of said blocks, for example the number n used for the following IFFT procedure (10). The number of rows of said matrix (29) is larger than the number of said columns of said matrix (29). According to a further aspect of the present invention, a plurality of mutually orthogonal matrices are used in one base station. With other words, a plurality of orthogonal matrices are allocated to the same base station. The frequency band of OFDM can the be divided by these orthogonal matrices. Therefore, according to this aspect of the present invention, a multiple access technique in OFDM is provided

Seiichi Izumi

JP16891899A

October 28, 2009

June 15, 1999

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Sony International (Europe) Gesellschaft Mitt Beschlenktel Haftung

H03M13/25; H04J11/00; H04B15/00; H04L5/02; H04L27/26

A.Jalali, A.Gutierrez, Performance comparison of direct spread and multicarrier CDMAsystems ,Vehicular Technology Conference, 1998. VTC 98. 48th IEEE,米国,1998年 5月21日,vol.3,pp.2042-2046

Akira Koike
Eiichi Tamura
Seiji Iga

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