公开(公告)号：EP1612986A4

公开(公告)日：2006-02-22

申请号：EP04714495

申请日：2004-02-25

Applicant: DOSHISHA ,  ATR ADVANCED TELECOMM RES INST

Inventor： SASAOKA HIDEICHI ,  AONO TOMOYUKI ,  OHIRA TAKASHI

IPC: H04L9/08 ,  H04M1/725 ,  H04W12/00 ,  H04W12/02 ,  H04W16/24 ,  H04W16/28 ,  H04K1/00 ,  H04Q7/38

CPC classification number: H04W12/04 ,  H04L9/0838 ,  H04L9/0875 ,  H04L63/0435 ,  H04L2209/80 ,  H04M1/72522 ,  H04W16/24 ,  H04W16/28

Abstract: A radio communication system (100) comprising radio units (10, 30), an antenna (11), and an array antenna (20). The radio units (10, 30) transmit/receive specified signals through the antenna (11) and the array antenna (20) at the same frequency by a time division duplex (TDD) transmission/reception system, for example, while varying the directivity of the array antenna (20) among a plurality of directivities. The radio units (10, 30) detect the intensity of a plurality of received radio waves and create receiving signal profiles (RSSI1, RSSI2) indicative of a plurality of intensity profiles. The radio units (10, 30) represent the plurality of intensities of the receiving signal profiles (RSSI1, RSSI2) in multi-values and create private keys (Ks1, Ks2) having a bit pattern of the plurality of multi-values.

Abstract translation: 一种包括无线电单元（10,30），天线（11）和阵列天线（20）的无线电通信系统（100）。 例如，无线电单元（10,30）通过时分双工（TDD）发送/接收系统以相同的频率通过天线（11）和阵列天线（20）发送/接收指定信号，同时改变方向性 阵列天线（20）在多个方向之中。 无线电单元（10,30）检测多个接收到的无线电波的强度，并创建指示多个强度分布的接收信号轮廓（RSSI1，RSSI2）。 无线电单元（10,30）以多值表示接收信号轮廓（RSSI1，RSSI2）的多个强度并创建具有多个多值的比特模式的私有密钥（Ks1，Ks2）。

公开(公告)号：EP1974487A4

公开(公告)日：2013-07-24

申请号：EP07707273

申请日：2007-01-17

Applicant: DOSHISHA

Inventor： SASAOKA HIDEICHI ,  IWAI HISATO ,  MIYAMOTO YUSUKE

IPC: H04J13/00 ,  H04B1/707 ,  H04B1/709 ,  H04J11/00 ,  H04J13/16 ,  H04J13/18 ,  H04L5/00

CPC classification number: H04L5/0021 ,  H04B2201/709709 ,  H04J13/0048 ,  H04J2013/165

Abstract: A MC-CDMA transmitter and an MC-CDMA receiver are provided, which use a novel orthogonal spreading code that allows an effect by a delay wave to appear in only a specific user. An MC-CDMA system includes: a transmitter which multiplies a transmitting signal by a sinusoidal signal which has an amplitude of r and is orthogonal as a result that the frequency periods are different among users, in a frequency domain to be spread and split into orthogonal sub-carriers, and multiplexes the sub-carriers; and a receiver for receiving a transmitting signal from the transmitter in a manner that a sinusoidal signal, which has an amplitude of r and is orthogonal as a result that the frequency periods are different among users, is multiplied by the transmitting signal in a frequency domain, and the resultant is inversely spread.