公开(公告)号：DE19949586B4

公开(公告)日：2005-09-15

申请号：DE19949586

申请日：1999-10-14

Applicant: ADVANTEST CORP

Inventor： KURIHARA TOSHIAKI ,  ARAI MICHIAKI

IPC: H04L27/18 ,  H04L27/00 ,  H04L27/22 ,  H04L27/233

Abstract: The offset QPSK modulation analytic system capable of estimating the initial phase of an offset QPSK modulated signal is disclosed. For each of a plurality of candidate values for the initial phase, the correlation coefficient between a signal whose clock delay has been estimated and compensated and an ideal signal generated based on the signal is computed, and the candidate value having the maximum value of the computed correlation coefficient is estimated as the optimum initial phase.

公开(公告)号：DE19949586A1

公开(公告)日：2000-04-20

申请号：DE19949586

申请日：1999-10-14

Applicant: ADVANTEST CORP

Inventor： KURIHARA TOSHIAKI ,  ARAI MICHIAKI

IPC: H04L27/18 ,  H04L27/00 ,  H04L27/22 ,  H04L27/233

Abstract: For each of several candidate values for an initial phase a coefficient of correlation is calculated between a signal whose clock pulse delay has been estimated and compensated and an ideal signal created by the signal. The system includes a ZF signal converter (100), a baseband converter (200), a frequency error coarse estimator-cum-compensator (300), an initial phase and frequency error estimator-cum-compensator (400) and a precise parameter estimator (500).

公开(公告)号：CA2354856A1

公开(公告)日：2002-02-11

申请号：CA2354856

申请日：2001-08-08

Applicant: ADVANTEST CORP

Inventor： KURIHARA TOSHIAKI ,  NISHINO EIJI ,  ICHIKAWA HIDEKI ,  KOIZUMI SATOSHI

IPC: G01R29/08 ,  H04J13/00 ,  H04J13/18 ,  H04B7/216 ,  H04B17/00 ,  H04J13/02

Abstract: It is an object to provide a device making it possible to simplify displays of data of the Code Domain Power and data pertinent thereto. A physical quantity display device 1 for displaying physical quantity o f multiple signals, which displays physical quantity in every predetermined channel while demodulating signals onto which channels with different spreading code length are multiplexed, which device is provided with a channel storage section 20 for storing display object channels to be displayed and spreading code length of the display object channels, a power calculation section 30 for calculating power of the display object channels, and a power display sectio n 40 for displaying the power of the display object channels, which is capable of displaying the power about the display object channel stored in the channel storage section 20, and which is capable of displaying the display object channels with different spreading code length simultaneously because coexistence of different spreading code length of the display object channels is allowed.

公开(公告)号：JP2000124961A

公开(公告)日：2000-04-28

申请号：JP30786798

申请日：1998-10-14

Applicant: ADVANTEST CORP

Inventor： KURIHARA TOSHIAKI ,  ARAI MICHIAKI

IPC: H04L27/18 ,  H04L27/00 ,  H04L27/22 ,  H04L27/233

Abstract: PROBLEM TO BE SOLVED: To provide an offset QPSK modulation analyzing system capable of estimating an initial phase and clock delay contained in a received signal using an offset QPSK modulating system. SOLUTION: Phase correcting parts 4301-430n perform phase corrections respectively corresponding to (n) pieces of candidate values ϕ1-ϕn of the initial phase, and clock delay correcting parts 4301-430n estimate the clock delay while using a QPSK signal returning the offset component of quadrature or in-phase component of this phase corrected signal original. A correlation coefficient calculating part 442 calculates the coefficient of mutual correlation between a real clock delay corrected signal and a correspondent ideal signal, and an optimum initial phase discriminating part 450 extracts the initial phase of the maximum mutual correlation coefficient as one closest to a true value.

公开(公告)号：JP2003014798A

公开(公告)日：2003-01-15

申请号：JP2001195400

申请日：2001-06-27

Applicant: Advantest Corp ,  株式会社アドバンテスト

Inventor： ICHIKAWA HIDEKI ,  NISHINO EIJI ,  KURIHARA TOSHIAKI ,  NAKADA JUICHI ,  KOIZUMI SATOSHI

IPC: G01R29/08 ,  H04B1/707 ,  H04J13/20

Abstract: PROBLEM TO BE SOLVED: To simultaneously display measurement data such as power in two or more kinds of code hierarchies. SOLUTION: Bar graphs 360J, K have a constant breadth ((1/128)W) regardless of diffusion code length, whereas display regions 360E, F have widths ((1/32)W, (1/4)W) corresponding to diffusion code lengths. Since intervals 360G, H where nothing is displayed are produced in the display regions 360E, F as a result, diffusion code length can be read from the breadth of the intervals. Accordingly, to which code hierarchy a code domain power, etc., belong can be told, even if measurement data such as code domain powers in two or more kinds of code hierarchies is simultaneously displayed.

Abstract translation: 要解决的问题：同时显示两种或多种代码层次中的功率等测量数据。 解决方案：条形图360J，K具有恒定的宽度（（1/128）W），不管扩散码长度如何，而显示区域360E，F的宽度（（1/32）W，（1/4）W）对应于 扩散码长度。 由于在显示区域360E，F中产生间隔360G，H，因此在显示区360E，F中产生不显示的间隔，可以从间隔的宽度读取扩散码长度。 因此，即使同时显示诸如代码域功率的测量数据，也可以同时显示代码域功率等所属的代码层级。

公开(公告)号：JP2004053253A

公开(公告)日：2004-02-19

申请号：JP2002206591

申请日：2002-07-16

Applicant: Advantest Corp ,  株式会社アドバンテスト

Inventor： KURIHARA TOSHIAKI ,  MUTO MASAHIKO

IPC: G01D7/00 ,  G01R29/08 ,  G09G5/00 ,  G09G5/36

Abstract: PROBLEM TO BE SOLVED: To easily display a result of comparison of the magnitude relation between a measurement signal and a threshold. SOLUTION: When the electric power displayed on an electric power graph 44 is over a threshold displayed on a threshold value graph 46, the kind of line of the part (threshold) 46a over the threshold is changed from a solid line to a dotted line. Here, as an image plane 40 is single, an independent image plane for displaying the magnitude relation between the power and the threshold becomes unnecessary. Whereby the display of the result of comparison of the magnitude relation between the power and the threshold can be easily performed. COPYRIGHT: (C)2004,JPO

公开(公告)号：JP2000307668A

公开(公告)日：2000-11-02

申请号：JP11251299

申请日：1999-04-20

Applicant: ADVANTEST CORP

Inventor： ARAI MICHIAKI ,  KURIHARA TOSHIAKI

IPC: G01R29/06 ,  G01R29/08 ,  H04B7/26 ,  H04J3/00 ,  H04L27/18 ,  H04W28/10 ,  H04W88/08 ,  H04Q7/38

Abstract: PROBLEM TO BE SOLVED: To measure the modulation precision of a TDMA communication system at a base station in an actual operation state and a mobile terminal in a packet communication state. SOLUTION: The device is equipped with a burst signal rise detection part 22 which detects a rise in a burst signal, a burst signal demodulation part 23 which demodulates the signal in the burst by slots from the rise, and a sink word detection part 24 which detects whether or not the signal in the demodulated burst contains a sink word to be measured. Even if one frame has multiple bursts, the sink word detection part 24 detects the word to be measured, so which burst the sink word to be measured is present can be detected, so the modulation precision in the actual operation state can be measured.

公开(公告)号：JP2002057651A

公开(公告)日：2002-02-22

申请号：JP2000243848

申请日：2000-08-11

Applicant: ADVANTEST CORP

Inventor： KURIHARA TOSHIAKI ,  KOIZUMI SATOSHI ,  NISHINO EIJI ,  ICHIKAWA HIDEKI

IPC: G01R29/08 ,  H04J13/00 ,  H04J13/18

Abstract: PROBLEM TO BE SOLVED: To provide an apparatus making easily understandable indications of the code domain power and data relating therewith. SOLUTION: The physical quantity indictor 1 for indicating physical quantities every specified channel after demodulating signals having multiplexed channels of different diffusion code lengths, comprises a channel recorder 20 for recording target channels to be indicated and the diffusion code lengths of the target channels, a power calculator 30 for calculating the power of the target channel, and a power indicator 40 for indicating the power of the target channel. It can indicate the power of the target channel recorded by the recorder 20 and also the target channels of different diffusion code lengths at the same time, since the diffusion code lengths of the target channels may be different.