-
公开(公告)号：EP2726835A4
公开(公告)日：2015-09-09
申请号：EP12804288
申请日：2012-06-05
Applicant: IBM
Inventor： SCHOTT WOLFGANG HANS , LOMBRISER CLEMENS , WEISS BEAT
CPC classification number: G01N29/04 , G01H1/00 , G01M5/0066 , G01M7/022 , G01M7/025 , G01V1/008 , G05B23/0235
-
公开(公告)号：DE602004006537T2
公开(公告)日：2008-01-31
申请号：DE602004006537
申请日：2004-11-19
Applicant: IBM
Inventor： FURRER SIMEON , JELITTO JENS , SCHOTT WOLFGANG , WEISS BEAT
Abstract: The invention relates to a method for modulating sub-carrier symbols to an intermediate-frequency OFDM signal having even and odd samples, including following steps: transforming a number N of the sub-carrier symbols to pre-processed sub-carrier symbols; performing a complex inverse discrete Fourier transformation (IDFT) on the pre-processed sub-carrier symbols to generate complex output symbols; and transforming the complex output symbols to the intermediate-frequency OFDM signal, wherein the sub-carrier symbols are transformed so that the even and odd samples of the intermediate-frequency OFDM signal are given by real and imaginary parts of the complex output symbols.
-
公开(公告)号：DE69426839T2
公开(公告)日：2001-07-26
申请号：DE69426839
申请日：1994-09-03
Applicant: IBM
Inventor： GFELLER FRITZ , RICHARD HEINZ , WEISS BEAT
IPC: H04B10/10
-
公开(公告)号：BR9408606A
公开(公告)日：1999-06-29
申请号：BR9408606
申请日：1994-09-03
Applicant: IBM
Inventor： GFELLER FRITZ , RICHARD HEINZ , WEISS BEAT
Abstract: The optical transmission module has an array of infra-red LEDs (51) arranged in a regular, and preferably symmetrical manner in the cavity formed by a dome-shaped housing (52). The housing has a diffuser for apparent source enlargement. The LEDs are either individually or commonly addressable. Pref., the LEDs of the array (11) are located on a mounting base (10) such that the main radiation axis of the diodes is approx parallel to the centre axis of the housing. Infra-red light is emitted from the array through the housing (52). There is a substrate for circuitry underneath the diodes. A transceiver for wireless data communication and for use in connection with the module is also claimed, which incorporates a receiver consisting of photodiodes.
-
公开(公告)号：PL175130B1
公开(公告)日：1998-11-30
申请号：PL32001894
申请日：1994-09-03
Applicant: IBM
Inventor： GFELLER FRITZ , RICHARD HEINZ , WEISS BEAT
Abstract: 1. An optical module for data transmission containing a matrix of infrared electroluminescent diodes positioned in a regular and symmetric way and a dome-shaped housing creating a recess characterised by a fact that a matrix of electroluminescent diodes (11, 31, 41, 51, 71, 81, 91, 101, 111, 121, 201, 221) is located in a recess and a dome-shaped housing (52,72, 102, 112, 122) contains an element (53, 73, 103, 113, 123) dispersing infrared radiation emitted by electroluminescent diodes (51, 71, 101, 111, 121).
-
Patent Agency Ranking
公开(公告)号：DE69425447T2
公开(公告)日：2009-09-10
申请号：DE69425447
申请日：1994-09-03
Applicant: IBM
Inventor： GFELLER FRITZ , RICHARD HEINZ , WEISS BEAT
IPC: H01L33/00 , G02B5/02 , G08C19/36 , H04B10/114 , H04B10/40
Abstract: The optical transmission module has an array of infra-red LEDs (51) arranged in a regular, and preferably symmetrical manner in the cavity formed by a dome-shaped housing (52). The housing has a diffuser for apparent source enlargement. The LEDs are either individually or commonly addressable. Pref., the LEDs of the array (11) are located on a mounting base (10) such that the main radiation axis of the diodes is approx parallel to the centre axis of the housing. Infra-red light is emitted from the array through the housing (52). There is a substrate for circuitry underneath the diodes. A transceiver for wireless data communication and for use in connection with the module is also claimed, which incorporates a receiver consisting of photodiodes.
-
公开(公告)号：CZ292638B6
公开(公告)日：2003-11-12
申请号：CZ28497
申请日：1994-09-03
Applicant: IBM
Inventor： GFELLER FRITZ , RICHARD HEINZ , WEISS BEAT
Abstract: The optical transmission module has an array of infra-red LEDs (51) arranged in a regular, and preferably symmetrical manner in the cavity formed by a dome-shaped housing (52). The housing has a diffuser for apparent source enlargement. The LEDs are either individually or commonly addressable. Pref., the LEDs of the array (11) are located on a mounting base (10) such that the main radiation axis of the diodes is approx parallel to the centre axis of the housing. Infra-red light is emitted from the array through the housing (52). There is a substrate for circuitry underneath the diodes. A transceiver for wireless data communication and for use in connection with the module is also claimed, which incorporates a receiver consisting of photodiodes.
-
公开(公告)号：SG32472A1
公开(公告)日：1996-08-13
申请号：SG1995001212
申请日：1995-08-25
Applicant: IBM
Inventor： GFELLER FRITZ , RICHARD HEINZ , WEISS BEAT
Abstract: The optical transmission module has an array of infra-red LEDs (51) arranged in a regular, and preferably symmetrical manner in the cavity formed by a dome-shaped housing (52). The housing has a diffuser for apparent source enlargement. The LEDs are either individually or commonly addressable. Pref., the LEDs of the array (11) are located on a mounting base (10) such that the main radiation axis of the diodes is approx parallel to the centre axis of the housing. Infra-red light is emitted from the array through the housing (52). There is a substrate for circuitry underneath the diodes. A transceiver for wireless data communication and for use in connection with the module is also claimed, which incorporates a receiver consisting of photodiodes.
-
公开(公告)号：CA2197916A1
公开(公告)日：1996-03-14
申请号：CA2197916
申请日：1994-09-03
Applicant: IBM
Inventor： GFELLER FRITZ , RICHARD HEINZ , WEISS BEAT
Abstract: Disclosed are optical transmitter and transceiver modules for data communication. Such a transceiver module comprises an array of light emitting diodes mounted on a mounting base (140) being arranged in a regular and symmetrical manner in a dome-shaped housing (142). This housing (142) comprises diffusor means for source enlargement. In addition to the transmitter part consisting of said diodes, the transceiver module comprises a receiver. The receiver has four photodiodes (143) arranged below the mounting base (140). These photodiodes are tilted and face in different directions to receive light from all around the module. The photodiodes are protected by a thin wire mesh (145) which serves as Faraday cage to reduce electro magnetic interference. A substrate (144) for electronic circuitry in SMD-Technology is situated underneath the photodiodes (143).
-
公开(公告)号：DE602004006537D1
公开(公告)日：2007-06-28
申请号：DE602004006537
申请日：2004-11-19
Applicant: IBM
Inventor： FURRER SIMEON , JELITTO JENS , SCHOTT WOLFGANG , WEISS BEAT
Abstract: The invention relates to a method for modulating sub-carrier symbols to an intermediate-frequency OFDM signal having even and odd samples, including following steps: transforming a number N of the sub-carrier symbols to pre-processed sub-carrier symbols; performing a complex inverse discrete Fourier transformation (IDFT) on the pre-processed sub-carrier symbols to generate complex output symbols; and transforming the complex output symbols to the intermediate-frequency OFDM signal, wherein the sub-carrier symbols are transformed so that the even and odd samples of the intermediate-frequency OFDM signal are given by real and imaginary parts of the complex output symbols.
-
-
-
-
-
-
-
-
-
Search Results
16
records
(took 0.018 seconds)
