EP0706665A4 -
    121.
    发明公开
    EP0706665A4 - 失效
    EP0706665A4 - Google专利

    公开(公告)号:EP0706665A4

    公开(公告)日:1996-05-08

    申请号:EP94922474

    申请日:1994-06-30

    摘要: Apparatus for measuring surveying parameters, such as distances and angular displacements between survey stations (11, 31), with improved accuracy. The invention combines a differential satellite positioning system (SATPS), available with positioning systems such as GPS and GLONASS, with electromagnetic measurements of distances and optically encoded angles by a conventional electro-optical survey instrument to provide survey measurements that can be accurate to within a few millimeters in favorable situations. The differential satellite positioning system relies upon carrier phse measurements, after removal of certain phase integer ambiguities associated with carrier phase SATPS signals. The SATPS may be retrofitted within the housing of the conventional electro-optical instrument.

    摘要翻译: 用于测量测量参数(例如测量站(11,31)之间的距离和角位移)的设备,具有改进的准确度。 本发明将可用于诸如GPS和GLONASS等定位系统的差分卫星定位系统(SATPS)与由常规电光调查仪器进行的距离和光学编码角度的电磁测量相结合,以提供可精确到 在有利的情况下几毫米。 在去除与载波相位SATPS信号相关联的某些相位整周模糊度之后,差分卫星定位系统依赖于载波频谱测量。 SATPS可以改装在常规电光学仪器的外壳内。

    SPREAD SPECTRUM CDMA COMMUNICATIONS SYSTEM
    122.
    发明公开
    SPREAD SPECTRUM CDMA COMMUNICATIONS SYSTEM 无效
    传播频谱CDMA通信系统

    公开(公告)号:EP0514539A4

    公开(公告)日:1995-05-24

    申请号:EP92903307

    申请日:1991-12-03

    申请人: SCS MOBILECOM INC

    摘要: A spread spectrum CDMA communications system for communicating data and/or digitized voice between a plurality or users to a plurality of PCN units. The spread spectrum communications system is located within a same geographical region as occupied by an existing FDMA, proposed TDMA or any other mobile cellular system. The spread spectrum CDMA communications system includes a plurality of PCN-base stations and a plurality of PCN units. A PCN-base station has a comb filter (333) for notch filtering predetermined channels of the mobile cellular system, a device for converting the format of the data into a form suitable for communicating over radio waves, a spread spectrum modulator for spread spectrum processing the data, and a transmitter for transmitting the spread spectrum processed converted data from the PCN-base station to a PCN unit. The PCN-base station also has an antenna, and spread spectrum detectors (334) for recovering data communicated from the PCN units. A PCN unit has an antenna (330), and a detector coupled to the antenna for recovering data communicated from PCN-base station. The detector includes a spread spectrum demodulator (334). Also, the PCN unit has a device for converting the format of the data into a form suitable for communicating over radio waves, a spread spectrum modulator and a transmitter.