Fw: GPS tracking

From: Mat (Mat_Rob@manutd.com)
Date: Wed Feb 11 2004 - 03:44:30 EST

  • Next message: Russell Eberst: "FEB11.OBS"

     Hi Stan,
     You could possibly try a re-radiating antenna which will reradiate the
    signal  but this would need to be sighted on a window or possibly outside.
    The other option is a new GPS design which was featured in the January
    globalpositioningsystems news letter.
     Sony Electronics has announced the industry's first single-chip CMOS Global
    Positioning System (GPS) LSI that incorporates a built-in RF circuit in an
    ultra-miniature design. Designed independently by Sony, the CXD2951
    incorporates Sony's advanced RFCMOS block signal processing architecture to
    enable high sensitivity, minimal power consumption and high-performance.
    The new LSI configuration is ideal for a wide range of location-based
    applications such as automotive, cellular handsets, handheld navigation,
    fleet management and mobile computing devices.
    "We are very excited to bring a technology that was once mainly used in car
    navigation systems to a variety of portable electronics devices that we use
    in our daily lives," said Aki Hasegawa, president of Sony Electronics'
    Component Solutions Business Division. "The new Sony GPS LSI achieves
    improved sensitivity and faster processing while consuming less power,
    making it ideal for mobile computing products."
    Capable of stand-alone and network assisted signal detection of up to -150
    dBm, the new LSI achieves high sensitivity that enables even indoor
    reception of GPS satellite signals. Combining hot start positioning time of
    two to six seconds and power as low as 50 mW during tracking, the device
    achieves optimal power management and high performance.
    In addition, the new GPS LSI incorporates an external bus, GPIO, UART, and
    built-in RTC circuits, thus integrating all necessary GPS functions in a
    single CMOS chip for easy and cost-effective implementation into a GPS
    The CXD2951 features a simple serial interface connection and supports a
    wide range of TCXO frequencies, including those used in GSM, W-CDMA and AMPS
    cellular applications. The LSI comes in three different packages, GA, GL and
    GH to meet customers' size and mounting requirements.
    Using the CXD2951, Sony has developed a miniature GPS module with a
    footprint of 14 x 23 x1.8 mm, passive-antenna integrated GPS module, as well
    as an automotive-grade module conforming to QS9000/TS16949. All are designed
    to meet a wide range of applications and user requirements. With this
    advanced module technology, Sony continues to strive for significant cost
    savings, size reduction, and higher performance.
    Hope this is of some help.
    try taking a look around www.globalpositioningsystems.co.uk or maybe asking
    in their forums for more ideas.
    > ----- Original Message -----
    > From: "Stan Wijnans" <stan@stanw.demon.co.uk>
    > To: <SeeSat-L@satobs.org>
    > Sent: Tuesday, February 10, 2004 7:23 PM
    > Subject: GPS tracking
    > > This might be the wrong list, but I thought I try as I think somebody
    > > might know !
    > >
    > > I am interested in developing a GPS tracking system to trigger people
    > > for an art project. I'm trying to find out if this is possible inside a
    > > building as I am aware that GPS tracking has already been developed for
    > > outside but seems to be weak inside  ...
    > >
    > > Does anybody know how to make the GPS sensitive enough to go through
    > > walls, do I need a differential GPS or has anybody suggestions ? I have
    > > seen people on mobile phones in the tube in Asia, so something should
    > > be possible .... but how :-)) ??
    > >
    > > Any help is much appreciated
    > > Thanks, Stan
    > >
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