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Global navigation satellite system receiver

A technology of satellite positioning system and satellite communication system, which is applied in the direction of satellite radio beacon positioning system, transmission system, equipment with GPS signal receiver, etc., and can solve the problem of not working at the same time

Inactive Publication Date: 2008-12-17
NOKIA TECH OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Thus, it is possible to combine a GPS receiver and a radiotelephone using a single integrated circuit, since either the GPS receiver or the radiotelephone is active and not both at the same time.

Method used

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  • Global navigation satellite system receiver
  • Global navigation satellite system receiver
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Examples

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example 1

[0043] Figure 7 is a more detailed flowchart of a method according to an embodiment of the present invention. In this embodiment, the VAD 404 is only required in the transmitting handset 350 . At step 701, it is determined that dual mode reception from the satellite 340 and from the transmitting handset 350 is required. At step 702, dual mode reception is started.

[0044] In step 703, the receiving handset 310 operates in the transmitting handset active mode. In the active mode of the transmitting mobile phone, the GNSS receiving part is active for 100ms within 1 second, for example. In this case, cellular system signal reception will be active most of the time, for example, 900ms in 1 second. This is shown in FIG. 8 . When the receiving handset 310 determines that the transmitter 350 is active, the handset can operate in cellular system mode. According to this exemplary embodiment, the handset can remain in this mode for 900ms at a time. During this time, no signals ...

example 2

[0049] Figure 10 Another embodiment for implementing the present invention is presented. In this embodiment, VAD 404 is required in both handsets 310 and 350 . In step 1001, it is determined that dual mode reception from the satellite 340 and from the transmitting handset 350 is required. In step 1002, dual mode reception is started.

[0050] In step 1003, the receiving handset 310 operates in the transmitting handset active mode. In the active mode of the transmitting mobile phone, the GNSS receiving part is active for 100ms in one second, for example. In this case, cellular reception will be active most of the time, eg 900ms in every second. For different receiving parts, other suitable active periods can also be used.

[0051] Next at step 1004, it is determined whether dual mode reception is required. If there is no need for dual-mode reception, then at step 1012, the dual-mode reception is terminated. However, if dual mode reception is desired, then at step 1005 t...

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Abstract

A method for a first wireless communication device to operate in wireless communication system mode and satellite positioning system mode. The first wireless communication device communicates with a second communication device. Voice activity of at least one of the communication devices is determined and based on the determined voice activity, the first wireless communication device switches between wireless communication system mode and satellite positioning system mode. The voice activity can be determined by using voice activity detector in at least one of the communication devices.

Description

technical field [0001] Embodiments of the invention relate to combined Global Navigation Satellite System (GNSS) receivers and cellular system receivers. More specifically, embodiments of the invention relate to receivers in which a radio frequency path between GNSS and cellular system signals can be shared. Embodiments of the invention also relate to corresponding methods, systems, modules and computer program products. Background technique [0002] In cellular systems, different multiple access techniques can be applied according to cellular system standards. In the Global System for Mobile Communications (GSM), combined Time Division Multiple Access and Frequency Division Multiple Access (TDMA / FDMA) techniques are used. The FDMA technique involves dividing the 25HMz bandwidth into 124 carrier frequencies separated by 200kHz. Each base station (BS) can be assigned several carrier frequencies. According to the TDMA technique, these carrier frequencies are divided in the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04Q7/38G01S5/14G01S1/00G01S19/36H04W88/06
CPCG01S19/36H04B1/3805H04M2250/10H04W88/06H04M1/724
Inventor S·皮厄蒂拉V·A·厄罗拉H·瓦利奥
Owner NOKIA TECH OY
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