CAM-M8 - Data Sheet

UBX-15031574 - R04

Page 8 of 31

Production Information

1.5 Supported GNSS constellations

The CAM-M8 series GNSS modules are concurrent GNSS receivers which can receive and track

multiple GNSS systems: GPS, Galileo, GLONASS and BeiDou. Owing to the dual-frequency RF front-

end architecture, either GLONASS or BeiDou can be processed concurrently with GPS and Galileo

signals providing reception of three GNSS systems. By default the M8 receivers are configured for

concurrent GPS and GLONASS, including SBAS and QZSS reception. If power consumption is a key

factor, then the receiver should be configured for a single GNSS operation using GPS, Galileo,

GLONASS or BeiDou and disabling QZSS and SBAS. The module can be configured to receive any

single GNSS constellation or within the set of permissible combinations shown below.

GPS

Galileo

GLONASS

BeiDou

•

•

–

–

•

•

•

–

•

•

–

•

•

–

•

–

•

–

–

•

–

•

•

–

–

•

–

•

–

–

•

•

Table 2: Permissible GNSS combinations (• = enabled)

1.5.1 GPS

The u-blox CAM-M8 series positioning modules are designed to receive and track the L1C/A signals

provided at 1575.42 MHz by the Global Positioning System (GPS).

1.5.2 GLONASS

The CAM-M8 modules can receive and process GLONASS concurrently with GPS or BeiDou. The

Russian GLONASS satellite system is an alternative system to the US-based Global Positioning

System (GPS). u-blox CAM-M8 positioning modules are designed to receive and track the L1OF

signals GLONASS provided at 1602 MHz + k*562.5 kHz, where k is the satellite’s frequency channel

number (k = –7,..., 5, 6). The ability to receive and track GLONASS L1OF satellite signals allows design

of GLONASS receivers where required by regulations.

In order to take advantage of GPS and GLONASS, dedicated hardware preparation must be taken

during the design-in phase, see the CAM-M8 Hardware Integration Manual [1] for u-blox design

recommendations.

1.5.3 BeiDou

The CAM-M8 series positioning modules can receive and process the B1I signals broadcast at

1561.098 MHz from the BeiDou Navigation Satellite System. The ability to receive and track BeiDou

signals in conjunction with another constellation results in higher coverage, improved reliability and

better accuracy. Currently, BeiDou is not fully operational globally and provides Chinese regional

coverage only. Global coverage is scheduled for 2020.