NEO-M8 - Data Sheet

UBX-13003366 - R10

Production Information

Functional description

Page 7 of 26

1.4

Block diagram

Figure 1: NEO-M8 block diagram

1.5

GNSS

The NEO-M8 GNSS modules are concurrent GNSS receivers and can receive and track multiple GNSS systems

(e.g. GPS, GLONASS, Galileo-ready, BeiDou and QZSS signals). Because of the dual-frequency RF front-end

architecture, two of the three signals (GPS L1C/A, GLONASS L1OF and BeiDou B1) can be received and

processed concurrently. By default the M8 receivers are configured for concurrent GPS (includes SBAS and QZSS)

and GLONASS reception. If power consumption is a key factor, then the receiver should be configured for single

GNSS operation using either GPS or GLONASS or BeiDou and disabling QZSS and SBAS.

Galileo, QZSS and SBAS share the same frequency band as GPS and can always be processed in

conjunction with GPS.

1.5.1 GPS

The NEO-M8 positioning modules are designed to receive and track the L1C/A signals provided at 1575.42 MHz

by the Global Positioning System (GPS). The NEO-M8 series can receive and process GPS concurrently with

GLONASS or BeiDou.

1.5.2 GLONASS

The NEO-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

NEO-M8 positioning modules are designed to receive and track the L1OF signals GLONASS provides at 1602

MHz + k*562.5 kHz, where k is the satellite’s frequency channel number (k =

and track GLONASS L1OF satellite signals allows design of GLONASS receivers where required by regulations.

To take advantage of GPS and GLONASS, dedicated hardware preparation must be made during the design-in

phase. See the NEO-M8 Hardware Integration Manual [1] for u-blox design recommendations.

1.5.3 BeiDou

The NEO-M8 modules can receive and process BeiDou concurrently with GPS or GLONASS. u-blox NEO-M8

positioning modules are designed to receive and track the B1 signals provided at 1561.098 MHz by the BeiDou

Navigation Satellite System. The ability to receive and track BeiDou B1 satellite signals in conjunction with GPS

results in higher coverage, improved reliability and better accuracy. By the end of 2013 BeiDou is not fully

operational and provides regional coverage only. Global coverage is scheduled for 2020.