麗台SiRF V Module LR9151

features:
- sirf starv ultra low power chipset
- gps, glonass, galileo and sbas reception for high gnss availability and accuracy
- compact module size for easy integration : 15 x 14 x 2.8 mm
- fully utilized ss5 upgrade features

introduction
the lr9151 gps module is a high sensitivity, low power, surface mount device (smd) that fully utilized sirfstarv upgraded features. this 48-channel global positioning system (gps) and global navigation satellite system (glonass) receiver is designed for a wide range of oem applications and is based on the gps signal search capabilities of the sirfstarv csrg05e rom chipset, serf’ s newest chipset technology. the lr9151 provides flexible bus interfaces (uart).

the lr9151 is designed to allow quick and easy integration into gps-related applications such as:
- mobile gaming
- cellular handsets
- cameras
- asset tracking
- other location-aware consumer devices premium on-chip software provides a new level of continuous location awareness by employing.
- opportunistic ephemeris decode and advanced power management, which enable the gps receiver to stay in a hot-start condition nearly continuously while consuming very little power
- full support for client-based and server-based sirfinstantfixtm
- dynamic contextual awareness, temperature monitoring, and mems sensors that work in concert to conserve power and boost performance
- use of software control modules to achieve power saving state

performance
- highest performance solution :
- gps, glonass, galileo and sbas reception for high gnss availability and accuracy
- high sensitivity navigation engine (pvt) tracks as low as gps:-164dbm、glonass:-161dbm
- 48 track verification channels
- sbas (waas or egnos,msas)
- active jammer remover:
- removes in-band jammers up to 80 db-hz
- tracks up to 8 cw jammers
- multimode a-gps (autonomous, ms-based, and ms-assisted) – need operator support
- embedded cgee / sgee (with back-end server support) speed up ttff a lot and
makes cold start time to be around 20+ seconds.
- sirfgeorecovtm reverse ee makes positioning process being done under power
saving mode.
- reac time: 0.1 second
- rf metal shield for best performance in noisy environments

hardware and software
- based on the high performance features of the sirf star v low power single chipset.
- adaptive micropower controller:
- only 50 to 500μa maintains hot start capability
- <10mw required for tricklepower™ moderohs compliant (lead-free)
- smt pads allow for fully automatic assembly processes e and reflow soldering
- advanced navigation features:
- smart sensor i²c interface
- interrupt input for context change detection

advantages
- built-in lna.
- built-in internal rom and based on firmware 4.1.x
- it can remove in-band jammer up to 80db-hz and track up to 8cw jammers, so the
module can prevent gps signal interference when design-in the electrical device with
noisy electrical signal interferences such as laptop, mobile phone, dsc, etc.
- maintain tracking sensitivity as low as gps:-164dbm、glonass:-161dbm, even
without network assistance. (sirf stariii has only -159dbm sensitivity)
- support sirfaware technology :
- support adaptive “micro power controller” power management mode.
- <10mw trickle power, so user can leave power on all day instead of power off
- suitable for battery drive devices that need lower power consumption application
- ideal for high volume mass production(taping reel package)
- cost saving through elimination of rf and board to board digital connectors
- flexible and cost effective hardware design for different application needs
- embed cgee (client generated extended ephemeris) that can capture ephemeris data from satellites locally and predicts ephemeris out to 3 days. so if the module was off within 3 days, it could complete positioning process with limited time just like hot start.