IP Catalog > Wireless IP Cores > GNSS IP > L5-direct GNSS receiver IP Core

L5-direct GNSS receiver IP Core

Overview

The challenges of today’s GNSS

Today’s mobile GNSS technology has significant reliability and accuracy limitations because it still depends on L1 signaling developed in the 1970s. L1 signals are susceptible to interference, struggle with multipath from building and tree blockage, have no error correction, and have low transmission power, which limits position availability and makes legacy L1-dependent receivers less reliable.

The L5 signal entered the consumer market twenty years ago to improve the accuracy, dependability, and resilience of location services. But consumers cannot fully tap into the advantages of L5 signal as the widely available L1/L5 hybrids are L1-first; they 100% depend on acquiring the 50-year-old L1 signals before switching to L5.

A better solution: oneNav’s breakthrough L5-direct™ technology

The L5-direct receiver directly acquires and tracks L5-band signals. Direct acquisition ensures all advantages of modern L5 without sacrificing space, power or extra cost.

Key Features

  • Proven in silicon at GF 22nm node
  • Directly acquires and tracks all modern L5-band signals (GPS, Galileo, BeiDou, QZSS)
  • Highly space- and power-optimized through novel array processor architecture for GNSS signal processing
  • Delivers economical high performance across all environments
  • The only commercial L5-direct technology on the market
  • Wideband (dual sideband) signal processing enables higher precision and better multipath resolution than existing single sideband or dual-frequency hybrid receivers
  • Uses a single RF chain to receive multi-constellation L5-band signals, enabling OEMs to reduce their RF footprint, power consumption, antenna subsystem complexity, and cost by eliminating dual band requirements
  • Flexible design can be integrated into modems, applications processors or other semiconductor devices or as an optimized standalone L5-direct GNSS ASIC
  • Digital IP core is portable across multiple silicon processes and has been synthesized at TSMC 12nm
  • Enables designers to implement whatever combination of performance and power consumption their design requires
  • Uses AI/Machine Learning to tackle multipath errors, utilizing all GNSS signals, including multipath signals, to get the very best accuracy by utilizing unique channel characteristics from the oneNav L5-direct receiver, oneNav’s Machine Learning models
  • Best urban canyon accuracy by utilizing unique channel characteristics available from the oneNav L5-direct receiver to resolve multipath using all GNSS signal in oneNav’s proprietary AI/Machine Learning algorithms

Benefits

  • A silicon-proven, easy-to-integrate digital IP core including flexible interfaces and a full test bench that is portable across multiple foundries and geometries
  • A full RF reference design for an L5-direct RF/Analog Mixed Signal front end or as a silicon proven hard macro at GF 22FDX
  • A reference Position Engine as integrable software library including oneNav  proprietary AI/ML algorithms for multipath reduction
  • All processing-intensive GNSS operations are included in hardware, rather than  software, reducing host CPU requirements
  • The IP core can be scaled in size and speed according to use case, ported to any process node, and is easily programmable via a simple API for rapid time-to-market and productization
  • Performance
    • Hot start time to first fix < 1sec
    • Open sky accuracy < 1.5m
    • Continuous tracking power in open sky is ~2 mW

Technical Specifications

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L5-direct GNSS receiver IP Core
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