Introduction

As the “crown jewel” of high-end manufacturing, chips are a critical indicator of a nation’s overall strength and the cornerstone of the information industry. Core chips not only bring significant profits to national industries but also create a multiplying effect that propels rapid growth across sectors. Mastering key chip technologies, especially in high-end products, enables China to dominate the global industry chain, thus supporting the national strategy for the information industry’s development. Beidou RF chips play a pivotal role in ensuring China’s space-time information security and are crucial to the country’s technological innovation strategy. By developing autonomous and controllable Beidou RF chips, China can break free from long-standing technological barriers and monopolies imposed by foreign suppliers, resolving the challenges faced in Beidou applications and space-time information security. For emerging industries like IoT, connected cars, smart driving, and smart logistics, Beidou RF chips provide essential high-precision positioning and timing services that serve as the “sand and cement” for building these applications. These foundational technologies are indispensable for stable and secure development.

Beidou RF Chip Architecture: A Complex and Integrated Design

Beidou RF chips are typically composed of GNSS RF receivers, GNSS baseband signal processors, microprocessors, power management systems, memory, control units, storage units, and peripheral interface circuits. The complexity of chip design, particularly for integrated RF and baseband SoC (System on Chip) designs, makes the development of these chips highly challenging. Variations in design capabilities directly impact the chip’s performance, sensitivity, power consumption, size, and cost, thereby influencing the competitiveness of navigation and positioning terminal products. From the latest structural diagram of the fourth-generation Beidou RF chip by Huada Beidou, we can observe that high integration, performance enhancement, and multi-dimensional power control have become key focuses in Beidou RF chip development.

System on Chip (SoC): A Revolutionary Design

SoC (System on Chip) refers to a single chip that integrates all components of the hardware system and embedded software, and it is currently the main research direction for leading chip companies. Compared to SIP (System in Package) chips, which integrate multiple functional chips in a single package, SoC chips offer substantial advantages in terms of size, power consumption, and cost. The integration of RF, baseband, power management, embedded storage, and interfaces into a single SoC chip greatly enhances performance while minimizing power consumption, size, and cost. The latest fourth-generation Beidou RF chip by Huada Beidou continues to adopt the SoC architecture, integrating two microprocessors, RF units, digital baseband units, memory, power management, and peripheral interfaces, offering advantages like high integration, powerful functionality, low power consumption, and small size.

Key Technologies in Beidou RF Chip Development

Multi-System Multi-Frequency Combination Positioning

Beidou RF chips need to support multiple satellite navigation systems, such as Beidou (China), GPS (USA), GLONASS (Russia), GALILEO (Europe), QZSS (Japan), and NavIC (India), while receiving and combining satellite signals from multiple frequency bands (L1, L2, L5, L6). This allows the chip to maximize satellite signal resources and enhance positioning performance.

Beidou-Only Positioning and Beidou-Priority Positioning

Beidou RF chips must support new Beidou B1I, B1C, B2I, B3I, B2a, and B2b signals, ensuring reliable positioning and timing accuracy. The chips are designed to prioritize Beidou satellites for positioning, enabling Beidou to function as the primary system, with other satellite systems acting as secondary. This design enhances the reliability and security of Beidou-based navigation.

Anti-Jamming Capability

Beidou RF chips must be able to detect and filter out interference signals in real time to prevent jamming from affecting the chip’s navigation and positioning functions. This is critical for maintaining the chip’s integrity and performance in challenging environments.

Embedded High-Precision Positioning Algorithms

Beidou RF chips embed high-precision algorithms to ensure accurate positioning. Achieving this with limited processing power and storage capacity presents challenges, particularly when balancing low power consumption and cost. The latest fourth-generation Beidou RF chip supports satellite-inertial navigation combination algorithms, enhancing positioning reliability in various scenarios.

Online Ephemeris Collection and Offline Ephemeris Prediction

Ephemeris data is crucial for navigation, but in weak signal environments, the time required to acquire satellite navigation messages can be lengthy. The chip’s ability to store and quickly access ephemeris data, reducing cold start time and enabling faster positioning, is a key feature of Huada Beidou’s fourth-generation RF chip.

“Signal Source-Level” Security

To ensure the security and authenticity of Beidou navigation signals, hardware encryption within the chip will be essential. “Signal source-level” encryption will provide a secure foundation for location-based applications, ensuring that position data is not tampered with during transmission.

Key Technology: Multi-Dimensional Power Consumption Control

The power consumption of Beidou RF chips directly impacts the standby and operational time of terminals, especially for battery-powered mobile devices. To reduce power consumption, Beidou chips need to optimize all design points affecting power usage. For example, the latest fourth-generation Beidou RF chip reduces power consumption by approximately 50% compared to previous models, thanks to multi-dimensional power consumption control designs.

RF Power Optimization

By using a low-noise amplifier and phase-locked loop to receive dual-frequency signals, the RF chip’s power consumption is significantly reduced. Dynamic bandwidth and power configuration for different systems and frequency bands optimize signal reception quality and minimize power usage.

Ultra-Low Standby Power

Beidou RF chips use advanced transistor technology and low-power oscillator circuits to maintain ultra-low standby power consumption, enabling the chip to wake up from standby with minimal energy consumption. The standby power of the latest Beidou chip is less than 2μA, aligning with industry-leading low-power MCU chips.

Dynamic Frequency Adjustment

The processor’s working frequency and voltage adjust dynamically based on load, optimizing power consumption while maintaining high performance when necessary.

Optimized Power Management Strategies

Beidou RF chips utilize multiple power domains, enabling dynamic switching between different power modes, such as normal operation, sleep, deep sleep, and standby modes, to minimize energy consumption.

Conclusion: Advancing Beidou RF Chip Technology for Global Competitiveness

The development of Beidou RF chips represents a critical step for China’s satellite navigation industry. The innovations in SoC integration, high-performance design, and power consumption optimization are positioning China’s Beidou chips for global competitiveness. With breakthroughs in critical technologies, such as anti-jamming capabilities, embedded high-precision algorithms, and secure signal encryption, Beidou RF chips are becoming the backbone of numerous emerging industries, including IoT, smart cities, and autonomous driving. The continued development of these chips will ensure that China can secure its place as a leader in global satellite navigation and positioning technologies.