Comparable to LoRa? What is ChirpIoT technology?

ChirpIoT™ is a new modulation and demodulation technology released by Panqi Microelectronics in 2020. In 2022, Panqi Micro announced ChirpLAN, a networking protocol for the Internet of Things. ChirpIoT™ technology is based on Panqi's many years of in-depth research on linear spread spectrum signals such as radar. On this basis, it improves the changes of linear spread spectrum signals and realizes a wireless communication technology for long-distance transmission.

The biggest feature of ChirpIoT™ technology is that under the same power and communication rate conditions, it can transmit farther than other traditional wireless methods such as FSK, OOK, MSK, etc., making the communication distance 3-5 times longer than that of traditional wireless RF communication.

Basic Principle

Spread Spectrum Technology: Spread spectrum technology is a technology that improves the anti-interference ability and reliability of communication systems by expanding signal bandwidth. Common spread spectrum technologies include direct sequence spread spectrum (DSSS) and linear frequency modulation spread spectrum (CSS).

Chirp Spread Spectrum (CSS): CSS is a technology that achieves spread spectrum by changing the linear change of signal frequency over time. Specifically, the frequency of the CSS signal increases or decreases linearly within a certain range, forming a "chirp" signal. Chirp signals have good anti-interference and multipath resistance, and are very suitable for long-distance communication in complex environments.

Technical Features

Long-distance communication: ChirpIoT™ technology uses the spread spectrum characteristics of CSS to achieve long-distance communication. By extending the signal bandwidth, ChirpIoT™ is able to perform reliable data transmission under low signal-to-noise ratio (SNR) conditions, suitable for wide-area IoT applications.

Low power consumption: ChirpIoT™ technology is designed for low-power communication, suitable for battery-powered IoT devices. The low power consumption characteristics enable ChirpIoT™ devices to operate for a long time without frequent battery replacement.

High reliability: CSS signals have good anti-interference and multipath effect resistance, allowing ChirpIoT™ technology to maintain high reliability even in complex environments. ChirpIoT™ technology also supports error correction coding, which further improves the reliability of data transmission.

Flexibility and scalability: ChirpIoT™ technology supports multiple frequency bands and data rates, which can be adjusted according to specific application requirements. Its flexibility and scalability make ChirpIoT™ suitable for various IoT application scenarios.

ChirpLAN and LoRaWAN

ChirpLAN is an open source P2P or star-shaped wireless local area network protocol based on ChirpIoT™ technology. LoRaWAN is a network protocol based on LoRa technology. They both belong to low-power wide area network (LPWAN) technology. ChirpLAN is similar to LoRaWAN, with the characteristics of secure communication, convenient networking, low power consumption and long-distance communication, and is mainly used in Internet of Things applications.

ChirpLAN follows the Apache 2.0 protocol, and the protocol code and specifications are completely open source. The network construction method is flexible and diverse, and it can support both networking and point-to-point. ChirpLAN's lightweight configuration (code <15KB, SRAM <4KB) and a variety of power consumption configurations can adapt to various scenarios with different power consumption and real-time requirements. LoRaWAN has a mature ecosystem and support. The ChirpLAN ecosystem may not be as mature as LoRaWAN, but it has domestic independent intellectual property rights and can be widely used in various domestic application scenarios.

Working mechanism

Signal generation: ChirpIoT™ technology achieves spread spectrum by generating a linear frequency modulation (chirp) signal. The frequency of the chirp signal increases or decreases linearly within a certain range, forming a periodic frequency change.

Data modulation: Data modulation is to map the data to be transmitted to the frequency change of the chirp signal. ChirpIoT™ technology usually uses modulation methods such as frequency shift keying (FSK) or phase shift keying (PSK) to embed data into the chirp signal.

Signal transmission: The modulated chirp signal is transmitted through a wireless channel. Since the chirp signal has a spread spectrum characteristic, its bandwidth is much wider than the original data bandwidth, thereby improving the anti-interference ability and reliability.

Signal reception and demodulation: After the receiving end receives the chirp signal, the chirp signal is restored to the original data through the demodulation process. The demodulation process includes frequency demodulation and data decoding, and usually uses technologies such as correlation detection and matched filtering to improve the demodulation accuracy and reliability.

FAQ

Q1: What is the core difference between ChirpIoT and traditional FSK technology?

A: The primary difference lies in the modulation. ChirpIoT uses Chirp Spread Spectrum (CSS), which allows it to transmit data over distances 3 to 5 times longer than FSK or OOK under the same power conditions by improving signal-to-noise ratio (SNR) performance.

Q2: Is ChirpLAN an open-source protocol?

A: Yes. ChirpLAN follows the Apache 2.0 protocol, meaning its code and specifications are completely open-source. This allows developers to flexibly build both point-to-point (P2P) and star-shaped network architectures.

Q3: Can ChirpIoT devices run on batteries for a long time?

A: Yes. ChirpIoT technology is specifically designed for low-power consumption. Its ability to maintain reliable communication at low power levels makes it ideal for battery-powered IoT sensors and wide-area applications.

Q4: How does ChirpIoT compare to LoRaWAN in terms of hardware requirements?

A: ChirpIoT is highly optimized for lightweight hardware. A typical ChirpLAN configuration requires less than 15KB of Flash (Code) and less than 4KB of SRAM, making it much easier to implement on low-cost microcontrollers than many other LPWAN protocols.