1. Introduction
In the rapidly evolving field of wireless communications, swift technological progress and intense market competition continuously push the boundaries of the industry. With the vigorous development of emerging technologies such as 5G, the Internet of Things (IoT), and Vehicle-to-Everything (V2X), wireless communication systems face unprecedented challenges in complexity and diversity. To ensure these systems can operate stably and efficiently in various real-world environments, wireless communication testing has become an indispensable part of the product development process. In this technological revolution, the broadcast channel simulator, as a core device for wireless communication testing, is leading a new era with its outstanding performance and flexible applicability.
2. The Necessity of Broadcast Channel Simulation
The wireless communication environment is an extremely complex and variable system, encompassing various factors such as channel conditions, noise interference, multipath effects, and Doppler shifts. These factors not only affect signal transmission quality and stability but also directly determine the overall performance of wireless communication systems. Traditional testing methods, such as hardware-based simulation or simple signal generators, can no longer meet the demands of modern wireless communication systems for high-precision, highly complex test scenarios.
The broadcast channel simulator was born to address this issue. It can simulate various channel conditions such as Rayleigh fading, Rician fading, path loss, and shadowing, as well as key parameters like multipath effects, Doppler shifts, and spread. This capability constructs a highly realistic wireless communication environment. Such simulation is crucial for the development, testing, and optimization of wireless communication systems.
Beijing Doewe Technologies Co., Ltd., targeting the complexity of the above channel environments, has launched the broadcast channel simulator ChnSml-BD. It focuses on solving issues such as inaccurate channel simulation, incomplete test scenario coverage, and difficulties in reproducing highly complex environments encountered during the R&D, testing, and optimization of wireless communication systems. ChnSml-BD enables R&D personnel to recreate various real-world channel conditions in a laboratory environment through highly flexible parameter configuration and powerful simulation capabilities. This allows for effective evaluation and optimization of wireless communication system performance. This not only significantly shortens product development cycles but also enhances system stability and reliability in practical applications.
3. Broadcast Channel Simulation Solution ChnSml-BD
（1）Product Overview
The ChnSml-BD broadcast channel simulator is meticulously crafted for equipment and system testing needs. It is dedicated to providing a realistic and convenient broadcast channel simulation environment for medium-wave (MW), short-wave (SW), and ultra-short-wave (USW) broadcast systems. This cross-band broadcast channel simulator integrates standard channel models with self-developed localized models for the China region, making it a high-end test instrument suitable for both indoor and outdoor field testing.
This simulator not only supports RF loopback testing to ensure result accuracy but is also widely applicable in fields such as public communications and broadcasting, enabling precise simulation of real channel characteristics. Its adaptive application mode for typical scenarios provides users with a uniquely convenient operational experience.
Furthermore, with the continuous development of wireless communication technologies, new application scenarios and communication standards are constantly emerging, placing higher demands on wireless communication testing. The ChnSml-BD broadcast channel simulator, leveraging its flexibility and scalability, can easily meet these new challenges. It supports multiple input signals, static/dynamic scenarios, and channel conditions, allowing flexible configuration according to different testing needs. This flexibility not only improves testing efficiency but also reduces testing costs, providing strong support for the rapid iteration and optimization of wireless communication systems.
（2）Product Features
- Band Adaptability: ChnSml-BD is equipped with diverse up/down-conversion modules, enabling flexible adaptation to the channel simulation requirements of different frequency band signals, ensuring broad applicability and accuracy of test results.
- Flexible Channel Model Input: The simulator supports full parameter configuration mode, allowing users to import channel models via third-party tools like MATLAB. It also provides a user development mode to meet diverse channel model input needs, enhancing testing flexibility and convenience.
- Rich Channel Model Library: ChnSml-BD integrates international and domestic standard models (e.g., ITU, GJB, GB) and self-developed localized channel models for the China region, providing users with channel simulation choices to ensure the accuracy and authenticity of test results.
- Diverse Application Scenario Configuration: The simulator supports configurations for various application scenarios such as adaptive, assisted, and expert-customized modes, meeting the testing needs of different users at different stages, and enhancing the relevance and practicality of testing.
- Real-Time Trajectory File Simulation: ChnSml-BD features real-time trajectory file simulation capability, enabling the simulation of channel characteristics in complex dynamic environments, providing test data support closer to real-world scenarios.
- Flexible Remote Control: Users can choose local or remote control of the ChnSml-BD broadcast channel simulator based on actual needs, enhancing testing convenience and flexibility to meet requirements in different scenarios.
（3）Product Parameters
- Number of Channels: 1 channel (expandable);
- Frequency Range: 300kHz~300MHz (expandable);
- Signal Bandwidth:
3kHz (300kHz~1.5MHz)；
50kHz (1.5MHz~30MHz)；
1MHz (30MHz~300MHz)。
- Channel Models: ITU models, GJB models, GB models, China regional localized channel models, user-defined, etc.;
- Fading Models: Rayleigh, Rice, Nakagami, Lognormal, Flat, Gaussian, etc.;
- Input Power: -30dBm to 0dBm (customizable);
- Output Power: -50dBm to -10dBm (customizable);
- Delay Range: 1ms~100ms;
- Doppler Shift: ±100kHz;
- Fading Range: 60dB;
- Interference Simulation: Gaussian white noise, CW (Continuous Wave) (expandable);
- Remote Control: Ethernet;
- Power Requirements: AC220V, 50Hz;
- Mechanical Structure: Standard rack-mountable structure, integrated display and control structure.
4. Doewe Solution
Doewe Technologies specializes in the development of channel simulation emulators and is committed long-term to providing realistic and precise channel environment simulation solutions for the medium-wave and short-wave test and measurement field. Advanced channel simulation emulators can highly reproduce complex communication scenarios, including various channel conditions, noise interference, multipath effects, and Doppler shifts, laying a solid foundation for the R&D, testing, and optimization of wireless communication systems. Beyond excellence in medium/short-wave test and measurement, Doewe Technologies also extensively serves the broadcasting & TV test and measurement, automotive electronics test and measurement, audio/video test and measurement, and general test & measurement and data acquisition fields. We provide these industries with professional test equipment, solutions, and customized services. Whether it's monitoring the transmission quality of broadcasting and TV signals, EMC testing for automotive electronic devices, or performance evaluation of audio/video equipment, Doewe Technologies offers comprehensive technical support and assurance. We sincerely invite customers from all sectors to inquire and collaborate with us to jointly drive the continuous innovation and development of test and measurement technologies.