BridgeWave used MathWorks tools for Model-Based Design to model and fully simulate the entire wireless link.
A team of engineers first used Simulink® to create a basic model of the system comprising a modulator, demodulator, and a bit-error rate (BER) counter. Because this was their first project using Simulink, they used a wireless model from the MATLAB Central file exchange to accelerate their early simulation efforts.
Using Communications System Toolbox™, BridgeWave selected the modulator and demodulator that most closely matched the product specifications. Using Simulink to simulate this baseline model, they produced a BER curve that met the requirements.
Engineers then replaced the modulator with a more realistic simulation created with Simulink blocks of lower-level hardware components. This more detailed design also included filters and other components from DSP System Toolbox™.
The team then followed the same approach with the demodulator, replacing high-level blocks with BridgeWave’s proprietary implementation using Simulink blocks.
Throughout development, engineers used the Simulink modulation and demodulation blocks as a standard for debugging. “Whenever we saw a problem with our modulator implementation, we switched back to the Simulink block and compared results,” says Bar-Sade. “It was a very efficient way to debug our system.”
Engineers used RF Blockset™ to incorporate RF components, including low-noise RF amplifiers, into the design. With RF Blockset, they used measured S-parameter data from existing amplifiers to simulate the devices in Simulink.
Once the team had developed a full system model, they ran simulations in Simulink, using different frequencies, filter bandwidth parameters, gain slopes, and signal-noise levels to fully evaluate the design. “We wanted to be sure—based on manufacturability and cost—that what we built would perform well. It was a big confidence builder to vary parameters and see the stability of our design,” explains Dr. John Park, principal systems engineer at BridgeWave.
“BridgeWave delivered its new FE60 wireless link, the first product based on the new platform, ahead of schedule, producing the longest-range 60GHz wireless Ethernet link on the market,” reports Bar-Sade. “Based on our success on this project, we are confident that MathWorks tools will be key contributors to our future development projects.”