Description
- Introduction and Key Features
- Designing RF Subsystems
- Simulating Wireless Systems Using Circuit Envelope Technology
- Simulating Wireless Systems Using Equivalent Baseband Technology
Simulating Wireless Systems Using Circuit Envelope Technology
SimRF integrates with Communications System Toolbox and DSP System Toolbox to simulate the effects of RF impairments and architectures on system performance. You can use SimRF to perform what-if analyses with different RF front-end architectures, or commit to a particular architecture and use simulation to develop algorithms to mitigate the RF impairments. For example, with SimRF and Communications Blockset, you could simulate the coexistence of various waveforms in the 2.4 GHz ISM band.
The set of RF impairments enabled by SimRF includes:
- Noise
- Even-order and odd-order intermodulation distortion due to in-band or out-of-band signals
- Spurious signals
- Image effects due to mixing products
- Phase offsets
- I and Q mismatch
- Isolation among blocks
- DC conversion
- DC offset
- Local oscillator phase noise
The probing capabilities of SimRF enable you to track the effects of these impairments through the model.
System-level model of an ISM-band receiver in SimRF (middle), low-IF Hartley receiver subsystem model (top), a spectrum display of the input signals to the receiver (bottom left), and a display of the received signal at the receiver output (bottom right). Ideal phase shifters for image cancellation with input signals are generated by SimRF. Impairments analyzed in this model include interference, odd-order intermodulation distortion, image effects, local oscillator phase noise, and quantization noise.
