Use backoff to scale a signal prior to inputting it to a table-based power amplifier. It also shows how to examine the power distribution of the signal input to the amplifier, and to verify that the actual behavior of the amplifier matches the specification. The Appendix lists helper functions used in the example.

Designs an RF receiver for a ZigBee®-like application using a top-down methodology. It verifies the BER of an impairment-free design, then analyzes BER performance after the addition of impairment models. The example uses the RF Budget Analyzer App to rank the elements contributing to the noise and nonlinearity budget.

Use the RF Blockset™ Circuit Envelope library to simulate noise and calculate noise power. Results are compared against theoretical calculations and a Communications Toolbox™ reference model.

Use the RF Blockset Circuit Envelope library to model the thermal noise of a super-heterodyne RF receiver and measure its effects on the bit error rate (BER) of a communications system. The RF receiver model does not include impedance mismatches or nonlinearities. A Communications Toolbox reference model with parameters computed using Friis equations is used to verify the results.

Use the RF Blockset™ Circuit Envelope library to simulate the performance of a Low IF architecture with the following RF impairments: Component noise

The effects of adjacent and co-channel interference on a PSK modulated signal. The model includes two interferers, Interferer 1 and Interferer 2. The model enables you to modify the frequency offset and the power gain of each interferer, and view the effects on a spectrum plot.

How the antenna mutual coupling affects the performance of an orthogonal space-time block code (OSTBC) transmission over a multiple-input multiple-output (MIMO) channel. The transmitter and receiver have two dipole antenna elements each. The BER vs. SNR curves are plotted under different correlation and coupling scenarios. To run this example, you need Antenna Toolbox™.

Characterize a power amplifier (PA) using measured input and output signals of an NXP Airfast PA. Optionally, you can use a hardware test setup including an NI PXI chassis with a vector signal transceiver (VST) to measure the signals at run time.

This demo shows an example of using digital predistortion (DPD) in a transmitter to offset the effects of nonlinearities in a power amplifier. In this case, we use a model of a power amplifier that was obtained using the Power Amplifier Characterization. In the first simulation, the RF transmitter sends two tones. In the second simulation, the RF transmitter sends a 5G-like OFDM waveform with 100 MHz bandwidth.

Use Communications Toolbox™ blocks to model thermal noise, phase noise, and nonlinearity impairments of an RF transceiver. The model measures the effects of the impairments on the bit error rate (BER) of a communications system.

The effect of a high-power in-band or out-of-band interferer on the performance of a communications system with an analog-to-digital converter (ADC).