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 (Communications Toolbox). 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.

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.

Illustrates a methodology for system-level modeling and simulation of a 66 GHz QPSK RF transmit and receive system with a 32-element hybrid beamforming antenna. The system includes RF imperfections, transmit array radiation effects, a narrowband receive array and a baseband receiver with corrections for system impairments and message decoding. The antenna beamforming direction is defined using azimuth and elevation angles and it is estimated in the RF receive antenna using a Root Music DOA algorithm.

Model a MIMO RF receiver with a baseband beamforming algorithm. It considers antenna coupling effects and RF imperfections. The simulation of the system-level model includes the RF receiver baseband beamforming algorithms, RF imperfections, and the antenna array radiation pattern.

Model a digital video broadcasting system which includes a 16 antenna phased array receiver operating at 28 GHz. The baseband transmitter, receiver and channel are realized with Communications Toolbox™. The RF receiver is implemented with the RF Blockset™ Circuit Envelope library, and the receive phased array antennas are constructed using Phased Array System Toolbox™. The 4 x 4 planar phased array feeds a 16 channel receive module that includes phase shifters to enable RF beamforming.

Demonstrates how to model and test an LTE RF receiver using LTE Toolbox™ and RF Blockset™.

In a radar system, the RF front end often plays an important role in defining the system performance. For example, since the RF front end is the first section in the receiver chain, the design of its low noise amplifier is critical to achieving the desired signal-to-noise ratio (SNR). This example shows how to incorporate RF front end behavior into an existing radar system design.

Set up a radar system simulation consisting of a transmitter, a channel with a target, and a receiver. For the Aerospace Defense industry, this is an important multi-discipline problem. RF Blockset is used for modeling the RF transmitter and receiver sections.

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.