Wireless Communication System Modeling

RF system design in wireless communications involves integrating various RF components like antennas, filters, amplifiers, modulators, and demodulators. When designing an RF system, it is crucial to consider the tradeoffs in these components to mitigate noise and intermodulation distortion effects.

For LTE and 5G applications, it is important to characterize the impact of LTE interference on the RF reception of a new radio (NR) waveform. To characterize the impact of LTE interference, use RF Blockset™ to design an RF receiver and downconvert baseband LTE and NR waveforms. By downconverting the waveforms, you can calculate metrics such as error vector magnitude (EVM), adjacent channel leakage ratio (ACLR), occupied bandwidth, channel power, and complementary cumulative distribution functions (CCDF) using LTE Toolbox™ and 5G Toolbox™. To implement a measurement testbench for your RF receiver in LTE reception, you can use the rfsystem object as a device under test (DUT).

In WLAN applications, it is necessary to characterize the impact of RF impairments, including in-phase and quadrature (IQ) imbalance, phase noise, and power amplifier (PA) nonlinearities, on the transmission of an 802.11ax waveform. You can use WLAN Toolbox™ to generate and oversample a baseband 802.11ax waveform for this purpose. You can then import this waveform as an RF signal into the RF transmitter block for upconversion. Using the upconverted waveform, you can calculate metrics such as spectral mask, occupied bandwidth, channel power, CCDF, and peak-to-average power ratio (PAPR).

By leveraging these tools and methodologies, you can effectively characterize the impact of LTE interference in RF reception and RF impairments in transmission, enabling comprehensive analysis and optimization of RF system designs for wireless communications.