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We propose a cost-effective cross-platform Wi-Fi 6 VSG/VSA, which is able to gain the flexibility and make a trade-off between the cost and performance. With the concept of software defined radio (SDR), we deconstruct the conventional VSG/VSA architectures into the core VSG/VSA software, cross-platform control interface, and radio platforms parts.
The core VSG/VSA software includes the Wi-Fi 6 signal generation and analysis functions.
The VSG software can generate baseband complex IQ waveform according to the IEEE 802.11ax specification.
And we design the receiver algorithm to demodulate the Wi-Fi 6 baseband complex IQ waveform.
To be able to test and measure the DUT, we also develop some desired test items in the VSA software, e.g., error vector magnitude (EVM), center frequency offset, sampling clock offset, spectrum flatness, spectrum emission mask etc.
In the cross-platform control interface part, we design a software interface which can transfer the RF setting parameters like transmit/receive center frequency, gain, bandwidth, sample rate etc.
Besides, the interface has to deliver complex IQ samples generated from VSG software to the radio platform, and also send back the received complex IQ samples to the VSA software for analysis.
The radio part is for arbitrarily matching different radio platforms according to different usage requirements. We currently integrate various series of NI high-end VST instruments and NI USRP SDRs.
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IEEE/ICACT20230156 Slide.05
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