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Understanding and Testing Multichannel RF Systems with Signal Generators – Part 2

Understanding and Testing Multichannel RF Systems with Signal Generators – Part 2

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Engineers turn to multi-antenna techniques to achieve diversity, multiplexing, or antenna gains. Through these gains, the wireless systems can increase the receiver’s robustness, data throughput, and signal-to-noise ratio (SNR). Multi-antenna RF systems use a common local oscillator (LO) distributing to multiple channels. Testing multi-antenna systems requires a test system capable of providing multiple signals and a constant phase relationship between the signals. However, a commercial signal generator has an independent synthesizer to upconvert an intermediate frequency (IF) signal to an RF signal. Further, using commercial signal generators to simulate multichannel RF systems may result in some phase errors between the signal generators. Engineers must minimize such errors to accurately characterize the systems.

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