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白皮书
Overview
As the number of higher throughput applications grows, there is a need for wider bandwidth and network coverage in wireless systems. However, given limited spectrum allocation, you must look for ways to improve spectral efficiency and signal-to-noise ratio (SNR). Multi-antenna techniques, such as multi-input multioutput (MIMO), and beamforming can help you achieve diversity, multiplexing, and antenna gain in order to improve spectral efficiency and SNR. This white paper will help you understand phase coherence and why it matters and offer tactics for generating phase-coherent signals.
What Is Phase Coherence?
Two signals are coherent if they have a constant relative phase at all times. Figure 1a illustrates two non-coherent signals with phase varies and 1b shows coherent signals with fixed phase offset. When present together, coherent signals will combine constructively or destructively depending on their relative phase.
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