"Advancing the future of wireless communications"
INTERFERENCE AVOIDANCE AND UNIVERSAL RADIOS
By Christopher Rose
Interference avoidance is a new concept based on the idea that universal radios -- radios which can vary their modulation waveform and demodulation characteristics on command -- will soon become a reality. Under this scenario, it makes sense for individual users to optimize their waveforms to achieve the best performance. What is a bit surprising is that such local greed behavior often results in a globally optimum ensemble of user waveforms where each user receives the minimum possible common average interference from other users. Furthermore, the basic ideas transcend any particular modulation scheme and may be applicable to a wide variety of scenarios. Of particular interest to us is its utility in unlicensed band systems such as the U-NII where many systems will have to peacefully coexist.
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