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EE263 homework problems Lecture 2 – Linear functions and ...

EE263 Autumn 2007-08 Prof. S. BoydEE263 homework problemsLecture 2 Linear functions and simple power control algorithm for a wireless some background. We considera network ofntransmitter/receiver pairs. Transmitteritransmits at power levelpi(whichis positive). The path gain from transmitterjto receiveriisGij(which are all nonnegative,andGiiare positive). The signal power at receiveriis given bysi=Giipi. The noise plusinterference power at receiveriis given byqi= +Xj6=iGijpjwhere >0 is the self-noise power of the receivers (assumed to be the same for all receivers).Thesignal to interference plus noise ratio(SINR) at receiveriis defined asSi=si/qi. Forsignal reception to occur, the SINR must exceed some threshold value (which is often inthe range 3 10).

Lecture 2 – Linear functions and examples 2.1 A simple power control algorithm for a wireless network. First some background. We consider a network of ntransmitter/receiver pairs. Transmitter itransmits at power level pi (which is positive). The path gain from transmitter jto receiver iis Gij (which are all nonnegative, and Gii are positive).

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