d is the distance between the transmitter and receiver, d0 is the reference distance; n is the channel attenuation index, the general value of 2 to 4; xσ is a Gaussian random variable of zero mean and variance σ; pl (d0) is from the transmitter machine d0 at the signal strength, you can experience o

D is a transmitter and receiver, the distance between D0 and n is the reference distance channel attenuation is a general index, the value of 2 to 4; X Sigma are value is zero, the variance should be a Gaussian random variable; PL (D0) is the distance from the transmitter D0 signal strength, can be

d is between the transmitter and the receiver distance, d0 is the reference distance; n is the channel damped exponent, general value 2~4; Xσ is the average value is the zero, the variance sigma Gauss random variable; PL(d0) is away from the transmitter d0 place signal strength, may obtain through t

D is transmitter and receiver Zhijian of distance, d0 is reference distance; n is channel attenuation index, General take value 2~4;X σ is are value for zero, and variance σ of Gaussian random variable; PL (D0) is distance transmitter d0 Department of signal strength, can through experience obtained

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