1 The symbol period *T* is the amount of time over which a single data symbol is transmitted. Hence, the data rate in a digital transmission system is directly proportional to .

2 (·)* ^{T}* denotes the standard transpose operation.

3 For an ideal isotropic radiator, *G _{t}* =

4 A positive real number *x* representing a *ratio* of powers can be expressed in dB as *X* = 10 log_{10} *x* dB, and is unitless. If a number *y* is a power in units of Watts (W) or *z* in milliwatts (mW), it could also be expressed as *Y* = 10log_{10} *x* dBW or *Z* = 10log_{10} *x* dBm, respectively, where 1 W = 1000 mW so 0 dBW = 30 dBm. Note also that in this lexicon *x* · *y* gives ...

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