Consider the GPS receiver system shown below. The guaranteed minimum L1 (1575 MHz) carrier power received by an antenna on Earth having a gain of 0 dBi is Si = -160 dBW. A GPS receiver is usually specified as requiring a minimum carrier-to-noise ratio, relative to a 1 Hz bandwidth, of C/N (Hz). If the receiver antenna actually has a gain G A and a noise temperature TA, derive an expression for the maximum allowable amplifier noise figure F, assuming an amplifier gain G and a connecting line loss L. Evaluate this expression for
