In Chapter 1 we developed an expression for the Doppler shift associ- ated with a CW radar (i.e., fd = 2v/2, where the plus sign is used for clos- ing targets and the negative sign is used for receding targets). CW radars can use the system shown in Fig. P3.7 to determine whether the target is closing or receding. Assuming that the emitted signal is A cos @ot and the received signal3.3. In a multiple frequency CW radar, the transmitted waveform consists of two continuous sinewaves of frequencies f = 105KHz and f = 115KHz. Compute the maximum unambiguous detection range.