Consider 10 arbitrary real-valued signals . Suppose each is upsampled by a factor of N,...

Consider 10 arbitrary real-valued signals . Suppose each is upsampled by a factor of N, and then sinusoidal amplitude modulation is applied to it with carrier frequency . Determine the value of N which would guarantee that all 10 modulated signals can be summed together to yield an FDM signal y[n] from which each can be recovered.