Figure 4: of with m, dB, , and dB.(a) shows that the analytic expression for the square root of the CRB function is monotonically decreasing function with respect to the number of sensor motes. (b) shows that the analytic expression for the square root of the CRB function is monotonically increasing for the range and as approaches 0.5 the function approaches as the Fisher information converges to 0.