Magnitude of the shift-invariant transmit and receive spatial correlation coefficients compared with Jakes’ model. measured data, the expectation is replaced by an average over all time samples. The transmit and receive correlation coefficients are then constructed using ρT ,q = RT ,q /RT ,0 and ρR,p = RR,p /RR,0 , respectively. Figure 1.5 shows the shift-invariant spatial transmit and receive correlation coefficient computed from the 10 × 10 data versus antenna separation p z and q z. For comparis