Channel modeling for 2-GHz-band urban line-of-sight street microcells

A channel model is presented for line-of-sight (LOS) street microcells with low-antenna-height base sites. This channel model assumes some virtual reflection points (VRPs) located at the intersection points along the LOS street and at building walls under the LOS condition. The VRP locations can be specified for the street structure, so this channel model behaves as a location-specific model. Using this VRP model, the delay profile can be predicted under nonfading and nonshadowing conditions for all propagation paths, and in laboratory experiments the bit error rate (BER) performance of /spl pi//4-shift DQPSK transmission can be evaluated. A comparison with 2-GHz-band field experiments shows that the best result for BER evaluation is obtained when the VRP attenuation parameter is 0.08. This channel model is a very useful means of predicting the signal transmission performance of LOS street microcellular systems.