Title :
Channel modeling for 2-GHz-band urban line-of-sight street microcells
Author :
Taga, Tokio ; Furuno, Tatsuo ; Suwa, Keisuke
Author_Institution :
NTT Wireless Syst. Labs., Kanagawa, Japan
fDate :
1/1/1999 12:00:00 AM
Abstract :
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 π/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
Keywords :
UHF radio propagation; differential phase shift keying; error statistics; microcellular radio; multipath channels; quadrature phase shift keying; π/4-shift DQPSK transmission; 2 GHz; BER performance; VRP locations; attenuation parameter; bit error rate; building walls; channel model; delay profile; intersection points; location-specific model; low-antenna-height base sites; microcellular systems; nonfading conditions; propagation paths; signal transmission performance; street structure; urban line-of-sight street microcells; virtual reflection points; Bit error rate; Delay effects; Diversity reception; Laboratories; Microcell networks; Predictive models; Propagation delay; Reflection; Signal design; System performance;
Journal_Title :
Vehicular Technology, IEEE Transactions on
