Downlink propagation measurements in the GSM 900 and 1800 MHz bands

• The authors investigate radio propagation in the GSM 900 and 1800 MHz bands in a typical Swedish suburban environment to determine whether or not it is practically feasible to co-site GSM 900 with GSM 1800 systems. They show that propagation in the GSM 1800 band is considerable higher (about 12 dB) than in the old GSM 900. In many cases this difference can be reduced by using dual band sector antennas with 3 dB higher gain at 1800 MHz. However, they also show that in small cells (radius <1000 m) this difference is of little concern and therefore it is possible to co-locate GSM 1800 sites within existing 900 MHz sites as a cost-effective way to increase the system capacity.

Nyckelord

UHF radio propagation

cellular radio

multifrequency antennas

radio links

1800 MHz

900 MHz

GSM 1800 system

GSM 900 system

Sweden

UHF

cell radius

downlink propagation measurements

dual band antennas

dual band sector antennas

gain

small cells

suburban environment

system capacity

Antenna feeds

Antenna measurements

Area measurement

Base stations

Downlink

GSM

Performance evaluation

Receiving antennas

Telephony

Transmitting antennas

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