Title :
Frequency diversity gain in indoor GSM systems
Author :
H?¶?¶k, Mikael ; Johansson, Christer ; Olofsson, H?¥kan
Author_Institution :
Ericsson Radio Syst. AB, Stockholm, Sweden
Abstract :
Wideband frequency hopping is one of the key properties of the GSM air interface. Frequency hopping introduces diversity on the transmission link, which improves the receiver performance. However, in indoor GSM systems, less frequency diversity gain is expected due to the characteristics of the indoor radio channel. The gain of frequency diversity in indoor 1800 MHz GSM systems is analyzed by means of bit level simulations of the GSM full rate speech channel together with a wideband channel model. The analysis shows that the gain of frequency diversity in indoor environments is still considerable, even though the delay spread of the radio channel is as low as 20-30 ns
Keywords :
UHF radio propagation; cellular radio; delays; digital simulation; diversity reception; frequency hop communication; indoor radio; land mobile radio; radio links; radio receivers; simulation; telecommunication channels; 1800 MHz; 20 to 30 ns; GSM air interface; GSM full rate speech channel; UHF; bit level simulations; delay spread; frequency diversity gain; indoor GSM systems; indoor radio channel; indoor radiowave propagation; receiver performance; transmission link; wideband channel model; wideband frequency hopping; AWGN; Bandwidth; Buildings; Fading; Frequency diversity; GSM; Indoor environments; Indoor radio communication; Speech analysis; Wideband;
Conference_Titel :
Vehicular Technology Conference, 1996. Mobile Technology for the Human Race., IEEE 46th
Print_ISBN :
0-7803-3157-5
DOI :
10.1109/VETEC.1996.503460
