Title :
An investigation of space-path hybrid diversity scheme for base station reception in CDMA mobile radio
Author :
Iwai, Hisato ; Shiokawa, Takayasu ; Karasawa, Yoshio
Author_Institution :
KDD R&D Labs., Saitama, Japan
fDate :
6/1/1994 12:00:00 AM
Abstract :
In CDMA mobile radio communication systems, degradation of instantaneous signal to interference power ratio (C/I), which causes impairment of frequency utilization factor, will be significant in multipath fading environments. In this paper, a hybrid diversity scheme for fading reduction combining effects of space diversity and path diversity (represented by the RAKE method) is investigated. A quantitative evaluation of fading reduction effects of the hybrid diversity is performed, comparing them with those of space diversity only and path diversity only. The hybrid diversity scheme is promising in environments where the delay spread of a transmission path is 1 μs or less
Keywords :
code division multiple access; diversity reception; fading; interference suppression; mobile radio systems; radio stations; radiofrequency interference; radiowave propagation; CDMA mobile radio; RAKE method; base station reception; delay spread; fading reduction; frequency utilization factor; multipath fading environments; path diversity; signal to interference power ratio; space diversity; space-path hybrid diversity; transmission path; Degradation; Delay; Diversity reception; Fading; Frequency; Land mobile radio; Multiaccess communication; Performance evaluation; RF signals; Radiofrequency interference;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
