Performance improvement for a hotspot embedded in CDMA systems

Jung Shyr Wu, Jen Kung Chung, Yu Chuan Yang

Research output: Contribution to journalConference articlepeer-review

7 Scopus citations


The CDMA system can provide more capacity than other systems and the hierarchical layer of cells is required for system design. However, the problem is whether the same RF channels used in CDMA overlayed/underlayed macrocell and microcell structure also obtain a high capacity as in the homogeneous structure. In this study, we investigate the interference of uplink and downlink from both the microcell and macrocell under a hierarchical structure. Downlink power control scheme and two power control methods for uplink are also considered. Performance measures such as blocking probability, C/I, capacity and service hole area are also obtained by computer simulation. With downlink power control, microcellular capacity can be increased. However, combining of downlink power control for microcell and C/I uplink power control for macrocell causes the overall system capacity to significantly increase.

Original languageEnglish
Pages (from-to)944-948
Number of pages5
JournalIEEE Vehicular Technology Conference
StatePublished - 1997
EventProceedings of the 1997 47th IEEE Vehicular Technology Conference. Part 1 (of 3) - Phoenix, AZ, USA
Duration: 4 May 19977 May 1997


Dive into the research topics of 'Performance improvement for a hotspot embedded in CDMA systems'. Together they form a unique fingerprint.

Cite this