Abstract
A simple scheme is herein proposed to upgrade an older base-station's "dumb" antennas for use in an adaptive space-division frequency-reuse downlink, with no expensive retrofitting of each "dumb" antenna with its own rake receiver. This scheme adds only two horizontally oriented loops (plus an optional vertically oriented dipole) to a base station's 120°-azimuth sector, each with a temporal (not space-time) rake receiver. Such a pair (or triad) of diversely polarized but collocated antennas can estimate an incident mobile-source's uplink direction of arrival, based on which the existing "dumb" antennas can beam-form towards the mobile in downlink transmission.
| Original language | English |
|---|---|
| Pages (from-to) | 189-193 |
| Number of pages | 5 |
| Journal | IEEE Antennas and Propagation Magazine |
| Volume | 47 |
| Issue number | 1 |
| DOIs | |
| Publication status | Published - 1 Feb 2005 |
| Externally published | Yes |
Keywords
- Adaptive signal detection
- Array signal processing
- Direction of arrival estimation
- Diversity methods
- Land mobile radio diversity systems
- Land mobile radio equipment
- Multiuser channels
ASJC Scopus subject areas
- Electrical and Electronic Engineering