公开(公告)号：AU631426B2

公开(公告)日：1992-11-26

申请号：AU5536690

申请日：1990-04-04

Applicant: MOTOROLA, INC.

Inventor： DENNIS RAY SCHAEFFER

IPC: H01Q1/24 ,  H01Q3/24 ,  H01Q21/06 ,  H01Q21/20 ,  H04B7/00 ,  H04W88/08

Abstract: A signal routing system for use in cellular RF communications systems wherein a signal can be routed to different antennas, effectively switching transmitters between antennas. The switching is accomplished by placing a frequency responsive device (7) between a transmitter and each antenna. The transmitter is then coupled to an antenna through the frequency responsive device (7) that has a resonant frequency equal to the transmitter's frequency. If the transmitter changes frequency, it will be switched to the appropriate antenna through the corresponding frequency responsive device (7). This system permits a sector of a cell to increase the number of frequencies in that sector to handle increased mobile traffic loads.

公开(公告)号：FR2680064B1

公开(公告)日：1994-12-23

申请号：FR9209582

申请日：1992-07-31

Applicant: MOTOROLA INC

Inventor： DENNIS RAY SCHAEFFER ,  KOTZIN MICHAEL D

IPC: H04B7/26 ,  H04B7/005 ,  H04J4/00 ,  H04W36/16 ,  H04W52/50

Abstract: A communication system having a site employing a plurality of communication channels. Each channel is assigned a desired received signal strength threshold. A channel is assigned to a subscriber unit based upon the strength of the signal received at the site and the power control range of the subscriber unit. The selection of a channel may be performed either by the site or the subscriber unit. In an FDMA environment, each separate frequency division channel may be assigned different received signal strength thresholds. In a non-overlapping time interval (TDMA) environment, each separate time division channel may be assigned different received signal strength thresholds. In another embodiment, a combination of FDMA and TDMA environments can be used.