公开(公告)号：AT435532T

公开(公告)日：2009-07-15

申请号：AT03761021

申请日：2003-05-05

Applicant: MOTOROLA INC

Inventor： ANDERSON DALE ,  MITZLAFF JAMES

IPC: H04B7/00 ,  H03F1/02 ,  H03G3/00 ,  H03G3/30

Abstract: An optimal operating point of an envelope tracking amplification system that includes a radio frequency (RF) power amplifier having an RF amplifying element is determined based on an application to the RF power amplifier of a supply voltage that is less than the rated voltage of the RF amplifying element.

公开(公告)号：DE69032502D1

公开(公告)日：1998-08-27

申请号：DE69032502

申请日：1990-11-27

Applicant: MOTOROLA INC

Inventor： BERKEN JAMES ,  FREEBURG THOMAS ,  OGASAWARA ROY ,  WHITE RICHARD ,  MITZLAFF JAMES ,  BEDLEK GREGORY

IPC: H04B7/24 ,  H04J3/00 ,  H04J3/16 ,  H04L12/28 ,  H04L12/56 ,  H04J3/24 ,  H04B1/00 ,  H04Q7/20

Abstract: A wireless in-building telecommunications system for voice and data communications is disclosed having at least one node (101) arranged for linking to the PSTN (151) and at least one digital information source (153, 155, 157, 159) multiplicity of user modules (103) (UM's) linked to the node via a shared RF communications path (107). Each UM is coupled to a voice telephone instrument (127) and to one or more data terminals (165). The UM's communicate with the node by exchanging fast packets via the common RF path (107). The node also includes a fast-packet-switched mechanism controlled by a bandwidth allocating scheme to prevent collisions of packets as they are transmitted between the various units (101, 103) (nodes and/or user modules) that may be accessing the RF path (107). Also disclosed is a method for allocating the required bandwidth to each of the users of the common communications path in a wireless in-building telephone system. The invention provides for the combination of both voice and data in a single switch using a common packet structure. It allows for the dynamic allocation of bandwidth based on system loading. This includes not only bandwidth within the voice or data areas of the frame, but also between the voice and data portions. It also synchronizes the transfer of the data and the allocation of bus bandwidth.

公开(公告)号：DE69032502T2

公开(公告)日：1999-03-04

申请号：DE69032502

申请日：1990-11-27

Applicant: MOTOROLA INC

Inventor： BERKEN JAMES ,  FREEBURG THOMAS ,  OGASAWARA ROY ,  WHITE RICHARD ,  MITZLAFF JAMES ,  BEDLEK GREGORY

IPC: H04B7/24 ,  H04J3/00 ,  H04J3/16 ,  H04L12/28 ,  H04L12/56 ,  H04J3/24 ,  H04B1/00 ,  H04Q7/20

Abstract: A wireless in-building telecommunications system for voice and data communications is disclosed having at least one node (101) arranged for linking to the PSTN (151) and at least one digital information source (153, 155, 157, 159) multiplicity of user modules (103) (UM's) linked to the node via a shared RF communications path (107). Each UM is coupled to a voice telephone instrument (127) and to one or more data terminals (165). The UM's communicate with the node by exchanging fast packets via the common RF path (107). The node also includes a fast-packet-switched mechanism controlled by a bandwidth allocating scheme to prevent collisions of packets as they are transmitted between the various units (101, 103) (nodes and/or user modules) that may be accessing the RF path (107). Also disclosed is a method for allocating the required bandwidth to each of the users of the common communications path in a wireless in-building telephone system. The invention provides for the combination of both voice and data in a single switch using a common packet structure. It allows for the dynamic allocation of bandwidth based on system loading. This includes not only bandwidth within the voice or data areas of the frame, but also between the voice and data portions. It also synchronizes the transfer of the data and the allocation of bus bandwidth.