Motorola Corporation

Lawrence M Mohl

Michael D Kotzin

Kenneth J Crisler

Anthony P Van Den Heuvel

Bradley Michael Hiben

Daehyoung Hong

Mark R Poulin

Theodore Saltzberg

An RF communications system that can determine when a requesting subscriber unit comprises a TDM capable unit, and when it doesn't. Channel assignments are based upon this determination. The system also includes repeaters that can translate communications in a TDM format as transmitted by a TDM capable unit into non-TDM format for subsequent transmission to a non-TDM capable unit, and vice versa.

TDM/FDM communication system supporting both TDM and FDM-only

According to the invention, an information signal, such as a information signal, is sampled, quantized and processed digitally through an information encoder. Digitally processed samples produced by the encoder are modulated onto a communication channel to create channel symbols having a magnitude of modulation proportional to a characteristic of a respective digitally processed sample. Both a radio frequency (RF) transmission embodiment, and a wireline embodiment are provided. In a final aspect of the present invention, encryption is provided to ensure communication privacy.

Spectrally efficient method for communicating an information signal

A communication system that provides TDM and FDM communications between communication units. At least two control slots are provided in each TDM frame window to provide communication control information such as channel assignment information.

Multiple control slot TDM/FDM communication system

Growing community of inventors

Hoffman Estates, IL, United States of America

Lawrence M Mohl