Wirelessly functioning signal transmission system

US4716574A · kind A · utility

Assignee

• Siemens Aktiengesellschaft · DE

Inventors

• Paul Walter Baier · Kaiserslautern, DE
• Peter Rausch · Coburg, DE

Key dates

• Filing date: Feb 15, 1985
• Grant date: Dec 29, 1987
• Expiry date: Feb 15, 2005

Classification

• Technology area (CPC G): Physics
• CPC primary: G01S11/10
• WIPO field: Measurement
• WIPO sector: Instruments

Abstract

In a signal transmission system for broadband signals wherein the transmitting transducer and/or the receiving transducer has a non-isotropic radiation characteristic, properties of the received broadband signal, for example waveform shape, spectrum, duration and probability density function, depend on the alignment orientation of the transducers. A discriminator circuit is provided in the receiver for identifying or estimating parameters related to one or more of such properties as a measure of alignment orientation of the transducers. The invention can be utilized, for example, in noise-suppressing radio frequency message transmission systems wherein band spreading modulation (spread-spectrum-system) results in transmission of a much greater bandwidth than a conventional transmission of the message baseband frequencies.