Transceiver arrangement, communication device, method and computer program

US9871552B2 · kind B2 · utility

Assignee

• Telefonaktiebolaget LM Ericsson (Publ) · SE

Inventors

• Imad ud Din · Lund, SE
• Stefan Andersson · Flyinge, SE
• Daniel Eckerbert · Landskrona, SE
• Henrik Sjöland · Lund, SE
• Johan Wernehag · Malmö, SE

Key dates

• Filing date: Apr 30, 2013
• Grant date: Jan 16, 2018
• Expiry date: Jul 26, 2033

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L5/16
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A transceiver arrangement comprises a receiver arranged for frequency-division duplex communication with a communication network; a transmitter arranged for frequency-division duplex communication with the communication network; a transmission port for connecting to an antenna or wire; a first filter connected between an output of the transmitter and the transmission port and arranged to pass signals at transmitter frequency and attenuate signals at receiver frequency; a transformer having a primary winding and a secondary winding, wherein the primary winding has one of its terminals connected to the transmission port; a second filter connected between another of the terminals of the primary winding and a reference voltage and arranged to attenuate signals at transmitter frequency and pass signals at receiver frequency; and an adaptive impedance circuit arranged to provide an adjustable resistance, connected between the output of the transmitter and the junction between the second filter and the another of the terminals of the primary winding, and arranged to provide a contribution from the transmitter to the primary winding such that a common-mode rejection of a contribution from …