Radio transceiver

Patent metadata

Field	Value
Publication number	US-10230482-B2
Application number	US-201715641275-A
Country	US
Kind code	B2
Filing date	Jul 4, 2017
Priority date	Oct 4, 2012
Publication date	Mar 12, 2019
Grant date	Mar 12, 2019

Abstract

A radio transceiver circuit for FDD communication is disclosed. It comprises a transmitter for FDD signal transmission in a first frequency band, a first receiver for FDD signal reception in a second frequency band, separate from the first frequency band, and a duplexer. An output port of the transmitter is operatively connected to a first port of the duplexer for transmitting, through the duplexer, signals in said first frequency band. An input port of the first receiver is operatively connected to a second port of the duplexer for receiving, through the duplexer, signals in said second frequency band. The radio transceiver circuit comprises a second receiver, separate from the first receiver, for reception in said first frequency band. An input port of the second receiver is operatively connected to said first port of the duplexer for receiving, through the duplexer, signals in said first frequency band. A related radio communication apparatus is also disclosed.

First claim

The invention claimed is:

1. A radio communication apparatus comprising:
a duplexer;
a transmitter configured to transmit, through the duplexer, signals in a first frequency band via a first port of the duplexer;
a first receiver configured to receive, through the duplexer, signals in a second frequency band, different from the first frequency band, via a second port of the duplexer; and a second receiver, different from the first receiver, configured to receive, through the duplexer, signals in said first frequency band via the first port of the duplexer; and
a first switch connected in a path between the first port of the duplexer and an output port of the transmitter for connecting the transmitter to the duplexer when the transmitter is to transmit said signals in said first frequency band and disconnecting the transmitter from the duplexer when the second receiver is to receive said signals in said first frequency band.

2. The radio communication apparatus of claim 1 , comprising a second switch connected in a path between the first port of the duplexer and an input port of the second receiver for connecting the second receiver to the duplexer when the second receiver is to receive said signals in said first frequency band and disconnecting the second receiver from the duplexer when the transmitter is to transmit said signals in said first frequency band.

3. The radio communication apparatus of claim 1 , being a user equipment for a cellular communication network.

4. The radio communication apparatus of claim 3 , wherein said second receiver is configured to communicate between said user equipment and another user equipment of said cellular communication network via a direct device-to-device communication link.

5. The radio communication apparatus of claim 3 , wherein said cellular communication network is a long-term evolution (LTE) cellular communication network.

6. The radio communication apparatus of claim 1 , having a time division duplex (TDD) mode, wherein the transmitter and the second receiver operate according to a TDD scheme.

7. The radio communication apparatus of claim 1 , wherein the first receiver and the second receiver are adapted to simultaneously receive signals in the second frequency band and the first frequency band, respectively.

8. A radio communication apparatus comprising:
a duplexer;
a transmitter configured to transmit, through the duplexer, signals in a first frequency band via a first port of the duplexer;
a first receiver configured to receive, through the duplexer, signals in a second frequency band, different from the first frequency band, via a second port of the duplexer;
and a second receiver, different from the first receiver, configured to receive, through the duplexer, signals in said first frequency band via the first port of the duplexer; and
a second switch connected in a path between the first port of the duplexer and an input port of the second receiver for connecting the second receiver to the duplexer when the second receiver is to receive said signals in said first frequency band and disconnecting the second receiver from the duplexer when the transmitter is to transmit said signals in said first frequency band.

9. The radio communication apparatus of claim 8 , being a user equipment for a cellular communication network.

10. The radio communication apparatus of claim 9 , wherein said second receiver is configured to communicate between said user equipment and another user equipment of said cellular communication network via a direct device-to-device communication link.

11. The radio communication apparatus of claim 9 , wherein said cellular communication network is a long-term evolution (LTE) cellular communication network.

12. The radio communication apparatus of claim 8 , having a time division duplex (TDD) mode, wherein the transmitter and the second receiver operate according to a TDD scheme.

13. The radio communication apparatus of claim 8 , wherein the first receiver and the second receiver are adapted to simultaneously receive signals in the second frequency band and the first frequency band, respectively.

Assignees

• Ericsson Telefon Ab L M

Inventors

• Sundstrom Lars
• Mattison Sven
• Wallen Anders

Classifications

• H04J4/00 Primary

  Combined time-division and frequency-division multiplex systems (H04J13/00 takes precedence {; data transmission H04L5/26; telemetry G08C15/00}) · CPC title

• H04B1/52

  Hybrid arrangements, i.e. arrangements for transition from single-path two-direction transmission to single-direction transmission on each of two paths or vice versa · CPC title

• H04B1/3805 Primary

  with built-in auxiliary receivers · CPC title

• H04L5/26

  combined with the use of different frequencies · CPC title

• H04W76/14

  Direct-mode setup · CPC title