Radio transceiver

Patent metadata

Field	Value
Publication number	US-9729263-B2
Application number	US-201314432597-A
Country	US
Kind code	B2
Filing date	Oct 2, 2013
Priority date	Oct 4, 2012
Publication date	Aug 8, 2017
Grant date	Aug 8, 2017

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 transceiver circuit for frequency division duplex (FDD) communication, comprising:
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;
a duplexer; wherein
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; and
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;
wherein:
the radio transceiver circuit comprises a second receiver, separate from the first receiver, for reception in said first frequency band; and
wherein 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.

2. The radio transceiver circuit according to claim 1 , comprising a first switch operatively connected between the first port of the duplexer and the 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.

3. The radio transceiver circuit according to claim 1 , comprising a second switch operatively connected between the first port of the duplexer and the 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.

4. The radio transceiver circuit according to claim 1 when used in a user equipment for a cellular communication network, wherein said FDD communication includes communication with a network node of the cellular communication network.

5. The radio transceiver circuit according to claim 4 , wherein said second receiver is adapted for direct device-to-device (D2D) communication between said user equipment and another user equipment of said cellular communication network.

6. The radio transceiver circuit according to claim 4 , wherein said cellular communication network is a long-term evolution (LTE) cellular communication network.

7. The radio transceiver circuit according to claim 1 having a time division duplex (TDD) mode, wherein the transmitter and the second receiver operate according to a TDD scheme.

8. The radio transceiver circuit according to claim 1 , wherein the first receiver and the second receiver are adapted to simultaneously receive signals in the second and the first frequency band, respectively.

9. A radio communication apparatus comprising the radio transceiver circuit according to claim 1 .

10. The radio communication apparatus according to claim 9 , wherein the radio communication apparatus is a user equipment for a cellular communication network.

11. The radio communication apparatus according to claim 10 , wherein the cellular communication network is a long-term evolution (LTE) cellular communication network.

Assignees

• Ericsson Telefon Ab L M
• ERICSSON TELEFON AB L M (publ)

Inventors

• Sundstrom Lars
• Mattison Sven
• Wallen Anders

Classifications

• 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

• H04W76/023

  Electricity · mapped topic

• H04J4/00 Primary

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

• H04W72/0453

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title