MODE SWITCHING AVAILABLE WIRELESS TRANSCEIVER

• US 20150229463A1
• Filed: 02/05/2015
• Published: 08/13/2015
• Est. Priority Date: 02/12/2014
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: OH, Jung Hoon, KWON, Heon Kook
• Granted Patent: US 9,641,213 B2
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: H04B 1/0057 using diplexing or multiplexing filters for selecting the desired band
• CPC Class Codes: H04B 1/48 in circuits for connecting transmitter and receiver to a common transmission path, e.g. by energy of transmitter H04B1/46 takes precedence
• CPC Class Codes: H04L 5/143 for modulated signals H04L5/1469 takes precedence
• CPC Class Codes: H04L 5/1469 using time-sharing

Abstract

Provided is a transceiver. The transceiver includes: a transmission unit modulating at least one of a plurality of baseband transmit signals to an RF band and amplifying the modulated at least one; a duplexer transmitting transmit signals outputted from the transmission unit to an antenna by selecting a signal in a downlink frequency band or an uplink frequency band or filtering a receive signal received from the antenna by the downlink frequency band or the uplink frequency band; a reception unit demodulating the receive signals in the downlink frequency band or the uplink frequency band from the duplexer into at least one baseband signal; a first switch delivering a transmit signal provided from the transmission unit to a first RF band filter of the duplexer in a first communication mode and a second communication mode; and a second switch delivering a first receive signal delivered from a second RF band filter of the duplexer to the reception unit in the first communication mode and a third communication mode, wherein each of the transmission unit and the reception unit includes one power amplifier and one low noise amplifier.

Claims

1. A transceiver comprising:

a transmission unit modulating at least one of a plurality of baseband transmit signals to an RF band and amplifying the modulated at least one;

a duplexer transmitting transmit signals outputted from the transmission unit to an antenna by selecting a signal in a downlink frequency band or an uplink frequency band or filtering a receive signal received from the antenna by the downlink frequency band or the uplink frequency band;

a reception unit demodulating the receive signals in the downlink frequency band or the uplink frequency band from the duplexer into at least one baseband signal;

a first switch delivering a transmit signal provided from the transmission unit to a first RF band filter of the duplexer in a first communication mode and a second communication mode; and

a second switch delivering a first receive signal delivered from a second RF band filter of the duplexer to the reception unit in the first communication mode and a third communication mode,

wherein each of the transmission unit and the reception unit comprises one power amplifier and one low noise amplifier.

2. The transceiver of claim 1, wherein in the second communication mode, the second switch delivers a transmit signal from the transmission unit to the second RF band filter of the duplexer.

3. The transceiver of claim 1, wherein in the third communication mode, the first switch delivers a second receive signal provided from the first RF band filter of the duplexer to the reception unit.

4. The transceiver of claim 1, wherein the transmission unit comprises a transmission switch terminal selecting at least one of a plurality of RF band transmit signals according to a communication mode and providing the selected at least one to the power amplifier.

5. The transceiver of claim 4, wherein the transmission switch terminal comprises:

a mixing switch mixing the plurality of RF band transmit signals according to the communication mode; and

a selection switch selecting one of the plurality of RF band transmit signals or the mixed transmit signal according to the communication mode.

6. The transceiver of claim 5, wherein each of the plurality of RF band transmit signals comprises signals modulated to the uplink or downlink frequency band.

7. The transceiver of claim 1, wherein the reception unit comprises:

the low noise amplifier amplifying RF band receive signals provided from the first switch or the second switch;

a reception switch terminal selecting at least one of the RF band receive signals according to a communication mode; and

a plurality of baseband filters demodulating the receive signals into a baseband.

8. The transceiver of claim 7, wherein the reception switch terminal comprises:

a selection switch delivering the RF band receive signals to one of the plurality of baseband filters or delivering the RF receive signals to the plurality of baseband filters simultaneously, according to the communication mode; and

a distribution switch distributing receive signals in an RF band provided from the selection switch into the plurality of baseband filters simultaneously according to the communication mode.

9. The transceiver of claim 8, wherein the reception unit comprises mixers demodulating the RF band receive signals into a baseband.

10. The transceiver of claim 1, wherein

the first communication mode corresponds to a frequency division duplex (FDD) mode;

the second communication mode corresponds to a time division duplex (TDD) transmission mode; and

the third communication mode corresponds to a TDD reception mode.

11. A transceiver comprising:

a transmission switch terminal selecting one or all of a first transmit signal of a downlink frequency and a second transmit signal of an uplink frequency;

a power amplifier amplifying a transmit signal delivered from the transmission switch terminal;

a duplexer separating the amplified transmit signal into a downlink or uplink frequency band and transmitting the separated signal to an antenna or filtering a receive signal received from the antenna by the downlink or uplink frequency band;

a low noise amplifier amplifying receive signals in the downlink or uplink frequency band from the duplexer;

a reception switch terminal distributing a receive signal outputted from the low noise amplifier into first and second demodulation units demodulating signals into the downlink or uplink frequency band;

a first switch delivering a transmit signal of the power amplifier to a first RF band filter of the duplexer in a frequency division mode and a time division transmission mode; and

a second switch delivering a first receive signal delivered from a second RF band filter of the duplexer to the low noise amplifier in the frequency division mode and a time division reception mode.

12. The transceiver of claim 11, wherein the second switch delivers a transmit signal from the power amplifier to a second RF band filter of the duplexer in the time division transmission mode.

13. The transceiver of claim 11, wherein the first switch delivers a second receive signal provided from the first RF band filter of the duplexer to the low noise amplifier in the time division reception mode.

14. The transceiver of claim 11, wherein the transmission switch terminal comprises:

a selection switch delivering the first transmit signal to the power amplifier in the frequency division mode; and

a mixing switch mixing the first transmit signal and the second transmit signal and delivering the mixed signal to the selection switch in the time division transmission mode,

wherein the selection switch delivers a signal delivered from the mixing switch to the power amplifier in the time division transmission mode.

15. The transceiver of claim 11, wherein the reception switch terminal comprises:

a selection switch delivering an output of a low noise amplifier to the first demodulation unit demodulating signals into the uplink frequency band in the frequency division mode; and

a distribution switch distributing the output of the low noise amplifier into the first demodulation unit and the second demodulation unit demodulating signals by the uplink and downlink frequency bands, respectively in the time division reception mode.