Transceiver for reducing current consumption in a wireless communications network

• US 7,873,330 B2
• Filed: 05/30/2007
• Issued: 01/18/2011
• Est. Priority Date: 12/01/2006
• Status: Expired due to Fees

• Current Assignee: Sony Ericsson Mobile Communications AB (Sony Group Corp.)
• Original Assignee: Sony Ericsson Mobile Communications AB (Sony Group Corp.)
• Inventors: Johnson, Phillip Marc, Tudosoiu, Bogdan, Camp, William O.
• Primary Examiner(s): Gesesse; Tilahun
• Application Number:
  US11/755,409
• Publication Number:
  US 20080132176A1
• Time in Patent Office: 1,329 Days
• Field of Search: 455/552.1, 455/101, 455/562.1, 455/561, 455/560, 455/524, 455/525, 455/127.1, 455/128, 455/69, 455/522, 455/73, 455/277.1
• US Class Current: 455/73
• CPC Class Codes: H03F 1/0205 in transistor amplifiers
• CPC Class Codes: H03F 1/0277 Selecting one or more amplifiers from a plurality of amplifiers
• CPC Class Codes: H03F 2200/417 A switch coupled in the output circuit of an amplifier being controlled by a circuit
• CPC Class Codes: H03F 2200/451 the amplifier being a radio frequency amplifier
• CPC Class Codes: H03F 2200/465 Power sensing
• CPC Class Codes: H03F 2203/21157 A filter circuit being added at the output of a power amplifier stage
• CPC Class Codes: H03F 3/189 High-frequency amplifiers, e.g. radio frequency amplifiers
• CPC Class Codes: H03F 3/211 using a combination of several amplifiers H03F3/60 takes precedence
• CPC Class Codes: H03F 3/24 of transmitter output stages

Abstract

A transceiver circuit and a method in a wireless communication network are provided, where a signal power level for a signal received at the transceiver circuit is measured and compared to a predefined threshold power level. At least two groups of power amplifiers may be used, where one group is optimized for high efficiency above the predefined threshold power level, and one group is optimized for high efficiency below the predefined threshold power level. The amplifiers may be used to amplify the received signal depending on the signal power level in relation to the predefined power threshold level. The signal may then be filtered by duplex filters and forwarded to a diversity antenna or a main antenna where it is transmitted over an air interface.

Claims

1. A transceiver for a wireless communication network, comprising:

a processor to determine a signal power for one or more signals to be transmitted;

a switching unit to;

direct the one or more signals, when the determined signal power is above a particular power threshold, to one or more first amplifiers with high efficiency above the particular power threshold and not to one or more second amplifiers with high efficiency below the particular power threshold, and

direct the one or more signals, when the determined signal power is below the particular power threshold, to the one or more second amplifiers and not to the one or more first amplifiers; and

at least one first diversity antenna and at least one first main antenna to transmit the amplified one or more signals from one of the one or more first amplifiers or the one or more second amplifiers.

2. The transceiver according to claim 1,

where the at least one first diversity antenna and the at least one first main antenna are further to receive signals from other devices in the wireless communication network.

3. The transceiver according to claim 2,

where the transceiver further comprises filters to separate the amplified one or more signals to be transmitted via the at least one first diversity antenna and the at least one first main antenna from the received signals received via the at least one first diversity antenna and the at least one first main antenna.

4. The transceiver according to claim 1,

where the transceiver further comprises an isolation arrangement connected to the one or more first amplifiers and the one or more second amplifiers, where the isolation arrangement is to prevent signal reflections of the one or more amplified signals.

5. The transceiver according to claim 1,

where the transceiver further comprises at least one second diversity antenna and at least one second main antenna to receive signals from other devices in the wireless communication network, where the at least one second diversity antenna and the at least one second main antenna differ from the at least one first diversity antenna and the at least one first main antenna.

6. The transceiver according to claim 1,

where the transceiver further comprises a switch to select one of the at least one first diversity antenna or the at least one first main antenna to transmit the amplified one or more signals received from either the one or more first amplifiers or by the one or more second amplifiers.

7. The transceiver according to claim 6,

where the switch further to connect the non-selected one of the at least one of the first diversity antennas or the at least one of the first main antennas to ground.

8. The transceiver according to claim 7,

where the switch is one of:

a singe pole single throw switch,

a double pole double throw switch,

a single pole double throw switch,

a single pole change over switch, or

another type of switch suitable to change between the at least one first diversity antenna and the at least one first main antenna.

9. The transceiver according to claim 8,

where the one or more signals to be amplified by one of the one or more first amplifiers or the one or more second amplifiers are one of:

wideband carrier division multiple access (WCDMA) signals, or

combined global system for mobile communications/enhanced data rates for Global Evolution (GSWEDGE) and WCDMA signals.

10. The transceiver according to claim 1,

where the one or more signals to be amplified by one of the one or more first amplifiers or the one or more second amplifiers are one of:

wideband carrier division multiple access (WCDMA) signals, or

combined global system for mobile communications/enhanced data rates for Global Evolution (GSWEDGE) and WCDMA signals.

11. A method for amplifying signals in a wireless communication network, comprising:

receiving one or more signals;

determining a power at which the one or more received signals are to be sent;

comparing the power at which the one or more received signals are to be sent to a particular power threshold;

when the power at which the one or more received signals are to be sent are above to the particular power threshold, directing the one or more signals to one or more first amplifiers with high efficiency above the power threshold power, and not to one or more second amplifiers with high efficiency below the power threshold;

when the power at which the one or more received signals are to be sent are below to the particular power threshold, directing the one or more signals to the one or more second amplifiers, and not to the one or more first amplifiers;

amplifying the one or more signals by the selected one of the one or more first amplifiers or the one or more second amplifiers;

sending the amplified one or more signals to at least one of at least one first diversity antenna or to at least one main antenna; and

transmitting the amplified one or more signals over the wireless communication network via the at least one of the at least one first diversity antenna or the at least one first main antenna.

12. The method according to claim 11:

where the one or more signals are received, from other devices in the wireless communication network, by at least one of the at least one first diversity antenna or the at least one first main antenna.

13. The method according to claim 12, where the method further comprises:

separating the amplified signals to be transmitted from the received one or more signals.

14. The method according to claim 11, where the method further comprises preventing signal reflections of the one or more amplified signals.

15. The method according to claim 11,

where the one or more signals are received, from other devices in the wireless communication network, by at least one of at least one second diversity antenna or at least one second main antenna, where the at least one second diversity antenna and the at least one second main antenna differ from the at least one first diversity antenna and the at least one first main antenna.

16. The method according to claim 11, where the method further comprises:

selecting one of the at least one first diversity antenna or the at least one first main antenna to transmit the amplified one or more signals; and

connecting the non-selected one of the at least one of the first diversity antennas or the at least one of the first main antennas to ground.

17. The method according to claim 11, where the one or more signals are one of:

wideband carrier division multiple access (WCDMA) signals, or

combined global system for mobile communications/enhanced data rates for Global Evolution (GSWEDGE) and WCDMA signals.