US 2014/0369442 A1Published application

Receiver, transmitter, feedback device, transceiver and signal processing method

AssigneeHuawei Technologies Co., Ltd.

InventorBaoping HUANG

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Abstract

The present invention provides a receiver, a transmitter, a transmitter feedback device, and corresponding methods. The feedback device includes: a multi-channel frequency selection band-pass circuit, configured to receive a multi-frequency band feedback signal, and output a feedback signal of each frequency band in a time-division manner; a feedback local oscillator, configured to provide feedback local oscillation corresponding to each frequency band in a time-division manner; a mixer, configured to mix the feedback signal of each frequency band from the multi-channel frequency selection band-pass circuit and the feedback local oscillation corresponding to each frequency band from the feedback local oscillator, and output an intermediate frequency signal of each frequency band in a time-division manner. A solution in which only one set of signal processing channels is used to process the signals of multiple frequency bands in the uplink, the downlink or both the uplink and downlink is provided.

Claims13

Dependent claims

A transmitter, comprising:

a digital frequency shifter, configured to perform, on baseband I digital signals and baseband Q digital signals of multiple frequency bands, digital frequency shift to a frequency corresponding to each frequency band;
wherein the multiple frequency bands comprise at least two frequency bands;
a combiner, configured to combine the I digital signals of the multiple frequency bands, which are after digital frequency shift, into a multi-frequency band combined I digital signal, and combine the Q digital signals of multiple frequency bands, which are after digital frequency shift, into a multi-frequency band combined Q digital signal;
a first digital analog converter, configured to convert the multi-frequency band combined I digital signal into a multi-frequency band combined I analog signal;
a second digital analog converter, configured to convert the multi-frequency band combined Q digital signal into a multi-frequency band combined Q analog signal;
a first reconstruction filter, configured to filter the multi-frequency band combined I analog signal;
a second reconstruction filter, configured to filter the multi-frequency band combined Q analog signal;
a downlink local oscillator, configured to provide local oscillation;
a quadrature modulator, configured to modulate the multi-frequency band combined I analog signal and the multi-frequency band combined Q analog signal into radio frequency signal of multi-frequency bands by using the local oscillation provided by the downlink local oscillator;
and
an amplifier, configured to amplify the radio frequency signal of multi-frequency bands.

8 more elements

Dependencies are inferred from the claim text.

Facts

Application: 14/474,601Filed 2 Sep 2014
Priority: CN 201010000798.120 Jan 2010
Published: 18 Dec 2014
Term ends: Not estimatedThe source records don’t support an estimate.

Classification14 codes

H04L 27/12
Frequency-modulated carrier systems, i.e. using frequency-shift keying: modulator circuits; Transmitter circuits
H03F 1/34
Details of amplifiers with only discharge tubes, only semiconductor devices or only unspecified devices as amplifying elements:…
H03F 3/24
Power amplifiers, e.g. Class B amplifiers, Class C amplifiers: of transmitter output stages
H04B 1/0475
Circuits: with means for limiting noise, interference or distortion

Family

Application13/553,235Continuation · filed 19 Jul 2012
Application14/474,601Continuation
US 2012/0281550 A1Published application
US 8,854,989 B2Related patent
US 9,473,338 B2Related patent
US 2014/0369442 A1This patent

From the US filing history. Foreign family members aren’t listed.