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US 11,387,785 B2Granted
Radio frequency receiver, radio frequency transmitter, and communications device
AssigneeHuawei Technologies Co., Ltd.
InventorsYushan Zheng, Fuquan Zhang, Jinming Wang
Life of this patent
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Abstract
A radio frequency transmitter includes N transmit channels, where each transmit channel includes one nonlinear module, a primary correction circuit, coupled to each of N nonlinear modules that correspond to the N transmit channels, and configured to provide a primary correction signal for the N nonlinear modules, and N secondary correction circuits, where the N secondary correction circuits are coupled to the N nonlinear modules respectively, and each secondary correction circuit is configured to provide a secondary correction signal for a nonlinear module coupled to the secondary correction circuit.
Claims19
A radio frequency transmitter comprising:
- N transmit channels, wherein each transmit channel comprises a nonlinear device, and wherein N is a positive integer greater than 1;
- a primary correction circuit coupled to each nonlinear device of the N transmit channels and configured to provide a common primary correction signal for each nonlinear device of the N transmit channels, wherein the primary correction signal corrects a nonlinear distortion for each nonlinear device of the N transmit channels;
- and
- N secondary correction circuits each coupled to a respective nonlinear device of the N transmit channels, and wherein each of the N secondary correction circuits comprises;
- a dummy circuit, wherein the dummy circuit is a scaled down circuit of the respective nonlinear device of the N transmit channels;
- and
- a feedback circuit coupled to the dummy circuit and configured to:
- detect a bias voltage or a bias current of the dummy circuit;
- update the bias voltage or the bias current of the dummy circuit based on a feedback signal received from the dummy circuit to obtain an updated bias voltage or bias current;
- and
- provide the updated bias voltage or the bias current to the respective nonlinear device of the N transmit channels as a secondary correction signal, wherein the nonlinear device of the N transmit channels operates at the bias voltage or the bias current.
8 more elements
A radio frequency receiver, comprising:
- N receive channels, wherein each receive channel comprises a nonlinear device, and wherein N is a positive integer greater than 1;
- one primary correction circuit in a one-to-N correspondence to the nonlinear device in each receive channel, commonly shared by the N nonlinear device, wherein the primary correction circuit is coupled to each nonlinear device of the N receive channels and configured to provide a commonly shared primary correction signal, for each nonlinear device of each N receive channels;
- and
- N secondary correction circuits in a one-to-one correspondence to the nonlinear device in each receive channel,
- wherein each of the secondary correction circuits is coupled to each nonlinear device of the N receive channels respectively,
- wherein each of the secondary correction circuits is configured to provide a secondary correction signal for each nonlinear device respectively, and
- wherein the secondary correction signal corrects a nonlinear distortion of nonlinear device respectively.
4 more elements
A communication device, comprising:
- an antenna;
- a baseband processor coupled to the antenna;
- and
- a radio frequency receiver coupled to the baseband processor and the antenna and comprising:
- N receive channels, wherein each receive channel comprises a nonlinear device, and wherein N is a positive integer greater than 1;
- one primary correction circuit coupled to each nonlinear device of the N receive channels and configured to provide a primary correction signal to each nonlinear device of the N receive channels;
- and
- N secondary correction circuits,
- wherein each of the secondary correction circuits is coupled to each nonlinear device of the N receive channels respectively,
- wherein each of the secondary correction circuits is configured to provide a secondary correction signal for each nonlinear device respectively,
- wherein the first primary correction signal is configured to adjust the first part of commonly shared power supply for the N nonlinear device in a one-to-N correspondence, and
- wherein the second correction signal is configured to adjust the second part of differentiated power supply for the N nonlinear device in one-to-one correspondence.
9 more elements
Dependencies are inferred from the claim text.