Digital representations of analog signals and control words using different multi-level modulation formats
AssigneeFuturewei Technologies, Inc.
InventorsHuaiyu Zeng, Xiang Liu
Life of this patent
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Abstract
A method implemented by a transmitter, comprising encoding digital in-phase and quadrature-phase (IQ) data associated with a plurality of analog signals according to a first multi-level modulation format to produce a modulated IQ signal, encoding control information associated with the plurality of analog signals according to a second multi-level modulation format that is different from the first multi-level modulation format to produce a modulated control signal, aggregating the modulated IQ signal and the modulated control signal via time-division multiplexing (TDM) to produce an aggregated TDM signal, and transmitting the aggregated TDM signal over a communication channel.
Claims22
A method implemented by a transmitter, comprising:
- aggregating digital in-phase and quadrature-phase (IQ) data associated with a plurality of analog signals via a first time-division multiplexing (TDM) to produce an aggregated IQ data sequence;
- encoding the aggregated IQ data sequence according to a first multi-level modulation format to produce a modulated IQ signal;
- aggregating control information associated with the plurality of analog signals via the first TDM to produce an aggregated control sequence;
- encoding the aggregated control sequence according to a second multi-level modulation format that is different from the first multi-level modulation format to produce a modulated control signal;
- aggregating the modulated IQ signal and the modulated control signal via a second TDM to produce an aggregated TDM signal;
- and
- transmitting the aggregated TDM signal over a communication channel.
An apparatus comprising:
- a processor configured to:
- aggregate digital in-phase and quadrature-phase (IQ) data associated with a plurality of analog wireless signals via a first time-division multiplexing (TDM) to produce an aggregated IQ data sequence;
- encode the aggregated IQ data sequence according to a first multi-level modulation format to produce a modulated IQ signal;
- aggregate control words (CWs) comprising control information associated with the plurality of analog wireless signals via the first TDM to produce an aggregated control sequence;
- encode the aggregated control sequence according to a second multi-level modulation format that is different from the first multi-level modulation format to produce a modulated CW signal;
- and
- aggregate the modulated IQ signal and the modulated CW signal through time-a second TDM to produce an aggregated TDM signal;
- and
- a frontend coupled to the processor and configured to transmit the aggregated TDM signal over a communication link.
An apparatus comprising:
- a frontend configured to receive a single-carrier signal carrying a multiplexed signal comprising an in-phase and quadrature-phase (IQ) data portion and a control word (CW) portion, wherein the IQ data portion comprises digital IQ data associated with a plurality of analog wireless signals, and wherein the CW portion comprises CWs comprising control information associated with the plurality of analog wireless signals;
- and
- a processor coupled to the frontend and configured to:
- demultiplex the multiplexed signal to obtain the IQ data portion and the CW portion via a first time-division demultiplexing (TDM);
- update a channel equalizer according to the CW portion to obtain an updated channel equalizer;
- perform channel equalization on the multiplexed signal according to the updated channel equalizer;
- obtain the digital IQ data from the IQ data portion according to a first multi-level modulation format;
- obtain the CWs from the CW portion according to a second multi-level modulation format that is different from the first multi-level modulation format;
- separate the digital IQ data into IQ data signals via a second TDM;
- and
- separate the CWs into CW signals via the second TDM.
Dependencies are inferred from the claim text.