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US 8,797,837 B2Granted
System and method for in-phase/quadrature multiplexing
AssigneeSamsung Electronics Co., Ltd.
InventorsXiaochen Li, Chiu Ngo
Life of this patent
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Abstract
Systems and methods for multiplexing signals are disclosed. In one embodiment, the method comprises receiving a first signal having at least a real component, receiving a second signal having at least a real component, generating an in-phase signal based, at least in part, on the first signal, the in-phase signal being real in a first domain, generating a quadrature signal based, at least in part, on the second signal, the quadrature signal being imaginary in the first domain, adding the in-phase signal and the quadrature signal to generate a multiplexed signal, and transmitting the multiplexed signal.
Claims40
A method of multiplexing signals, the method comprising:
- receiving a pulse-amplitude modulated (PAM) orthogonal frequency-division multiplexing (OFDM) signal, the OFDM signal being real in frequency domain;
- receiving a quadrature-amplitude modulated (QAM) cyclic-prefix single-carrier (CP-SC) signal, the CP-SC signal being complex in time domain;
- inverse transforming the OFDM signal so as to generate an in-phase signal, the in-phase signal being complex in the time domain and real in the frequency domain, wherein the in-phase signal comprises a separate and complete signal;
- concatenating complex-even and complex-odd portions of the CP-SC signal so as to generate a quadrature signal, the quadrature signal being complex in the time domain and imaginary in the frequency domain, wherein the quadrature signal comprises a separate and complete signal;
- adding the in-phase signal and the quadrature signal so as to generate a single multiplexed signal;
- and
- transmitting the single multiplexed signal,
- wherein the in-phase signal and the quadrature signal occupy a same time interval and a same frequency band within the single multiplexed signal, and the in-phase signal and the quadrature signal are transmitted simultaneously over the same frequency band in the single multiplexed signal.
5 more elements
A method of multiplexing signals, the method comprising:
- receiving a first signal having at least a real component;
- receiving a second signal having at least a real component;
- generating an in-phase signal based, at least in part, on the first signal, the in-phase signal being real in a first domain, wherein the in-phase signal comprises a separate and complete signal;
- generating a quadrature signal based, at least in part, on the second signal, the quadrature signal being imaginary in the first domain, wherein the quadrature signal comprises a separate and complete signal;
- adding the in-phase signal and the quadrature signal to generate a single multiplexed signal;
- and
- transmitting the single multiplexed signal,
- wherein the in-phase signal and the quadrature signal occupy a same time interval and a same frequency band in the single multiplexed signal, and the in-phase signal and the quadrature signal are transmitted simultaneously over the same frequency band in the single multiplexed signal.
5 more elements
A method of demultiplexing signals, the method comprising:
- receiving a single multiplexed signal, the single multiplexed signal comprising a combined in-phase signal and a quadrature signal, the in-phase signal being real in a first domain and the quadrature signal being imaginary in the first domain, wherein the quadrature signal and the in-phase signal each comprises a separate and complete signal prior to being multiplexed, and the in-phase signal and the quadrature signal are received simultaneously over same frequency band in the single multiplexed signal;
- determining a first signal based on the in-phase signal;
- and
- determining a second signal based on the quadrature signal,
- wherein the in-phase signal and the quadrature signal occupy a same time interval and a same frequency band in the single multiplexed signal.
2 more elements
A system for multiplexing signals, the system comprising:
- a receiver that receives a first signal having at least a real component and a second signal having at least a real component;
- an in-phase generator that generates an in-phase signal based, at least in part, on the first signal, the in-phase signal being real in a first domain, wherein the in-phase signal comprises a separate and complete signal;
- a quadrature generator that generates a quadrature signal based, at least in part, on the second signal, the quadrature signal being imaginary in the first domain, wherein the quadrature signal comprises a separate and complete signal;
- an adder that adds the in-phase and quadrature signals for generating a single multiplexed signal;
- and
- a transmitter that transmits the single multiplexed signal,
- wherein the in-phase signal and the quadrature signal occupy a same time interval and a same frequency band in the single multiplexed signal, and the in-phase signal and the quadrature signal are transmitted simultaneously over the same frequency band in the single multiplexed signal.
4 more elements
A system for demultiplexing signals, the system comprising:
- a receiver that receives a single multiplexed signal, the single multiplexed signal comprising a combined in-phase signal and a quadrature signal, the in-phase signal being real in a first domain and the quadrature signal being imaginary in the first domain, wherein the in-phase signal and the quadrature signal occupy a same time interval and a same frequency band in the single multiplexed signal, wherein the quadrature signal and the in-phase signal each comprises a separate and complete signal prior to being multiplexed, and the in-phase signal and the quadrature signal are received simultaneously over the same frequency band in the single multiplexed signal;
- an in-phase demodulator that determines a first signal based on the in-phase signal;
- and
- a quadrature demodulator that determines a second signal based on the quadrature signal.
1 more element
A system for multiplexing signals, the system comprising:
- means for receiving a first signal having at least a real component;
- means for receiving a second signal having at least a real component;
- means for generating an in-phase signal based, at least in part, on the first signal, the in-phase signal being real in a first domain, wherein the in-phase signal comprises a separate and complete signal;
- means for generating a quadrature signal based, at least in part, on the second signal, the quadrature signal being imaginary in the first domain, wherein the quadrature signal comprises a separate and complete signal;
- means for combining the in-phase signal and the quadrature signal to generate a single multiplexed signal;
- and
- means for transmitting the single multiplexed signal,
- wherein the in-phase signal and the quadrature signal occupy a same time interval and a same frequency band in the single multiplexed signal, and the in-phase signal and the quadrature signal are transmitted simultaneously over the same frequency band in the single multiplexed signal.
5 more elements
A system for demultiplexing signals, the system comprising:
- means for receiving a single multiplexed signal, the single multiplexed signal comprising a combined in-phase signal and a quadrature signal, the in-phase signal being real in a first domain and the quadrature signal being imaginary in the first domain, wherein the in-phase signal and the quadrature signal occupy a same time interval and a same frequency band in the single multiplexed signal, wherein the quadrature signal and the in-phase signal each comprises a separate and complete signal prior to being multiplexed, and the in-phase signal and the quadrature signal are received simultaneously over the same frequency band in the single multiplexed signal;
- means for determining a first signal based on the in-phase signal;
- and
- means for determining a second signal based on the quadrature signal.
1 more element
A non-transitory computer-readable storage medium having instructions encoded thereon which, when executed by one or more processors, performs a method of multiplexing signals, the method comprising:
- receiving a first signal having at least a real component;
- receiving a second signal having at least a real component;
- generating an in-phase signal based, at least in part, on the first signal, the in-phase signal being real in a first domain, wherein the in-phase signal comprises a separate and complete signal;
- generating a quadrature signal based, at least in part, on the second signal, the quadrature signal being imaginary in the first domain, wherein the quadrature signal comprises a separate and complete signal;
- combining the in-phase signal and the quadrature signal to generate a single multiplexed signal;
- and
- transmitting the single multiplexed signal,
- wherein the in-phase signal and the quadrature signal occupy a same time interval and a same frequency band in the single multiplexed signal, and the in-phase signal and the quadrature signal are transmitted simultaneously over the same frequency band in the single multiplexed signal.
5 more elements
A non-transitory computer-readable storage medium having instructions encoded thereon which, when executed by one or more processors, performs a method of demultiplexing signals, the method comprising:
- receiving a single multiplexed signal, the single multiplexed signal comprising a combined in-phase signal and a quadrature signal, the in-phase signal being real in a first domain and the quadrature signal being imaginary in the first domain, wherein the in-phase signal and the quadrature signal occupy a same time interval and a same frequency band in the single multiplexed signal, wherein the quadrature signal and the in-phase signal each comprises a separate and complete signal prior to being multiplexed, and the in-phase signal and the quadrature signal are received simultaneously over the same frequency band in the single multiplexed signal;
- determining a first signal based on the in-phase signal;
- and
- determining a second signal based on the quadrature signal.
1 more element
Dependencies are inferred from the claim text.