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US 9,001,867 B2Granted
Method and apparatus for managing interference in full-duplex communication
AssigneeQUALCOMM Incorporated
InventorsHua Wang, Achaleshwar Sahai, Zrinka Puljiz, Shailesh Patil, Pablo Alejandro Anigstein, Junyi Li
Life of this patent
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Abstract
A method, an apparatus, and a computer program product for wireless communication are provided. The apparatus receives an intended signal from a first wireless device operating in a full-duplex mode, receives an interfering signal from a second wireless device communicating with the first wireless device, and reduces an interference of the received intended signal caused by the interfering signal by projecting a matrix of the received intended signal onto a space associated with the interfering signal.
Claims20
A method of wireless communication comprising:
- receiving an intended signal from a first wireless device operating in a full-duplex mode;
- receiving an interfering signal from a second wireless device communicating with the first wireless device;
- determining a first channel gain with respect to the first wireless device and a second channel gain with respect to the second wireless device;
- determining a subspace based on the first channel gain and the second channel gain;
- and
- reducing an interference of the received intended signal caused by the interfering signal by projecting a matrix of the received intended signal onto a space associated with the interfering signal,
- wherein the space is the subspace, the subspace being configured to increase a signal to interference-plus-noise ratio (SINR), and
- wherein the subspace is defined as H*(p×ggH+σ2I)−1,
- where H is the first channel gain, p is a power of the interfering signal, g is the second channel gain, gH is a Hermite conjugate of g, I is an identity matrix, and σ2 is a variance of noise at a receiver.
6 more elements
A method of wireless communication comprising:
- receiving a first signal from a first wireless device operating in a full-duplex mode;
- receiving a second signal from a second wireless device communicating the second signal to the first wireless device, the first wireless device receiving the second signal concurrently with transmitting the first signal on a same carrier frequency, the second signal being received concurrently with the first signal on the same carrier frequency, the second signal being an interfering signal;
- determining a first channel gain with respect to the first wireless device and a second channel gain with respect to the second wireless device;
- determining a subspace based on the first channel gain and the second channel gain;
- and
- reducing an interference of the received first signal caused by the interfering signal by projecting a matrix of the received signal onto a space associated with the interfering signal,
- wherein the space is the subspace, the subspace being configured to increase a signal to interference-plus-noise ratio (SINR), and
- wherein the subspace is defined as H*(p×ggH+σ2I)−1,
- where H is the first channel gain, p is a power of the interfering signal, g is the second channel gain, gH is a Hermite conjugate of g, I is an identity matrix, and σ2 is a variance of noise at a receiver.
6 more elements
An apparatus for wireless communication, comprising:
- means for receiving an intended signal from a first wireless device operating in a full-duplex mode;
- means for receiving an interfering signal from a second wireless device communicating with the first wireless device;
- means for determining a first channel gain with respect to the first wireless device and a second channel gain with respect to the second wireless device;
- means for determining a subspace based on the first channel gain and the second channel gain;
- and
- means for reducing an interference of the received intended signal caused by the interfering signal by projecting a matrix of the received intended signal onto a space associated with the interfering signal,
- wherein the space is the subspace, the subspace being configured to increase a signal to interference-plus-noise ratio (SINR), and
- wherein the subspace is defined as H*(p×ggH+σ2I)−1,
- where H is the first channel gain, p is a power of the interfering signal, g is the second channel gain, gH is a Hermite conjugate of g, I is an identity matrix, and σ2 is the variance of noise at a receiver.
6 more elements
An apparatus for wireless communication comprising:
- means for receiving a first signal from a first wireless device operating in a full-duplex mode;
- means for receiving a second signal from a second wireless device communicating the second signal to the first wireless device, the first wireless device receiving the second signal concurrently with transmitting the first signal on a same carrier frequency, the second signal being received concurrently with the first signal on the same carrier frequency, the second signal being an interfering signal;
- means for determining a first channel gain with respect to the first wireless device and a second channel gain with respect to the second wireless device;
- and
- means for determining a subspace based on the first channel gain and the second channel gain;
- and
- means for reducing an interference of the received first signal caused by the interfering signal by projecting a matrix of the received signal onto a space associated with the interfering signal,
- wherein the space is the subspace, the subspace being configured to increase a signal to interference-plus-noise ratio (SINR), and
- wherein the subspace is defined as H*(p×ggH+σ2I)−1,
- where H is the first channel gain, p is a power of the interfering signal, g is the second channel gain, gH is a Hermite conjugate of g, I is an identity matrix, and σ2 is a variance of noise at a receiver.
7 more elements
An apparatus for wireless communication comprising:
- a receiving module configured to:
- receive an intended signal from a first wireless device operating in a full-duplex mode;
- and
- receive an interfering signal from a second wireless device communicating with the first wireless device;
- a determining module configured to:
- determine a first channel gain with respect to the first wireless device and a second channel gain with respect to the second wireless device;
- and
- determine a subspace based on the first channel gain and the second channel gain;
- and
- an interference reducing module configured to reduce an interference of the received intended signal caused by the interfering signal by projecting a matrix of the received intended signal onto a space associated with the interfering signal,
- wherein the space is the subspace, the subspace being configured to increase a signal to interference-plus-noise ratio (SINR), and
- wherein the subspace is defined as H*(p×ggH+σ2I)−1,
- where H is the first channel gain, p is a power of the interfering signal, g is the second channel gain, gH is a Hermite conjugate of g, I is an identity matrix, and σ2 is a variance of noise at a receiver.
10 more elements
An apparatus for wireless communication comprising:
- a receiving module configured to:
- receive a first signal from a first wireless device operating in a full-duplex mode;
- and
- receive a second signal from a second wireless device communicating the second signal to the first wireless device, the first wireless device receiving the second signal concurrently with transmitting the first signal on a same carrier frequency, the second signal being received concurrently with the first signal on the same carrier frequency, the second signal being an interfering signal;
- a determining module configured to:
- determine a first channel gain with respect to the first wireless device and a second channel gain with respect to the second wireless device;
- and
- determine a subspace based on the first channel gain and the second channel gain;
- and
- an interference reducing module configured to reduce an interference of the received first signal caused by the interfering signal by projecting a matrix of the received signal onto a space associated with the interfering signal,
- wherein the space is the subspace, the subspace being configured to increase a signal to interference-plus-noise ratio (SINR), and
- wherein the subspace is defined as H*(p×ggH+σ2I)−1,
- where H is the first channel gain, p is a power of the interfering signal, g is the second channel gain, gH is a Hermite conjugate of g, I is an identity matrix, and σ2 is a variance of noise at a receiver.
10 more elements
A computer program product, comprising:
- a non-transitory computer-readable medium comprising code for:
- receiving an intended signal from a first wireless device operating in a full-duplex mode;
- receiving an interfering signal from a second wireless device communicating with the first wireless device;
- determining a first channel gain with respect to the first wireless device and a second channel gain with respect to the second wireless device;
- determining a subspace based on the first channel gain and the second channel gain;
- and
- reducing an interference of the received intended signal caused by the interfering signal by projecting a matrix of the received intended signal onto a space associated with the interfering signal,
- wherein the space is the subspace, the subspace being configured to increase a signal to interference-plus-noise ratio (SINR), and
- wherein the subspace is defined as H*(p×ggH+σ2)−1,
- where H is the first channel gain, p is a power of the interfering signal, g is the second channel gain, gH is a Hermite conjugate of g, I is an identity matrix, and σ2 is a variance of noise at a receiver.
7 more elements
A computer program product, comprising:
- a non-transitory computer-readable medium comprising code for:
- receiving a first signal from a first wireless device operating in a full-duplex mode;
- receiving a second signal from a second wireless device communicating the second signal to the first wireless device, the first wireless device receiving the second signal concurrently with transmitting the first signal on a same carrier frequency, the second signal being received concurrently with the first signal on the same carrier frequency, the second signal being an interfering signal;
- determining a first channel gain with respect to the first wireless device and a second channel gain with respect to the second wireless device;
- determining a subspace based on the first channel gain and the second channel gain;
- and
- reducing an interference of the received first signal caused by the interfering signal by projecting a matrix of the received signal onto a space associated with the interfering signal,
- wherein the space is the subspace, the subspace being configured to increase a signal to interference-plus-noise ratio (SINR), and
- wherein the subspace is defined as H*(p×ggH+σ2I)−1,
- where H is the first channel gain, p is a power of the interfering signal, g is the second channel gain, gH is a Hermite conjugate of g, I is an identity matrix, and σ2 is a variance of noise at a receiver.
7 more elements
Dependencies are inferred from the claim text.