Dynamic interference alignment for partially connected quasi-static MIMO interference channel

A device, comprising:

• an antenna configured to transmit a signal via a multiple input multiple output channel having a partially connected state in accordance with an interference alignment that alleviates interference associated with transmission of the signal via the multiple input multiple output channel in connection with other signals communicated between transmitter and receiver pairs operating via the multiple input multiple output channel;
• and
• an encoder configured to encode the signal with a beamforming filter to effectuate the interference alignment, wherein the beamforming filter is configured based on restrictions for subspaces of the multiple input multiple output channel determined based on the partially connected state of the multiple input multiple output channel, wherein the restrictions for the subspaces are based on a determination of feasibility of the interference alignment, and wherein the determination of the feasibility of the interference alignment is based on a number of freedoms associated with the beamforming filter being determined to satisfy a defined function with respect to a number of constraints associated with performance of the interference alignment.

A device, comprising:

• an antenna configured to receive a signal in multiple input multiple output channel having a partially connected state in accordance with an interference alignment that alleviates interference associated with reception of the signal in the multiple input multiple output channel in association with other signals being communicated between transmitter and receiver pairs operating in the multiple input multiple output channel;
• and
• a decoder configured to decode the signal with a decoding filter to effectuate the interference alignment, wherein the decoding filter is adapted to effectuate the interference alignment based on restrictions for subspaces of the multiple input multiple output channel determined based on the partially connected state of the multiple input multiple output channel, wherein the restrictions for the subspaces are based on a determination of feasibility of the interference alignment, and wherein the determination of the feasibility of the interference alignment is based on a number of freedoms associated with the decoding filter being determined to outweigh a number of constraints associated with performance of the interference alignment.

A method, comprising:

• transmitting, by a device comprising a processor, a signal in a multiple input multiple output channel having a partially connected state in accordance with an interference alignment that alleviates interference associated with transmission of the signal in the multiple input multiple output channel concurrently with other signals communicated between transmitter and receiver pairs operating in the multiple input multiple output channel;
• and
• encoding, by the device, the signal using a precoder to effectuate the interference alignment, wherein the precoder is configured based on restrictions for subspaces of the multiple input multiple output channel determined based on the partially connected state of the multiple input multiple output channel, wherein the restrictions for the subspaces are based on a determination of feasibility of the interference alignment, and wherein the determination of the feasibility of the interference alignment is based on a number of freedoms associated with a beamforming filter being determined to be greater than or equal to a number of constraints associated with performance of the interference alignment.

A method, comprising:

• receiving, by a device comprising a processor, a signal through a multiple input multiple output channel having a partially connected state in accordance with an interference alignment that alleviates interference associated with reception of the signal in the multiple input multiple output channel in association with other signals communicated between transmitter and receiver pairs operating in the multiple input multiple output channel;
• and
• decoding, by the device, the signal using a decorrrelator to effectuate the interference alignment, wherein the decorrelator effectuates the interference alignment based on restrictions for subspaces of the multiple input multiple output channel determined based on the partially connected state of the multiple input multiple output channel, and wherein the restrictions for the subspaces are based on a determination of feasibility of the interference alignment, and wherein the determination of the feasibility of the interference alignment is based on a number of freedoms associated with a beamforming filter being determined to be greater than or equal to a number of constraints associated with performance of the interference alignment.

The non-transitory computer readable storage medium of clam 38, wherein the determining the restrictions further comprises determining the restrictions to reduce the number of constraints associated with performing the interference alignment while the multiple input multiple output channel is in the partially connected state.

The non-transitory computer readable storage medium of clam 38, wherein the determining the restrictions further comprises generating a plurality of potential restrictions and selecting the restrictions from the plurality of potential restrictions that decrease the number of constraints associated with performing the interference alignment while the multiple input multiple output channel is in the partially connected state.

The non-transitory computer readable storage medium of clam 38, wherein the determining the restrictions further comprises determining common null spaces of the signal subspaces and determining the restrictions based on the common null spaces, and wherein the common null spaces are based on the partially connected state of the multiple input multiple output channel.

The non-transitory computer readable storage medium of clam 38, wherein the determining the restrictions further comprises determining the restrictions that maximize the number of freedoms associated with the beamforming filters minus the number of constraints associated with performing the interference alignment while the multiple input multiple output channel is in the partially connected state.

The non-transitory computer readable storage medium of clam 38, wherein the determining the restrictions further comprises determining the restrictions that maximize the number of freedoms associated with the zero-forcing filters minus the number of constraints associated with performing the interference alignment while the multiple input multiple output channel is in the partially connected state.