Methods, apparatuses, systems, devices, and computer program products directed to low latency bandwidth efficient communications with low duplex spacing

A method for communicating over a channel, the method comprising:

• transmitting, via one or more transmit antennas, a transmit signal using a first bandwidth fragment of the channel that is bounded by, and overlaps or has low duplex spacing with, a pair of non-overlapping bandwidth fragments of the channel, wherein pair of non-overlapping bandwidth fragments are symmetrically offset from a reference frequency associated with the channel;
• receiving, via one or more receive antennas, a receive signal from the channel while the transmit signal is being transmitted, wherein the receive signal comprises a desired signal transmitted using the pair of non-overlapping bandwidth fragments, wherein the receive signal further comprises (i) a first unwanted sideband resulting from transmission on a first of the pair of non-overlapping bandwidth fragments, and (ii) a second unwanted sideband resulting from transmission on a second of the pair of non-overlapping bandwidth fragments, wherein the first unwanted sideband is coincident with the second non-overlapping bandwidth fragment, and wherein the second unwanted sideband is coincident with the first non-overlapping bandwidth fragment;
• generating a cancellation signal based on the transmit signal and a channel response;
• and
• using the cancellation signal to reduce one or more portions of the receive signal that correspond to the transmit signal.

A wireless communication device comprising a transmitter, a receiver, one or more receive antennas, one or more transmit antennas and signal compensation circuitry, wherein:

• the transmitter is configured to transmit, via one or more antennas, a transmit signal using a pair of non-overlapping bandwidth fragments of the channel, wherein the pair of non-overlapping fragments are symmetrically offset from a reference frequency associated with the channel;
• the receiver is configured to receive, via the one or more antennas, a receive signal from the channel while the transmit signal is being transmitted, wherein the receive signal comprises a desired signal transmitted using a first bandwidth fragment of the channel, wherein the first bandwidth fragment is bounded by, and overlaps or has low duplex spacing with, the pair of non-overlapping bandwidth fragments, wherein the receive signal further comprises (i) a first unwanted sideband resulting from transmission on a first of the pair of non-overlapping bandwidth fragments, and (ii) a second unwanted sideband resulting from transmission on a second of the pair of non-overlapping bandwidth fragments, wherein the first unwanted sideband is coincident with the second non-overlapping bandwidth fragment, and wherein the second unwanted sideband is coincident with the first non-overlapping bandwidth fragment;
• the signal compensation circuitry is configured to:
• generate a cancellation signal based on the transmit signal and a channel response;
• and
• use the cancellation signal to reduce one or more portions of the receive signal that correspond to the transmit signal.

A wireless communication device comprising a transmitter, a receiver, one or more receive antennas, one or more transmit antennas and signal compensation circuitry, wherein:

• the transmitter is configured to transmit, via one or more transmit antennas, a transmit signal using a first bandwidth fragment of the channel that is bounded by, and overlaps or has low duplex spacing with, a pair of non-overlapping bandwidth fragments of the channel, wherein pair of non-overlapping bandwidth fragments are symmetrically offset from a reference frequency associated with the channel;
• the receiver is configured to receive, via one or more receive antennas, a receive signal from the channel while the transmit signal is being transmitted, wherein the receive signal comprises a desired signal transmitted using the pair of non-overlapping bandwidth fragments, wherein the receive signal further comprises (i) a first unwanted sideband resulting from transmission on a first of the pair of non-overlapping bandwidth fragments, and (ii) a second unwanted sideband resulting from transmission on a second of the pair of non-overlapping bandwidth fragments, wherein the first unwanted sideband is coincident with the second non-overlapping bandwidth fragment, and wherein the second unwanted sideband is coincident with the first non-overlapping bandwidth fragment;
• the signal compensation circuitry is configured to:
• generate a cancellation signal based on the transmit signal and a channel response;
• and
• use the cancellation signal to reduce one or more portions of the receive signal that correspond to the transmit signal.