Mitigation of communication signal interference using adaptive transmit power
AssigneeMassachusetts Institute of Technology
InventorRachel E. Learned
Life of this patent
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Abstract
In some embodiments, a method for mitigating interference in a channel having multiple users includes: transmitting, by a transmitter, a signal of interest (SOI) to a sequential interference cancellation (SIC) receiver at a transmit power; determining a packet drop rate as seen by the receiver; and decreasing the transmit power in response to determining the packet drop rate exceeds a predetermined maximum packet drop rate. The transmitter's coding rate and/or modulation level may also be lowered based on the decrease in transmit power.
Claims22
A method for mitigating interference in a channel having multiple users, the method comprising:
- transmitting, by a transmitter, a signal of interest (SOI) to a sequential interference cancellation (SIC) receiver at a transmit power;
- determining, by the transmitter, a packet drop rate at the receiver;
- and
- decreasing the transmit power in response to determining the packet drop rate is greater than a predetermined maximum packet drop rate.
A method of mitigating communication interference, the method comprising:
- (a) transmitting, by a transmitter to a sequential interference cancellation (SIC) receiver, a signal of interest (SOI), the transmitter transmitting at a current transmit power;
- (b) determining, by the transmitter, a packet drop rate at the SIC receiver;
- (c) decreasing, by the transmitter, the current transmit power if the determined packet drop rate at the SIC receiver is greater than a predetermined maximum packet drop rate;
- and
- repeating steps (a) to (c).
A method of mitigating communication interference, the method comprising:
- (a) transmitting, by a transmitter to a sequential interference cancellation (SIC) receiver, a signal of interest (SOI) comprising a plurality of packets, at a current transmit power, a current coding rate, and a current modulation level;
- (b) determining, by the transmitter, a packet drop rate at the SIC receiver;
- (c) decreasing, by the transmitter, the current transmit power if the determined packet drop rate is greater than a predetermined maximum packet drop rate and changing at least one of the current coding rate and the current modulation level by an amount corresponding to the decrease in the current transmit power;
- and
- repeating steps (a) to (c).
A method of mitigating communication interference between a transmitter and a sequential interference cancellation (SIC) receiver, the method comprising:
- (a) transmitting, by the transmitter to the SIC receiver, a signal of interest (SOI), the SOI comprising a plurality of packets, the transmitter transmitting the SOI at a current transmit power, a current coding rate, and a current modulation level;
- (b) determining, by the transmitter, a packet drop rate at the SIC receiver;
- (c) in response to the packet drop rate being greater than a predetermined maximum packet drop rate, decreasing the current transmit power and changing at least one of the current coding rate and the current modulation level by an amount corresponding to the decrease in the current power;
- (d) transmitting, by the transmitter to the SIC receiver, the SOI at the decreased current transmit power and the changed at least one of the current coding rate and the current modulation level;
- (e) repeating (b) to (d) until the packet drop rate is less than the predetermined maximum packet drop rate;
- (f) determining, by the transmitter, a throughput between the transmitter and the SIC receiver;
- (g) in response to the throughput being less than a predetermined minimum throughput value, increasing at least one of the current coding rate and the current modulation level;
- (h) transmitting, by the transmitter to the SIC receiver, the SOI at the increased coding rate or modulation level;
- and
- (i) repeating (f) to (h) until the throughput is greater than the predetermined minimum throughput value.
Dependencies are inferred from the claim text.