Interference cancellation for wireless communications

A method for processing a composite signal, the composite signal comprising at least a first channel and a second channel overlapping in time with the first channel, the method comprising:

• demodulating a frame of the second channel;
• decoding the first channel after the demodulating the frame of the second channel to generate decoded symbols;
• if the decoding is successful, generating an expected receive signal for the first channel based on the decoded symbols;
• cancelling the expected receive signal from the composite signal to generate a processed composite signal;
• and
• decoding the frame of the second channel based on the processed composite signal.

An apparatus for processing a composite signal, the composite signal comprising at least a first channel and a second channel overlapping at least in part with the first channel, the apparatus comprising:

• a demodulator for demodulating a first portion of the first channel;
• a decoder for decoding the first channel based on the demodulated first portion to generate decoded symbols;
• an interference reconstruction block for, if first channel is successfully decoded, generating an expected receive signal for a second portion of the first channel transmitted after the first portion by re-encoding the decoded symbols;
• and
• a cancellation block for cancelling the expected receive signal from the composite signal to generate a processed composite signal;
• the decoder further configured to decode the second channel based on the processed composite signal.

An apparatus for processing a composite signal, the composite signal comprising at least a first channel and a second channel overlapping in time with the first channel, the apparatus comprising:

• a demodulator for demodulating an entire frame of the second channel;
• a decoder for decoding the first channel to generate decoded symbols after the entire frame of the second channel is demodulated;
• an interference reconstruction block for, if the first channel is successfully decoded, generating an expected receive signal for the first channel based on the decoded symbols;
• a cancellation block for cancelling the expected receive signal from the composite signal to generate a processed composite signal, the decoder further configured to decode the frame of the second channel based on the processed composite signal.

An apparatus for processing a composite signal, the composite signal comprising at least a first channel and a second channel overlapping in time with the first channel, the apparatus comprising:

• means for demodulating a first portion of the first channel;
• means for decoding the first channel based on a first portion of the first channel to generate decoded symbols;
• means for generating an expected receive signal for a second portion of the first channel transmitted after the first portion;
• means for cancelling the expected receive signal from the composite signal to generate a processed composite signal;
• and
• means for decoding the second channel based on the processed composite signal.

An apparatus for processing a composite signal, the composite signal comprising at least a first channel and a second channel overlapping in time with the first channel, the apparatus comprising:

• means for demodulating a frame of the second channel;
• means for decoding the first channel after the receiving the frame of the second channel to generate decoded symbols;
• means for, if the decoding is successful, generating an expected receive signal for the first channel based on the decoded symbols;
• means for cancelling the expected receive signal from the composite signal to generate a processed composite signal;
• and
• means for decoding the frame of the second channel based on the processed composite signal.

A computer program product for processing a composite signal, the composite signal comprising at least a first channel and a second channel overlapping in time with the first channel, the product comprising:

• computer-readable medium comprising:
• code for causing a computer to demodulate a first portion of the first channel;
• code for causing a computer to decode the first channel based on the demodulated first portion to generate decoded symbols;
• code for causing a computer to, if the decoding is successful, generate an expected receive signal for a second portion of the first channel transmitted after the first portion, the generating comprising re-encoding the decoded symbols;
• code for causing a computer to cancel the expected receive signal from the composite signal to generate a processed composite signal;
• and
• code for causing a computer to decode the second channel based on the processed composite signal.

A computer program product for processing a composite signal, the composite signal comprising at least a first channel and a second channel overlapping in time with the first channel, the product comprising:

• computer-readable medium comprising:
• code for causing a computer to demodulate a frame of the second channel;
• code for causing a computer to decode the first channel after the demodulating the frame of the second channel to generate decoded symbols;
• code for causing a computer to, if the decoding is successful, generate an expected receive signal for the first channel based on the decoded symbols;
• code for causing a computer to cancel the expected receive signal from the composite signal to generate a processed composite signal;
• and
• code for causing a computer to decode the frame of the second channel based on the processed composite signal.

A computer program product for processing a power control command for a user in soft handoff, the product comprising:

• computer-readable medium comprising:
• code for causing a computer to receive power control commands from each of a plurality of base stations communicating with the user in soft handoff, each of the power control commands instructing the user to adjust a transmit power for a single power control group (PCG) of a frame;
• and
• code for causing a computer to adjust the transmit power for the PCG down if instructed to do so by any of the power control commands received.