Interference cancellation in variable codelength systems for multi-access communication

A non-transitory computer-readable storage medium, comprising a plurality of instructions, that in response to being executed, result in a receiver:

• despreading a received signal using a plurality of descendent codes of a first code associated with an interfering signal having a first rate to obtain, for the interfering signal, a plurality of subchannels having a second rate that is lower than the first rate;
• generating a plurality of symbol estimates for the plurality of subchannels;
• and
• reducing an interference effect of the interfering signal on the received signal based on the plurality of symbol estimates for the plurality of subchannels.

A receiver, comprising:

• a front end configured to receive a multi-rate signal comprising an interfering signal associated with a first code and a first rate;
• an analysis module configured to despread the signal using a plurality of descendent codes of the first code to obtain, for the interfering signal, a plurality of subchannels having a second rate that is lower than the first rate, and generate a plurality of symbol estimates for the plurality of subchannels;
• and
• an interference canceller configured to reduce an interference effect of the interfering signal on the received signal based on the plurality of symbol estimates for the plurality of subchannels.