Method and apparatus for regenerative based interference cancellation within a communication system

A method for receiving in a communication system, comprising:

• determining a plurality of soft-decision regeneration factors associated with a plurality of users, each soft-decision regeneration factor from the plurality of soft-decision regenerator factors being uniquely associated with each user from the plurality of users;
• and
• canceling interference, for a first user from the plurality of users, from a received signal based on the plurality of soft-decision regeneration factors excluding the soft-decision regeneration factor associated with the first user.

An apparatus, comprising:

• a first regeneration-factor processor, the first regeneration-factor processor determining a regeneration factor associated with a first user based on a received signal;
• and
• a second regeneration-factor processor coupled to the first regeneration-factor processor, the second regeneration-factor processor determining a regeneration factor associated with a second user based on the received signal, a frequency range associated with the first user having at least a portion overlapping with at least a portion of a frequency range associated with the second user, a time range associated with the first user having at least a portion overlapping with at least a portion of a time range associated with the second user.

An apparatus, comprising:

• a plurality of regeneration-factor generators determining a plurality of regeneration factors associated with a plurality of users based on a received signal to produce a plurality of regeneration-factor signals, a frequency range associated with a first user from the plurality of users having at least a portion overlapping with at least a portion of a frequency range associated with a second user from the plurality of users, a time range associated with the first user from the plurality of users having at least a portion overlapping with at least a portion of a time range associated with the second user from the plurality of users;
• and
• a plurality of modified-signal generators coupled to the plurality of regenerator-factor processors, the plurality of modified-signal generators receiving the plurality of regenerator-factor signals from the plurality regeneration-factor processors and receiving a plurality of regenerated signals, the plurality of modified-signal generators modifying the plurality of regenerated signals based on the regeneration-factor signals.

An apparatus, comprising:

• means for determining a regeneration factor associated with the first user based on a received signal;
• and
• means for determining a regeneration factor associated with the second user based on the received signal, the regeneration factor associated with the first user being different from the regeneration factor associated with the second user, a frequency range associated with the first user having at least a portion overlapping with at least a portion of a frequency range associated with the second user, a time range associated with the first user having at least a portion overlapping with at least a portion of a time range associated with the second user.

A method for performing channel estimation within a communication system, comprising:

• determining a cutoff frequency based on an expected Doppler frequency associated with a first user;
• and
• estimating a phase and an amplitude of each multipath component associated with a received signal based on a pilot signal and a low-pass filter having the cutoff frequency.

A method for performing channel estimation within a communication system, comprising:

• determining a cutoff frequency based on an expected Doppler frequency associated with a first user;
• and
• low-pass filtering a plurality of rake finger signals based on a pilot signal and the determined cutoff frequency to produce an estimated phase and an estimated amplitude of each multipath component associated with a received signal.