Methods and apparatus for reducing cochannel interference in a mixed-rate communication system

A method for receiving a signal in a mixed-rate communication system, said communication system having at least one high-rate user and a plurality of low-rate users, said method comprising the steps of:

• processing said signal with an antenna array processing technique only for said at least one high-rate user, said processing step producing a remaining signal that reduces the effects of said high-rate user;
• and
• decoding said remaining signal for said low-rate users.

A method for receiving a signal in a nixed-rate communication system, said communication system having at least one high-rate user and a plurality of low-rate users, said method comprising the steps of:

• processing said signal with a multiuser detection technique only for said at least one high-rate user, said processing step producing a remaining signal that reduces the effects of said high-rate user;
• and
• decoding said remaining signal for said low-rate users.

A receiver for receiving a signal in a mixed-rate communication system, said communication system having at least one high-rate user and a plurality of low-rate users, said receiver comprising:

• a processor that processes said signal with an antenna array processing technique only for said at least one high-rate user, said processor producing a remaining signal that reduces the effects of said high-rate user;
• and
• one or more detectors for decoding said remaining signal to detect said low-rate users.

A receiver for receiving a signal in a mixed-rate communication system, said communication system having at least one high-rate user and a plurality of low-rate users, said receiver comprising:

• a processor that processes said signal with a multiuser detection technique only for said at least one high-rate user, said processor producing a remaining signal that reduces the effects of said high-rate user;
• and
• one or more detectors for decoding said remaining signal to detect said low-rate users.

A receiver for receiving a signal in a mixed-rate communication system, said communication system having at least one high-rate user and a plurality of low-rate users, said receiver comprising:

• one or more processors that processes said signal with an antenna array processing detection technique and a multiuser detection technique only for said at least one high-rate user, said processors producing a remaining signal that reduces the effects of said high-rate user;
• and
• one or more detectors for decoding said remaining signal to detect said low-rate users.

A receiver for receiving a signal in a mixed-rate communication system, said communication system having at least one high-rate user and a plurality of low-rate users, said receiver comprising:

• means for processing said signal with an antenna array processing detection technique only for said at least one high-rate user, said means for processing producing a remaining signal that reduces the effects of said high-rate user;
• and
• means for decoding said remaining signal to detect said low-rate users.

A receiver for receiving a signal in a mixed-rate communication system, said communication system having at least one high-rate user and a plurality of low-rate users, said receiver comprising:

• means for processing said signal with a multiuser detection technique only for said at least one high-rate user, said means for processing producing a remaining signal that reduces the effects of said high-rate user;
• and
• means for decoding said remaining signal to detect said low-rate users.

A method for receiving a signal in a mixed-rate communication system, said communication system having at least one high-power user and a plurality of low-power users, said method comprising the steps of:

• identifying said high-power users;
• and
• reducing the interference effects only for said at least one high-power user.