Interference cancellation in a signal

A mobile station, said mobile station for receiving at least two radio frequency (RF) signals from the same source and comprising:

• a receiver for receiving said RF signals;
• means for converting said RF signal to an intermediate frequency (IF) signal;
• means for sampling said IF analog signal to generate a digital IF signal, said digital signal having a data component and an interference component;
• means for canceling co-channel interference in said digital signal by projecting said digital signal onto a subspace orthogonal to a subspace of said interference component and multiplying this projection with said digital signal;
• and
• means for acquisition and tracking of said projected digital signal.

A method for receiving signals in a receiver having at least one receiver circuit, the method comprising the steps of:

• receiving at least two radio frequency (RF) signals from the same source;
• converting said RF signal to an intermediate frequency (IF) signal;
• sampling said IF analog signal to generate a digital IF signal, said digital signal having a data component and an interference component;
• and
• canceling co-channel interference in said digital signal by projecting said digital signal onto a subspace orthogonal to a subspace of said interference component and multiplying this projection with said digital signal.

A communication system having a reverse link comprising:

• at least one mobile station which transmits radio frequency (RF) signals;
• and
• at least one base station, said base station including:
• a receiver for receiving at least two RF signals from said mobile station;
• means for converting said RF signal to an intermediate frequency (IF) signal;
• means for sampling said IF analog signal to generate a digital IF signal, said digital signal having a data component and an interference component;
• means for canceling co-channel interference in said digital signal by projecting said digital signal onto a subspace orthogonal to a subspace of said interference component and multiplying this projection with said digital signal;
• and
• means for acquisition and tracking of said projected digital signal.

A base station, said base station for receiving at least two radio frequency (RF) signals from the same source and comprising:

• a receiver for receiving said RF signals;
• means for converting said RF signal to an intermediate frequency (IF) signal;
• means for sampling said IF analog signal to generate a digital IF signal, said digital signal having a data component and an interference component;
• means for canceling co-channel interference in said digital signal by projecting said digital signal onto a subspace orthogonal to a subspace of said interference component and multiplying this projection with said digital signal;
• means for acquisition and tracking of said projected digital signal.

A method for receiving signals in a receiver having at least one receiver circuit, the method comprising the steps of:

• receiving at least two radio frequency (RF) signals broadcast from one mobile receiver;
• converting said RF signal to an intermediate frequency (IF) signal;
• sampling said IF analog signal to generate a digital IF signal, said digital signal having a data component and an interference component;
• and
• canceling co-channel interference in said digital signal by projecting said IF signal onto a subspace orthogonal to a subspace of said interference component and multiplying this projection with said digital signal.

A communication system having a forward link comprising:

• at least one base station which transmits radio frequency (RF) signals;
• and
• at least one mobile station, said mobile station including:
• a receiver for receiving said RF signals;
• means for converting said RF signal to an intermediate frequency (IF) signal;
• means for sampling said IF analog signal to generate an IF digital signal, said digital signal having a data component and an interference component;
• means for canceling cross-channel interference in said digital signal by projecting said digital signal onto a subspace orthogonal to a subspace of said interference component and multiplying this projection with said digital signal;
• and
• means for acquisition and tracking of said projected digital signal.

A mobile station, said mobile station for receiving a radio frequency (RF) signal and comprising:

• a receiver for receiving said RF signals;
• means for converting said RF signal to an intermediate frequency (IF) signal;
• means for sampling said IF analog signal to generate a digital IF signal, said digital signal having a data component and an interference component;
• means for canceling cross-channel interference in said digital signal by projecting said digital signal onto a subspace orthogonal to a subspace of said interference component and multiplying this projection with said digital signal;
• and
• means for acquisition and tracking of said projected digital signal.

A method for receiving signals in a receiver having at least one receiver circuit, the method comprising the steps of:

• receiving at least one radio frequency (RF) signal;
• converting said RF signal to an intermediate frequency (IF) signal;
• sampling said IF analog signal to generate a digital IF signal, said digital signal having a data component and an interference component;
• and
• canceling cross-channel interference in said digital signal by projecting said digital signal onto a subspace orthogonal to a subspace of said interference component and multiplying this projection with said digital signal.

A communication system having a reverse link comprising:

• at least one mobile station which transmits radio frequency (RF) signals;
• and
• at least one base station, said base station including:
• a receiver for receiving said RF signals;
• means for converting said RF signal to an intermediate frequency (IF) signal;
• means for sampling said IF analog signal to generate a digital IF signal, said digital signal having a data component and an interference component;
• means for canceling cross-channel interference in said digital signal by projecting said digital signal onto a subspace orthogonal to a subspace of said interference component and multiplying this projection with said digital signal;
• and
• means for acquisition and tracking of said projected digital signal.

A base station, said base station for receiving at least two radio frequency (RF) signals and comprising:

• a receiver for receiving said RF signals;
• means for converting said RF signal to an intermediate frequency (IF) signal;
• means for sampling said IF analog signal to generate a digital IF signal, said digital signal having a data component and an interference component;
• means for canceling cross-channel interference in said digital signal by projecting said digital signal onto a subspace orthogonal to a subspace of said interference component and multiplying this projection with said digital signal;
• and
• means for acquisition and tracking of said projected digital signal.

A method for receiving signals in a receiver having at least one receiver circuit, the method comprising the steps of:

• receiving at least one radio frequency (RF) signal broadcast from at least one mobile receiver;
• converting said RF signal to an intermediate frequency (IF) signal;
• sampling said IF analog signal to generate a digital IF signal, said digital signal having a data component and an interference component;
• and
• means for canceling cross-channel interference in said digital signal by projecting said digital signal onto a subspace orthogonal to a subspace of said interference component and multiplying this projection with said digital signal.

A communication system having a forward link comprising:

• at least one base station which transmits multiple radio frequency (RF) signals;
• and
• at least one mobile station, said mobile station including:
• a receiver for receiving said RF signals;
• means for converting said RF signal to an intermediate frequency (IF) signal;
• means for sampling said IF analog signal to generate a digital IF signal, said digital signal having a data component and an interference component;
• and
• means for canceling co-channel and cross-channel interference in said digital signal by projecting said digital signal onto a subspace orthogonal to a subspace of said interference component and multiplying this projection with said digital signal;
• and
• means for acquisition and tracking of said projected digital signal.