US 8,477,803 B2 · Method and system for implementing a single weight (SW) single channel (SC) MIMO system with no insertion loss

Abstract

In a RF communications system, aspects for implementing a single weight single channel MIMO system with no insertion loss may comprise generating at least one control signal that is utilized to control at least one of a plurality of received signals in a WCDMA and/or HSDPA system. A phase of a first of the plurality of received signals may be adjusted outside of a first processing path used to process that signal so that it is equivalent to a phase of at least a second of the plurality of received signals. A gain in the first processing path may be equivalent to a gain in a second processing path that is utilized to process the second of the plurality of received signals. The control signal may be utilized to adjust a phase and/or an amplitude of at least one of a plurality of received signals.

Claims19

Dependent claims

A method for processing a plurality of received signals in a receiver that each corresponds to a respective RF chain and antenna, comprising:

adjusting, by circuitry, a phase of a local oscillator signal based on at least one control signal to provide an adjusted local oscillator signal;
mixing the adjusted local oscillator signal with a first of the plurality of received signals to provide a first down-converted signal;
mixing the local oscillator signal with a second of the plurality of received signals to provide a second down-converted signal;
combining the first down-converted signal with the second down-converted signal to provide a combined signal;
providing, by a processor, a first output signal based on the combined signal, wherein the first output signal comprises channel estimates and a timing signal that specifies a location of signal clusters;
and
generating by a weight generator, the at least one control signal based on the first output signal and sending the at least one control signal to the circuitry, a first RF chain and a second RF chain.

4 more elements

A wireless communications device for processing a plurality of received signals that each corresponds to a respective RF chain and antenna, comprising:

circuitry configured to adjust a phase of a local oscillator signal based on at least one control signal to provide an adjusted local oscillator signal;
a first mixer configured to mix the adjusted local oscillator signal with a first of the plurality of received signals to provide a first down-converted signal;
a second mixer configured to mix the local oscillator signal with a second of the plurality of received signals to provide a second down-converted signal;
a combining node configured to combine the first down-converted signal with the second down-converted signal to provide a combined signal;
a processor configured to receive the combined signal and provide, based on at least the combined signal, a first output signal that includes channel estimates and a timing signal that specifies a location of signal clusters;
and
a weight generator configured to generate the at least one control signal based on the first output signal and send the at least one control signal to the circuitry, a first RF chain and a second RF chain.

4 more elements

A wireless communications device for processing a plurality of received signals that each corresponds to a respective RF chain and antenna, comprising:

circuitry configured to adjust a phase of a local oscillator signal based on at least one control signal to provide an adjusted local oscillator signal;
a first mixer configured to mix the adjusted local oscillator signal with a first of the plurality of received signals to provide a first down-converted signal;
a second mixer configured to mix the local oscillator signal with a second of the plurality of received signals to provide a second down-converted signal;
a combining node configured to combine the first down-converted signal with the second down-converted signal to provide a combined signal;
a processor configured to receive the combined signal and provide, based on at least the combined signal, a first output signal that includes channel estimates and a timing signal that specifies a location of signal clusters, a second output signal that includes a voice signal, and a third output signal that includes a data signal;
and
a weight generator configured to generate the at least one control signal based on the first output signal.

4 more elements

Dependencies are inferred from the claim text.

Method and system for implementing a single weight (SW) single channel (SC) MIMO system with no insertion loss

Life of this patent

Method and system for implementing a single weight (SW) single channel (SC) MIMO system with no insertion loss

Life of this patent

Abstract

Claims19