US 9,001,877 B2Granted

Signal processing for diversity combining radio receiver

AssigneeTelefonaktiebolaget L M Ericsson (publ)

InventorsMats Rydstrom, Dan Weinholt

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Abstract

A signal processing device for a diversity combining radio receiver is disclosed. Said device comprises a plurality of receive branches and a joint detector adapted to determine a joint received symbol based on a combined signal. Said device also comprises a control unit adapted to determine a branch signal error based on the joint received symbol and the input signal of that receive branch. Each receive branch further comprises an adaptive filter. The control unit is adapted to update the coefficients of the adaptive filter of each receive branch based on a weighted signal error combination, wherein weight of the weighted signal error combination is selected based on channel conditions. A corresponding diversity combining radio receiver, a corresponding electronic apparatus, a corresponding method, a corresponding computer program product, and a corresponding computer readable medium are also disclosed.

Claims19

Dependent claims

A signal processing device for a diversity combining radio receiver, wherein the signal processing device comprises:

a plurality of receive branches, wherein each receive branch is adapted to process an input signal originating from a corresponding radio reception path;
a joint detector adapted to determine a joint received symbol based on a combined signal, which is a combination of weighted output signals from the plurality of receive branches, wherein, for each receive branch, the output signal of that receive branch is weighted with a branch weight associated with that receive branch;
and
a control unit adapted to, for each receive branch, determine a branch signal error associated with that receive branch based on the joint received symbol and the input signal of that receive branch, wherein
each receive branch comprises an adaptive filter;
the control unit is adapted to, for each receive branch, update coefficients of the adaptive filter of that receive branch based on the branch signal error of that receive branch;
and
the control unit is adapted to determine a joint signal error of the combined signal and, for each receive branch, update coefficients of the adaptive filter of that receive branch based on a weighted signal error combination of the branch signal error of that receive branch and the joint signal error, wherein a weight of the weighted signal error combination is selected based on channel conditions.

5 more elements

A method of signal processing for a diversity combining radio receiver, comprising:

for each of a plurality of radio reception path, processing an input signal originating from that radio reception paths in a corresponding receive branch of a plurality of receive branches;
determining a joint received symbol based on a combined signal, which is a combination of weighted output signals from the plurality of receive branches, wherein, for each receive branch, the output signal of that receive branch is weighted with a branch weight associated with that receive branch;
for each receive branch, determining a branch signal error associated with that receive branch based on the joint received symbol and an input signal of that receive branch;
for each receive branch, processing the input signal comprises filtering the input signal with an adaptive filter;
for each receive branch, updating coefficients of the adaptive filter of that receive branch based on the branch signal error of that receive branch;
determining a joint signal error of the combined signal;
and
for each receive branch, updating coefficients of the adaptive filter of that receive branch based on a weighted signal error combination of the branch signal error of that receive branch and the joint signal error, wherein a weight of the weighted signal error combination is selected based on channel conditions.

5 more elements

Dependencies are inferred from the claim text.