US 2009/0213910 A1 · Code Power Estimation for MIMO Signals

Abstract

Methods and apparatus for estimating code-reuse interference associated with a received multi-stream multiple-input multiple-output (MIMO) signal are disclosed. In an exemplary method, impairment covariance associated with the received multi-stream MIMO signal is measured, and first and second sets of samples for received traffic data symbols are collected, using first and second sets of RAKE combining weights corresponding to effective net channel responses for first and second streams of the multi-stream MIMO signal, respectively. A per-code energy value for at least one stream of the received multi-stream MIMO signal is computed, as a function of the measured impairment covariance, the effective net channel responses for the first and second streams, and the first and second sets of samples. Finally, code-reuse interference associated with the first stream is calculated, as a function of the per-code energy value and the effective net channel response corresponding to the first stream.

Claims14

Dependent claims

A method of estimating per-code energy for one or more streams of a received multi-stream multiple-input multiple-output (MIMO) signal, the method comprising:

measuring impairment covariance or data covariance associated with the received multi-stream MIMO signal;
collecting first and second sets of samples, each set including a plurality of samples corresponding to received traffic data symbols, using first and second sets of processing weights corresponding to effective net channel responses for first and second streams of the multi-stream MIMO signal, respectively;
computing a first per-code energy value for the first stream of the received multi-stream MIMO signal, as a function of the measured impairment covariance, the effective net channel responses for the first and second streams, and the first and second sets of samples.

A wireless communication receiver, comprising:

a radio front-end circuit configured to receive a multi-stream multiple-input multiple-output (MIMO) signal;
and
one or more processing circuits configured to:
measure impairment covariance or data covariance associated with the received multi-stream MIMO signal;
collect first and second sets of samples for received traffic data symbols, each set including a plurality of samples corresponding to received traffic data symbols, using first and second sets of processing weights corresponding to effective net channel responses for first and second streams of the multi-stream MIMO signal, respectively;
and
compute a first per-code energy value for the first stream of the received multi-stream MIMO signal, as a function of the measured impairment covariance, the effective net channel responses for the first and second streams, and the first and second sets of samples.

4 more elements

Dependencies are inferred from the claim text.

Code Power Estimation for MIMO Signals

Life of this patent

Code Power Estimation for MIMO Signals

Life of this patent

Abstract

Claims14