US 10,097,288 B2 · Single-stream sliced maximum likelihood aided successive interference cancellation

Abstract

A method includes estimating spatial signatures of the signal and interference data streams, forming a composite channel matrix comprising all or a subset of estimated spatial signatures, performing QR decomposition (QRD) of channel matrix with different spatial orderings, selecting the stream with the largest post-detection signal-to-interference-plus-noise ratio (SINR) based on the elements of the R matrices from different QRD processes, pre-processing received signal using the Q matrix corresponding to the spatial ordering with the largest SINR, demodulating the strongest stream using single-stream sliced maximum likelihood (SSS-ML) method, cancelling the strongest stream and demodulating the remaining weaker streams using low-complexity MMSE method.

Claims20

Dependent claims

A successive interference cancellation method of recovering information from a received wireless signal comprising at least two component streams, comprising:

determining, from the at least two component streams, a stronger stream based on a signal quality criterion;
demodulating the stronger stream using a single-stream sliced maximum likelihood technique by jointly taking into account an effect of the at least two component streams on the received wireless signal;
subtracting, from the received wireless signal, a result of the demodulation of the stronger stream from the received wireless signal, thereby generating an intermediate signal;
and
demodulating, using a minimum mean square error technique, the intermediate signal to recover information modulated on a second one of the at least two component streams.

2 more elements

A wireless signal receiver apparatus comprising:

a memory;
and
a processor that reads code from the memory and executes a method of recovering information from a received wireless signal comprising at least two component streams by successively cancelling interference, the code comprising:
instructions for determining, from the at least two component streams, a stronger stream based on a signal quality criterion;
instructions for demodulating the stronger stream using a single-stream sliced maximum likelihood technique by jointly taking into account effect of the at least two component streams on the received wireless signal;
instructions for subtracting, from the received wireless signal, a result of the demodulation of the stronger stream, thereby generating an intermediate signal;
and
instructions for demodulating, using a minimum mean square error technique, the intermediate signal to recover information modulated on a second one of the at least two component streams.

5 more elements

Dependencies are inferred from the claim text.

Single-stream sliced maximum likelihood aided successive interference cancellation

Life of this patent

Single-stream sliced maximum likelihood aided successive interference cancellation

Life of this patent

Abstract

Claims20