Successive interference cancellation (SIC) ordering algorithms for improved multiple-input multiple-output (MIMO) performance

摘要

Certain aspects of the present disclosure provide ordering techniques for a Successive Interference Cancellation (SIC) receiver which may be used to robustly choose a correct stream for first decode under varying data rates, SNR and mobile propagation conditions in Multiple Input Multiple Output (MIMO) systems. The SIC ordering techniques discussed in the disclosure include SNR and/or Rate based information theoretic approach. For example, the SIC receiver may evaluate an SNR based or RATE-based information theoretic metric for the MIMO streams and choose one stream with a higher value of the metric for decoding first. A speculative single code block based approach is may also be used for selecting a stream for first decode, by leveraging the presence of per code block Cyclic Redundancy Check (CRC) and the lack of time diversity in LTE systems.

主权项

1. A method for wireless communication by a receiver, comprising:
receiving at least two streams of data; selecting at least one of the received streams to decode first, from a comparison of a metric corresponding to at least two of the streams, the metric based on a gap between a measured value of a parameter and an allocated value of the parameter, wherein the parameter comprises a data rate; and performing interference cancelation using results of decoding the selected at least one stream to decode at least one non-selected stream.