Efficient tree-based MIMO OFDM detection

摘要

Systems and methods are provided for efficient tree-based detection of multi-carrier modulated signals, such as Orthogonal Frequency Division Multiplexing (OFDM) symbols. In an embodiment, a plurality of signals occupying respective tones are received and processed to determine an order, based on a tone quality metric, for the plurality of signals. The plurality of signals are then dispatched to a pool of tree detectors in accordance with the order. In an embodiment, the order ensures that signals occupying higher quality tones, and requiring shorter detection times, are dispatched first to the pool of tree detectors. In another embodiment, a maximum runtime of busy tree detectors of the pool is updated based signal on actual detection times to exploit the time slack of early terminating detectors.

主权项

1. A receiver, comprising:
a scheduler configured to receive a plurality of signals occupying respective tones corresponding to a communication channel and to determine an order, based on a tone quality metric, for the plurality of signals, the scheduler including:
a detection time estimator configured to generate respective detection time estimates for the plurality of signals; anda scheduling engine configured to determine the order based on the respective detection time estimates of the plurality of signals, wherein the order sorts the plurality of signals in an ascending order of the respective detection time estimates; and a detector configured to receive the plurality of signals from the scheduler in accordance with the order and to process the plurality of signals to generate a plurality of output signals.