Methods for managing alignment and latency in interference suppression

摘要

An interference cancelling receiver combines data from multiple paths after aligning to transmitter timing, and uses either an equalizer or a Rake receiver to compute symbol estimates. Interference estimates are generated from the symbol estimates, and multiple interference estimates are combined after re-aligning the interference estimates to receiver timing. At least two segments of symbol estimates are computed for each segment of interference cancelled data.;Various techniques may be employed for controlling the latency and sequencing of these operations, and the subsystems within the canceller may use different processing clock speeds.

主权项

1. An interference cancelling receiver, comprising:
at least one symbol estimator configured to operate on a signal stream to produce one or more symbol estimates from the signal stream; one or more interference estimators coupled to the at least one symbol estimator to produce one or more of interference estimates; one or more storage structures configured to store the one or more interference estimates at one or more locations in the one or more storage structures that are offset from a reference address by a number of addresses representative of a temporal offset between a time reference associated with the reference address and the corresponding interference estimate; and an interference estimate combiner configured to combine one or more interference estimates aligned to the time reference to produce a composite interference estimate.