Interference and noise estimation in a multiple input multiple output (MIMO) receiver

摘要

A receiver circuit receives a signal including a first reference signal from a first antenna port that is allocated to the UE. The receiver circuit includes a descrambling and despreading unit that despreads and descrambles the signal using a spreading code of the first antenna port and a scrambling sequence assigned to the UE to generate a first antenna port signal. The descrambling and despreading unit despreads and descrambles the signal using a spreading code of a second antenna port and the scrambling sequence assigned to the UE, wherein the second antenna port is unallocated to the UE to generate a second antenna port signal. A channel estimator generates a channel estimate of the first antenna port based on the first antenna port signal. An estimation unit estimates an interference and noise covariance measure based on the first antenna port signal, the channel estimate and the second antenna port signal.

主权项

1. A method of estimating interference and noise in a multiple input multiple output (MIMO) receiver of a user equipment (UE), comprising:
receiving a signal at the UE comprising a first reference signal transmitted from a first antenna port, the first antenna port being allocated to the UE; despreading and descrambling the signal using a spreading code associated with the first antenna port and a scrambling sequence assigned to the UE, thereby generating a first antenna port signal; despreading and descrambling the signal using a spreading code associated with a second antenna port and the scrambling sequence assigned to the UE, the second antenna port being unallocated to the UE, thereby generating a second antenna port signal; performing channel estimation using a channel estimator of the first antenna port based on the first antenna port signal, thereby generating a channel estimate relating to the first antenna port; and estimating an interference and noise covariance measure based on the first antenna port signal, the channel estimate and the second antenna port signal.