Communication apparatus and base station apparatus

摘要

There is provided a communication apparatus capable of effectively removing interference waves from a received signal while reducing the computation load. The communication apparatus includes a weight calculating unit. The weight calculating unit includes a calculating unit and a selecting unit. The calculating unit calculates a first weight and a second weight. The first weight is obtained, for a target known signal being an update target, by updating, using the target known signal, a weight of a first another known signal updated immediately before performing an update using the target known signal. The second weight is obtained, for a target known signal being an update target, by updating, using the target known signal, a weight of a second another known signal. The selecting unit selects one of the first weight and the second weight that has a lower estimation error.

主权项

1. A communication apparatus comprising a weight calculating unit that calculates weights of a respective plurality of known signals included in a received signal, by a calculation method where a sequential update is performed on a per known signal basis, the weights being adaptive array antenna weights for combining a plurality of received signals received by a plurality of antennas, wherein
the weight calculating unit comprises: a calculating unit that calculates a plurality of weights including at least a first adaptive array antenna weight and a second adaptive array antenna weight of a target known signal being an update target, the first adaptive array antenna weight being obtained by updating, using the target known signal and a first estimation error, an adaptive array antenna weight of a first another known signal updated immediately before performing an update using the target known signal, the second adaptive array antenna weight being obtained by updating, using the target known signal and a second estimation error, an adaptive array antenna weight of a second another known signal different than the first another known signal, the first estimation error being an error of a signal obtained by combining a plurality of received target known signals received by a plurality of antennas using the adaptive array antenna weight of the first another known signal, and the second estimation error being an error of a signal obtained by combining a plurality of received target known signals received by a plurality of antennas using the adaptive array antenna weight of the second another known signal; and a selecting unit that selects one of the plurality of adaptive array antenna weights of the target known signal having a lower estimation error which was used for updating, as an adaptive array antenna weight of the target known signal.