Channel estimating apparatus, channel estimating method, base station, and communication system

摘要

A channel estimating apparatus includes a receiver that receives reference signal groups that are respectively transmitted from wireless communications units and that each include a reference signal that is allocated a common channel resource allocated to a reference signal in another reference signal group; a first estimating unit that based on a reference signal that is in a first reference signal group among the received reference signal groups and that is allocated a unique channel resource not allocated to a reference signal in another reference signal group, estimates a reference signal that is in the first reference signal group and allocated the common channel resource; and a second estimating unit that based on the reference signal estimated by the first estimating unit, estimates a reference signal that is in a second reference signal group among the received reference signal groups and that is allocated the common channel resource.

主权项

1. A channel estimating apparatus comprising:
a wireless communication interface; and a processor configured for
controlling the wireless communication interface to receive reference signal groups that are respectively transmitted from wireless communications units and that each include a reference signal that is allocated a common channel resource allocated to a reference signal in another reference signal group among the reference signal groups;in accordance with a first reference signal that is in a first reference signal group among the reference signal groups received by the wireless communication interface and that is allocated a unique channel resource not allocated to a second reference signal in another reference signal group, first estimating a third reference signal that is in the first reference signal group and allocated the common channel resource by applying Wiener filtering to the first reference signal group; andin accordance with the third reference signal estimated by the first estimating, second estimating a fourth reference signal that is in a second reference signal group among the received reference signal groups and that is allocated the common channel resource by subtracting the third reference signal from the second reference signal group.