Patent Number: 9,385,794

Title: Mobile terminal apparatus, radio base station apparatus and radio communication method

Abstract: To provide a mobile terminal apparatus, radio base station apparatus and radio communication method that enable accurate precoding weights to be generated in coordinated multipoint transmission, a radio communication method of the invention is characterized in that a mobile terminal apparatus (10) performs channel estimation using a downlink reference signal, selects a PMI using the obtained channel estimation value, measures an IQI using at least the channel estimation value and the PMI, and transmits at least the PMI and IQI to a radio base station apparatus, and that the radio base station apparatus generates precoding weights using the PMI and IQI, and performs coordinated multipoint transmission utilizing MIMO transmission using the precoding weights.

Inventors: Benjebbour; Anass (Tokyo, JP), Nagata; Satoshi (Tokyo, JP)

Assignee: NTT DOCOMO, INC.

International Classification: H04B 7/04 (20060101); H04B 7/02 (20060101); H04B 7/06 (20060101); H04L 25/03 (20060101); H04J 11/00 (20060101)

Expiration Date: 2020-07-05 0:00:00