Granted Patent B2

US 7,299,027 · App. 10/536,010 · Granted Nov 20, 2007

Abstract

Claims (22)

1. A Multi-Input/Multi-Output (MIMO) receiver comprising:

a plurality of receiving antennas that receive a plurality of radio signals;

an estimation section that finds channel estimation values of the plurality of radio signals;

a MIMO separation section that, using a MIMO scheme, separates the plurality of radio signals in accordance with the channel estimation values;

a compensation section that compensates for channel variations of the plurality of radio signals; and

a selection section that selects one of said MIMO separation section and said compensation section.

2. The MIMO receiver according to claim 1 , wherein said selection section selects said compensation section when the plurality of radio signals are transmitted from a single transmitting antenna.

3. The MIMO receiver according to claim 1 , wherein said selection section selects said compensation section when the plurality of radio signals are identical signals transmitted from a plurality of transmitting antennas and space multiplexed.

4. The MIMO receiver according to claim 1 , wherein said selection section selects one of said MIMO separation section and said compensation section in accordance with a difference or a ratio of a channel estimation value for a desired signal and a channel estimation value for an interference signal included in the plurality of radio signals.

5. The MIMO receiver according to claim 4 , further comprising:

a comparing section that compares the difference or the ratio with a predetermined threshold; and

a setting section that sets said threshold in accordance with a modulation level, a coding rate, a spreading factor or a code multiplex number of each of the plurality of radio signals, wherein

said selection section selects one of said MIMO separation section and said compensation section in accordance with a comparing result of said comparing section.

6. The MIMO receiver according to claim 1 , wherein the plurality of radio signals are converted into a multi-carrier signal.

7. A communication terminal apparatus comprising said MIMO receiver according to claim 1 .

8. A base station apparatus comprising said MIMO receiver according to claim 1 .

9. A Multi-Input/Multi-Output (MIMO) reception method comprising:

a reception step of receiving a plurality of radio signals at a plurality of receiving antennas;

an estimation step of finding channel estimation values of the plurality of radio signals;

a MIMO separation step of separating, using a MIMO scheme, the plurality of radio signals in accordance with the channel estimation values;

a compensation step of compensating for channel variations of the plurality of radio signals; and

a selection step of selecting one of said MIMO separation step and said compensation step.

Assignments (11)