US 8,009,754 B2Granted

Wireless communication method, radio receiving apparatus, radio transmitting apparatus, and wireless communication system

AssigneePanasonic Corporation

InventorsXiaoming She, Jifeng Li

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Abstract

A wireless communication system capable of achieving adaptive STTD (Space-time Transmit Diversity). In this system, a receiving apparatus uses a channel estimation to calculate SINR (Signal to Interference and Noise Ratio) of each of substreams in all the combinations of transmission antennas and also calculate the performance of the whole system in all the combinations of transmission antennas, thereby deciding a particular combination, which provides the best performance of the whole system, and obtaining a parameter for antenna selection. The SINR of each substream in the decided particular combination is used to decide an AMC parameter. A transmitting apparatus performs STTD and AMC based on the AMC parameter fed back from the receiving apparatus, and further selects, based on the antenna selection parameter fed back from the receiving apparatus, a particular combination of transmission antennas for performing a transmission.

Claims14

Dependent claims

A radio communication system comprising a radio transmitting apparatus that transmits a plurality of substreams using a plurality of transmission antennas and a radio receiving apparatus that receives the plurality of substreams using a plurality of reception antennas, wherein:

the radio receiving apparatus comprises:
a channel estimation section that performs channel estimation using the plurality of substreams and generates a channel estimation matrix;
a system performance calculation section that calculates an overall performance of the radio communication system, the overall performance of the radio communication system being calculated in each combination of the plurality of transmission antennas using the channel estimation matrix;
a specific combination determining section that determines a specific combination of the transmission antennas that optimizes the overall performance of the radio communication system;
and
a reporting section that reports information about the specific combination to the radio transmitting apparatus;
and
the radio transmitting apparatus comprises:
an antenna selection section that selects the transmission antennas to use in transmission according to the specific combination reported from the radio receiving apparatus;
and
a transmitting section that transmits another plurality of substreams using the selected transmission antennas.

8 more elements

A radio receiving apparatus comprising:

a receiving section that receives a plurality of substreams transmitted from a radio transmitting apparatus, the plurality of substreams being received using a plurality of reception antennas;
a channel estimation section that performs channel estimation using the plurality of substreams and generates a channel estimation matrix;
a system performance calculation section that calculates an overall performance of a radio communication system, the overall performance of the radio communication system being calculated in each combination of a plurality of transmission antennas of the radio transmitting apparatus using the channel estimation matrix;
a determining section that determines a specific combination of transmission antennas that optimizes the overall performance of the radio communication system;
and
a reporting section that reports information about the specific combination to the radio transmitting apparatus.

3 more elements

A radio communication method in a radio communication system comprising a radio transmitting apparatus that transmits a plurality of substreams using a plurality of transmission antennas and a radio receiving apparatus that receives the plurality of substreams using a plurality of reception antennas, the radio communication method comprising:

at the radio receiving apparatus:
performing channel estimation using the plurality of substreams and generating a channel estimation matrix;
calculating an overall performance of the radio communication system, in each combination of the plurality of transmission antennas, using the channel estimation matrix;
determining a specific combination of the transmission antennas that optimizes the overall performance of the radio communication system;
reporting information about the specific combination to the radio transmitting apparatus;
and
at the radio transmitting apparatus:
selecting the transmission antennas to use in transmission, the transmission antennas being selected according to the specific combination reported from the radio receiving apparatus;
and
transmitting another plurality of substreams using the selected transmission antennas.

7 more elements

Dependencies are inferred from the claim text.

Facts

Application: 11/813,647Filed 12 Jan 2006
Priority: CN 2005 1 000436513 Jan 2005
Published: US 2009/0190684 A130 Jul 2009
Granted: 30 Aug 2011
Term ends: Not estimatedThe source records don’t support an estimate.

Classification9 codes

H04B 7/0619
Of weighted versions of same signal: using feedback from receiving side
H04L 1/0025
Characterised by the signalling: transmission of mode-switching indication
H04L 1/0618
Using space diversity: space-time coding
H04B 7/0691
Hybrid systems, i.e. switching and simultaneous transmission: using subgroups of transmit antennas