CN1918839A

5G,4G

Title

Spatial spreading in a multi-antenna communication system

Application Number:

CN20048041803

Publication Date:

21-02-2007

Current Assignee:

QUALCOMM INC

Family ID:

34703586

Application Date:

15-12-2004

Declaring Company:

QUALCOMM INC

Publication Country:

US

Priority Date:

17-12-2003

View on Espacenet goto-link

Title

Spatial spreading in a multi-antenna communication system

Application Number:

CN20048041803

Family ID:

34703586

Publication Country:

US

Publication Date:

21-02-2007

Application Date:

15-12-2004

Priority Date:

17-12-2003

Current Assignee:

QUALCOMM INC

Declaring Company:

QUALCOMM INC

View on Espacenet goto-link

Abstract  Abstract

The space band spread system is operated in the multiaerial communication system. The data mark of each transmission receives the randomization of the noumenally observed effective channel. To the MIMO system ND (subscript) that will be projected in the space between NM (subscript) transmissions by transmitting data in the transmitting entity such as encoding interlacing and regulating. ND (subscript) is more than or equal to 1 and NM (subscript) is more than 1. ND (subscript) blocks are divided into NM (subscript) data mark subblocks. The space of each transmission transmits a subblock. It selects matrix for each subblock. For example it selects from the group which has L leading matrix with an assured or a pseudorandom way and L is more than 1. This method processes the space and gets the transmitting marks by selected leading matrix of each data mark subblock. The transmitting marks are further processed and transmitted in the transmitting space by NT (subscript) transmitting antennae. These mark blocks would observe the whole channel by processing ND (subscript) data mark blocks with NM (subscript) leading matrix spaces.

Spatial spreading is performed in a multi-antenna system to randomize an effective channel observed by a receiving entity for each transmitted data symbol block. For a MIMO system at a transmitting entity data is processed (e.g. encoded interleaved and modulated) to obtain ND data symbol blocks to be transmitted in NM transmission spans where ND >= 1 and NM > 1. The ND blocks are partitioned into NM data symbol subblocks one subblock for each transmission span. A steering matrix is selected (e.g. in a deterministic or pseudo-random manner from among a set of L steering matrices where L > 1) for each subblock. Each data symbol subblock is spatially processed with the steering matrix selected for that subblock to obtain transmit symbols which are further processed and transmitted via NT transmit antennas in one transmission span. The ND data symbol blocks are thus spatially processed with NM steering matrices and observe an ensemble of channels.

Spatial spreading is performed in a multi-antenna system to randomize an effective channel observed by a receiving entity for each transmitted data symbol block. For a MIMO system at a transmitting entity data is processed (e.g. encoded interleaved and modulated) to obtain N D data symbol blocks to be transmitted in NM transmission spans where ND? 1 and NM> 1. The ND blocks are partitioned into NM data symbol subblocks one subblock for each transmission span. A steering matrix is selected (e.g. in a deterministic or pseudo-random manner from among a set of L steering matrices where L > 1) for each subblock. Each data symbol subblock is spatially processed with the steering matrix selected for that subblock to obtain transmit symbols which are further processed and transmitted via NT transmit antennas in one transmission span. The ND data symbol blocks are thus spatially processed with NM steering matrices and observe an ensemble of channels.

Note:

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