ES2639770T3

5G,4G

Title

Not Available

Application Number:

ES20110715085T

Publication Date:

30-10-2017

Current Assignee:

ERICSSON INC

Family ID:

43926001

Application Date:

06-04-2011

Declaring Company:

ERICSSON INC

Publication Country:

US

Priority Date:

07-04-2010

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Title

Not Available

Application Number:

ES20110715085T

Family ID:

43926001

Publication Country:

US

Publication Date:

30-10-2017

Application Date:

06-04-2011

Priority Date:

07-04-2010

Current Assignee:

ERICSSON INC

Declaring Company:

ERICSSON INC

View on Espacenet goto-link

Abstract  Abstract

A method (700) in a wireless communication transceiver (12), wherein another transceiver (10) precodes the transmissions (60) to the transceiver (12) based at least in part on the transceiver (12) that sends status information of channel (62) to the other transceiver (10) that includes precoder information (64) comprising a precoder recommendation from the transceiver (12) to the transceiver (10) and wherein the method is characterized by: selecting (702) inputs from one or more code books (30) as a selected conversion precoder (32) and a selected tuning precoder (34), or as a selected global precoder (36) that is the product of a selected conversion precoder (32) and a tuning precoder (34) selected; and transmitting (704) indications of the selected inputs such as said precoder information (64) included in the channel status information (62); and where there are 2NT conversion precoders (32), each comprising a diagonal matrix of blocks having two or more columns with blocks on the diagonal of the matrix, each block such that it comprises a pregroup of antenna subgroups (38) DFT-based that corresponds to a subgroup of NT / 2 of the NT transmission antenna ports (98) on the transceiver (10) and provides 2NT different DFT-based beams for the corresponding subgroup, and where all 2NT different precoders of Conversion (32) are reusable, together with one or more of the tuning precoders (34), to form a set of 2NT different global precoders (36), where each global precoder (36) represents a beam based on DFT size NT over the NT transmission antenna ports (98), wherein said one or more code books (30) includes conversion and tuning precoders (32, 34) or global precoders (36) corresponding For multiple transmission ranges, and where for a transmission range r> 2: the tuning precoder (34) has 2 (r / 2) rows and r columns, where r is the transmission range, where all the elements nonzero are of constant modulus, each column has exactly two nonzero elements, and each row has exactly two nonzero elements, and two columns that have nonzero elements in the same two rows are orthogonal to each other, and the Conversion precoder (32) has 2 (r / 2) columns, and if row m in a tuning precoder column in said tuning precoder (34) has a nonzero element, so does the m + ( r / 2).

Note:

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The information in grey was provided by the patent holder

The information in purple was extracted from the FrandAvenue

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Implicitly disclosed patent:does not explicitly state certain aspects of the invention, but still allows for these to be inferred from the information provided.

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