US 12,126,411 B2
4Tx codebook enhancement in LTE
Eko Onggosanusi, Coppell, TX (US); Runhua Chen, Plano, TX (US); and Ralf Bendlin, Cedar Park, TX (US)
Assigned to TEXAS INSTRUMENTS INCORPORATED, Dallas, TX (US)
Filed by Texas Instruments Incorporated, Dallas, TX (US)
Filed on Jan. 23, 2023, as Appl. No. 18/100,466.
Application 18/100,466 is a continuation of application No. 17/403,587, filed on Aug. 16, 2021, granted, now 11,563,470.
Application 17/403,587 is a continuation of application No. 16/989,587, filed on Aug. 10, 2020, granted, now 11,095,346, issued on Aug. 17, 2021.
Application 16/989,587 is a continuation of application No. 16/518,597, filed on Jul. 22, 2019, granted, now 10,742,280, issued on Aug. 11, 2020.
Application 16/518,597 is a continuation of application No. 15/698,015, filed on Sep. 7, 2017, granted, now 10,361,760, issued on Jul. 23, 2019.
Application 15/698,015 is a continuation of application No. 15/132,024, filed on Apr. 18, 2016, granted, now 9,780,850, issued on Oct. 3, 2017.
Application 15/132,024 is a continuation of application No. 14/863,156, filed on Sep. 23, 2015, granted, now 9,319,121, issued on Apr. 19, 2016.
Application 14/863,156 is a continuation of application No. 14/177,547, filed on Feb. 11, 2014, granted, now 9,281,881, issued on Mar. 8, 2016.
Claims priority of provisional application 61/817,657, filed on Apr. 30, 2013.
Claims priority of provisional application 61/812,459, filed on Apr. 16, 2013.
Claims priority of provisional application 61/807,647, filed on Apr. 2, 2013.
Claims priority of provisional application 61/777,664, filed on Mar. 12, 2013.
Claims priority of provisional application 61/770,705, filed on Feb. 28, 2013.
Claims priority of provisional application 61/769,463, filed on Feb. 26, 2013.
Claims priority of provisional application 61/768,851, filed on Feb. 25, 2013.
Claims priority of provisional application 61/763,804, filed on Feb. 12, 2013.
Prior Publication US 2023/0163818 A1, May 25, 2023
This patent is subject to a terminal disclaimer.
Int. Cl. H04B 7/04 (2017.01); H04B 7/0417 (2017.01); H04B 7/0456 (2017.01); H04B 7/06 (2006.01)
CPC H04B 7/0456 (2013.01) [H04B 7/0417 (2013.01); H04B 7/046 (2013.01); H04B 7/0469 (2013.01); H04B 7/0478 (2013.01); H04B 7/0486 (2013.01); H04B 7/0626 (2013.01); H04B 7/0639 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A method, comprising:
receiving one or more precoding matrix indicator (PMI) signals from a remote transceiver; and
generating a precoding matrix W equal to a matrix multiplication of two matrices W1 and W2, where said precoding matrix W is applicable to precoding one or more layers of data streams, matrix W1 selected from a first codebook C1 based on a first group of bits in the PMI signals, and matrix W2 selected from a second codebook C2 based on a second group of bits in the PMI signals, wherein the first codebook C1 comprises the following W1 matrices:

OG Complex Work Unit Math
Nt≥4 is the number of transmit antennas corresponding to W,
N is an integer number greater than or equal to Nr.