US 12,137,481 B2
PRACH processing for O-RU
Kanchan Kumar Gorain, Somerset, NJ (US); and Raja Sekhar Bachu, Kendall Park, NJ (US)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Jun. 15, 2023, as Appl. No. 18/335,931.
Application 18/335,931 is a continuation of application No. 17/087,499, filed on Nov. 2, 2020, granted, now 11,716,765.
Prior Publication US 2024/0237077 A1, Jul. 11, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. H04W 72/08 (2009.01); H04L 27/26 (2006.01); H04W 72/0446 (2023.01); H04W 72/0453 (2023.01); H04W 74/0833 (2024.01)
CPC H04W 74/0833 (2013.01) [H04L 27/2607 (2013.01); H04L 27/2636 (2013.01); H04W 72/0446 (2013.01); H04W 72/0453 (2013.01)] 30 Claims
OG exemplary drawing
 
1. An apparatus for wireless communication at an open radio access network (O-RAN) radio unit (O-RU), comprising:
at least one memory; and
at least one processor coupled to the at least one memory and, based at least in part on information stored in the at least one memory, the at least one processor, individually or in any combination, is configured to:
receive a physical random access channel (PRACH) preamble and a physical uplink shared channel (PUSCH) within a plurality of symbols of a slot, the PRACH preamble including a PRACH cyclic prefix (CP) in a first symbol of the slot, the PUSCH including a PUSCH CP in each of the symbols of the slot;
filter the PUSCH CP for each symbol of the PRACH preamble through a fast Fourier transform (FFT) window per symbol of the PRACH preamble, the FFT window extending from an end of the PUSCH CP within a symbol to an end of the symbol; and
perform FFT per the FFT window of each symbol of the PRACH preamble.