US 12,328,175 B2
Method of combining compressed signal
Ho Sik Jang, Seongnam-si (KR); Hoo Pyo Hong, Seongnam-si (KR); Woo Jae Kim, Suwon-si (KR); Dong Hee Kwon, Yongin-si (KR); and Jeong Won Kang, Yongin-si (KR)
Assigned to SOLiD, Inc., Seongnam-si (KR)
Filed by SOLID, Inc., Seongnam-si (KR)
Filed on Apr. 24, 2022, as Appl. No. 17/727,755.
Claims priority of application No. 10-2021-0093666 (KR), filed on Jul. 16, 2021.
Prior Publication US 2023/0023553 A1, Jan. 26, 2023
Int. Cl. H04B 7/08 (2006.01); H03M 7/24 (2006.01); H04B 7/155 (2006.01); H04L 69/04 (2022.01)
CPC H04B 7/0837 (2013.01) [H03M 7/24 (2013.01); H04B 7/155 (2013.01); H04L 69/04 (2013.01)] 6 Claims
OG exemplary drawing
 
1. A method of combining compressed uplink signals by a signal relay device in a fronthaul section, the method comprising:
a signal receiving operation of receiving compressed uplink signals from two or more radio units, wherein the compressed uplink signals are compressed by a block floating point compression method;
an input data processing operation of extracting common parameters in resource block units and sample data from the compressed uplink signals to be combined, wherein the common parameters comprise an exponent of the floating point, and wherein the sample data comprises a mantissa of the floating point;
a pre-processing operation of determining a largest value among the common parameters as a common parameter to be used for a combining result and changing the sample data based on the determined common parameter;
a combining operation of summing the changed sample data without decompression; and
a post-processing operation of checking whether overflow occurs in the combining operation and processing the occurring overflow.