Apple Patent: Multiple DMRS Ports in Code Division Multiplexing
Summary
The USPTO has granted Apple Inc. a patent (US12587323B2) for a technology supporting multiple demodulation reference signal (DMRS) ports per code division multiplexing (CDM) group. The patent, filed on August 4, 2023, details methods and apparatus for enhancing wireless communication efficiency.
What changed
The United States Patent and Trademark Office (USPTO) has issued patent US12587323B2 to Apple Inc. This patent covers novel methods and apparatus for supporting multiple demodulation reference signal (DMRS) ports within a code division multiplexing (CDM) group. The technology utilizes frequency domain orthogonal cover codes (FD-OCC) to enable a significantly higher number of DMRS ports, enhancing the efficiency and performance of wireless communication systems.
This patent grant is primarily an intellectual property development and does not impose immediate compliance obligations on regulated entities. However, companies involved in wireless telecommunications, particularly those developing or manufacturing devices that utilize code division multiplexing, should be aware of this granted patent. It may influence future technology development, licensing agreements, and patent litigation within the sector.
Archived snapshot
Mar 27, 2026GovPing captured this document from the original source. If the source has since changed or been removed, this is the text as it existed at that time.
Multiple demodulation reference signal (DMRS) ports in a code division multiplexing (CDM) group
Grant US12587323B2 Kind: B2 Mar 24, 2026
Assignee
Apple Inc.
Inventors
Haitong Sun, Ankit Bhamri, Chunxuan Ye, Dawei Zhang, Hong He, Huaning Niu, Seyed Ali Akbar Fakoorian, Wei Zeng
Abstract
The present application relates to devices and components including apparatus, systems, and methods that support multiple demodulation reference signal (DMRS) ports per code division multiplexing (CDM) group. In an example, a frequency domain orthogonal cover code (FD-OCC) of length three or six is used, thereby allowing at least six DMRS ports for DMRS configuration type 1 with a single symbol DMRS, at least twelve DMRS ports for DMRS configuration type 1 with a double symbol DMRS, at least nine DMRS ports for DMRS configuration type 2 with a single symbol DMRS, and at least eighteen DMRS ports for DMRS configuration type 2 with a double symbol DMRS.
CPC Classifications
H04L 5/0016 H04L 5/0053
Filing Date
2023-08-04
Application No.
18365928
Claims
20
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