IP Library › Granted Patent US 12,335,067
Granted Patent B2
US 12,335,067 · App. 17/940,128 · Granted Jun 17, 2025

Method and apparatus for channel prediction for 5G uplink/downlink massive MIMO system for open Radio Access Networks

Inventors: Karthik Muralidhar (Bengaluru, IN); Logeshwaran Vijayan (Bangalore, IN)
Assignee: Mavenir Systems, Inc.
H04L25/0224H04B7/0456H04B7/0639H04L25/025H04B7/0417
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Quick Facts
Patent No.
US 12,335,067
App. No.
17/940,128
Granted
Jun 17, 2025
Kind
B2
Abstract

A method for channel prediction for uplink (UL) and downlink (DL) massive Multiple Input Multiple Output (MIMO) systems for Open Radio Access Network (O-RAN) fronthaul Split 7.2 networks enables prediction of a channel that is seen by the UL slot. The pre-processing matrix is computed by the distributed unit (DU) based on this predicted channel and sent to the radio unit (RU) for minimizing the effects of channel aging. A channel corresponding to sounding reference signal (SRS) symbol closest to uplink slot being decoded can be predicted from previous SRS symbols and can be used as a combining matrix. Alternatively, the channel of the uplink slot itself can be predicted from past SRS symbols, and a combining matrix can be generated based on the predicted channel.

Claims (8)

1. A method of linear channel prediction (LCP) in an Open Radio Access Network (O-RAN) massive Multiple Input Multiple Output (MIMO) system, comprising:

predicting a channel associated with a target uplink (UL) slot to be decoded, wherein said predicting is performed based on at least one previous SRS symbol, and wherein said predicting comprises: i) training for predicting a channel between two periodic SRS symbols; and ii) decoding the target UL slot using a combining matrix based on a predicted channel corresponding to the target UL slot located between slots containing the two periodic SRS symbols;

using the predicted channel as a basis for a combining matrix to be applied in a radio unit (RU) for decoding the target UL slot;

prior to the training for predicting, sampling a channel between two periodic SRS symbols for reconstructing the channel between two periodic SRS symbols, wherein fractional delay infinite impulse response (IIR) filter is used for reconstructing the channel between two periodic SRS symbols.

2. The method according to claim 1 , wherein the sampling the channel is performed at a frequency greater than the Nyquist sampling frequency.

3. The method according to claim 1 , wherein prediction coefficients are obtained by the training.

4. The method according to claim 3 , wherein the prediction coefficients are learned by an adaptive filter configured as one of a normalized least mean square (NLMS) filter, affine projection (AP) filter, and recursive least squares (RLS) filter.

5. The method according to claim 3 , wherein the prediction coefficients are learned by a Kalman filter.

Assignments (16)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Feb 9, 2026
From: MAVENIR US INC.
To: MAVENIR SYSTEMS, INC.
Reel/Frame 073728/0317 →
RELEASE OF SECURITY INTEREST IN COLLATERAL RECORDED AT REEL 069113 AND FRAME 0558 Recorded Jul 31, 2025
From: GLAS USA LLC
To: MAVENIR SYSTEMS, INC.
Reel/Frame 072308/0172 →
RELEASE OF SECURITY INTERESTS (SIDECAR) Recorded Jul 29, 2025
From: JPMORGAN CHASE BANK, N.A.
To: MAVENIR SYSTEMS, INC.
Reel/Frame 072263/0041 →
GRANT OF SECURITY INTEREST - PATENTS Recorded Jul 29, 2025
From: MAVENIR NETWORKS, INC.; MAVENIR SYSTEMS, INC.; ARGYLE DATA, INC.; MAVENIR, INC.; AQUTO CORPORATION; MAVENIR IPA UK LIMITED; MAVENIR SYSTEMS UK LIMITED; MAVENIR LTD.; MAVENIR US INC.
To: GLAS USA LLC
Reel/Frame 072245/0764 →
RELEASE OF SECURITY INTERESTS (SYNDICATED) Recorded Jul 29, 2025
From: JPMORGAN CHASE BANK, N.A.
To: MAVENIR SYSTEMS, INC.
Reel/Frame 072263/0121 →
RELEASE OF SECURITY INTEREST IN COLLATERAL RECORDED AT REEL 067565 AND FRAME 0678 Recorded Jul 29, 2025
From: WILMINGTON SAVINGS FUND SOCIETY, FSB
To: MAVENIR SYSTEMS, INC.
Reel/Frame 072263/0421 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 28, 2025
From: MAVENIR SYSTEMS, INC.
To: MAVENIR US INC.
Reel/Frame 072245/0580 →
SECURITY INTEREST Recorded Jul 28, 2025
From: MAVENIR NETWORKS, INC.; MAVENIR SYSTEMS, INC.; ARGYLE DATA, INC.; MAVENIR, INC.; AQUTO CORPORATION; MAVENIR IPA UK LIMITED; MAVENIR SYSTEMS UK LIMITED; MAVENIR LTD.; MAVENIR US INC.
To: BLUE TORCH FINANCE LLC
Reel/Frame 072268/0439 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Jul 27, 2025
From: MAVENIR SYSTEMS, INC.
To: MAVENIR US, INC.
Reel/Frame 072245/0419 →
INTELLECTUAL PROPERTY SECURITY AGREEMENT Recorded Oct 4, 2024
From: MAVENIR SYSTEMS, INC.
To: GLAS USA LLC
Reel/Frame 069113/0558 →
RELEASE OF SECURITY INTEREST Recorded Oct 4, 2024
From: WILMINGTON SAVINGS FUND SOCIETY, FSB
To: MAVENIR SYSTEMS, INC.
Reel/Frame 069113/0596 →
SECURITY INTEREST Recorded Aug 30, 2024
From: MAVENIR SYSTEMS, INC.
To: WILMINGTON SAVINGS FUND SOCIETY, FSB
Reel/Frame 068822/0966 →
INTELLECTUAL PROPERTY SECURITY AGREEMENT SUPPLEMENT Recorded Jul 18, 2024
From: MAVENIR SYSTEMS, INC.
To: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 068425/0209 →
INTELLECTUAL PROPERTY SECURITY AGREEMENT SUPPLEMENT Recorded Jul 18, 2024
From: MAVENIR SYSTEMS, INC.
To: JPMORGAN CHASE BANK, N.A., AS COLLATERAL AGENT
Reel/Frame 068425/0126 →
SECURITY INTEREST Recorded May 29, 2024
From: MAVENIR SYSTEMS, INC.
To: WILMINGTON SAVINGS FUND SOCIETY, FSB
Reel/Frame 067565/0678 →
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Oct 17, 2022
From: MURALIDHAR, KARTHIK; VIJAYAN, LOGESHWARAN
To: MAVENIR SYSTEMS, INC.
Reel/Frame 061443/0209 →
Priority Claims (1)
IN 202121041904 · Sep 16, 2021 · national
Continuity (1)
Related Publication 20230078276A1 · Mar 16, 2023
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