US 7567622

US Patent 7567622, titled "Constellation rearrangement for ARQ transmit diversity schemes," was filed on December 5, 2006, and issued on July 28, 2009. [cite: The full patent text provides this information for filing date and publication date of the granted patent. For assignee, inventors and title, it's provided in the summary details.] The original assignee was Panasonic Corp, and the current assignee is SWIRLATE IP LLC. The inventors are Christian Wengerter, Alexander Golitschek Edler Von Elbwart, and Eiko Seidel. [cite: The full patent text provides this information for assignee, inventors and title.]

Abstract:
The patent describes an Automatic Repeat reQuest (ARQ) re-transmission method for wireless communication systems. In this method, data packets are sent from a transmitter to a receiver using a first transmission and, if needed, a second transmission based on a repeat request. The key innovation involves modulating the data at the transmitter using a first signal constellation pattern for the first transmission over a first diversity branch, and then using a second, different signal constellation pattern for the second transmission over a second diversity branch. At the receiver, these symbols are demodulated using their respective patterns and then diversity combined. The invention also covers the corresponding transmitter and receiver apparatus. [cite: The full patent text provides this information in the Abstract.]

Plain-Language Overview of Independent Claims:

The patent includes multiple independent claims, distinguishing between scenarios where modulation mappings are pre-stored or signaled, and covering methods, transmitters, receivers, and systems. These claims focus on using different higher-order modulation mappings (where more than two bits form one symbol) for an initial transmission and subsequent re-transmissions over diversity branches, followed by diversity combining at the receiver to improve error performance.

• Claim 1 (Method - Pre-stored Mappings): This claim describes a method where a transmitter sends data packets using a first modulation mapping on a first diversity branch. If the receiver requests a retransmission (due to decoding failure), the transmitter then sends the same data packets using a second, different modulation mapping on a second diversity branch. The receiver demodulates the transmissions using the corresponding first and second mappings and then combines the received data from both diversity branches. The specific mappings used are pre-stored in a memory table at both the transmitter and receiver.

• Claim 3 (Method - Signaled Mappings): Similar to Claim 1, but instead of the mappings being pre-stored, the first and second modulation mappings are communicated or signaled to the receiver by the transmitter.

• Claim 5 (Reception Method - Pre-stored Mappings): This claim focuses on the receiver's part of the ARQ re-transmission process. The receiver demodulates an initial transmission using a first pre-stored mapping. If decoding fails, it sends a repeat request. Upon receiving a retransmission, it demodulates that data using a second pre-stored mapping and then diversity combines the data from both transmissions.

• Claim 7 (Reception Method - Signaled Mappings): Similar to Claim 5, but the receiver uses first and second mappings that were signaled to it by the transmitter, rather than being pre-stored.

• Claim 9 (Transmitter - Pre-stored Mappings): This claim describes a transmitter apparatus. It includes a modulation section that uses a first pre-stored mapping for an initial transmission over a first diversity branch. It also has a receiving section to get repeat requests. In response to a repeat request, the modulation section uses a second pre-stored mapping for a retransmission over a second diversity branch.

• Claim 11 (Transmitter - Signaled Mappings): Similar to Claim 9, but the transmitter's modulation section uses first and second mappings that are signaled to the receiver.

• Claim 13 (Receiver - Pre-stored Mappings): This claim describes a receiver apparatus. It has a demodulation section to demodulate initial transmissions using a first pre-stored mapping, a communication section to send repeat requests, and a combination section. If a retransmission is received, the demodulation section uses a second pre-stored mapping, and the combination section diversity combines the data.

• Claim 15 (Receiver - Signaled Mappings): Similar to Claim 13, but the receiver's demodulation section uses first and second mappings that were signaled to it.

• Claim 17 (System - Pre-stored Mappings): This claim describes an entire wireless communication system comprising both a transmitter (as in Claim 9) and a receiver (as in Claim 13), where the first and second modulation mappings are pre-stored in memory tables at both ends.

• Claim 19 (System - Signaled Mappings): Similar to Claim 17, but the system's transmitter (as in Claim 11) and receiver (as in Claim 15) operate with first and second modulation mappings that are signaled to the receiver.

CAFC 2026 Dockets:
A search of the provided patent text's "Family has litigation" section indicates several US district court cases related to this patent, with one case filed in the Texas Western District Court in 2026 (case 7:26-cv-00154). However, a direct search of current CAFC dockets for 2026 specifically for patent US7567622 did not return any explicit records as of April 26, 2026. The provided patent information lists district court cases but no direct CAFC dockets. Therefore, as of the current date, there is no authoritative information about specific CAFC 2026 dockets directly involving US7567622.