TECHNOLOGIES FOR PRECODING MATRIX WITH PHASE CALIBRATION ERROR COMPENSATION

Smart overview of the Invention

Devices and systems are being developed to address phase calibration errors in physical uplink shared channel (PUSCH) transmissions. These efforts focus on enhancing the performance of wireless communication systems, specifically within New Radio (NR) networks that utilize multiple-input, multiple-output (MIMO) technologies. The goal is to improve signal accuracy and reliability in data transmission by compensating for these errors.

Background

NR networks currently support two MIMO operation modes for uplink communication. The first mode uses a codebook-based approach where the precoding and number of layers are determined by a transmit precoding matrix indicator (TPMI) value. This is defined in the 3GPP Technical Specification 38.211. The second mode is non-codebook-based, relying on a sounding reference signal resource indicator (SRI) for precoding decisions. These modes are designed to facilitate efficient data transmission using a maximum of four transmit antenna ports and four-layer PUSCH.

Technical Challenges

The evolution of MIMO technology in NR networks is leading to the exploration of eight transmit antennas for uplink operations. This configuration aims to enhance user equipment (UE) capabilities, including devices like customer premise equipment, fixed wireless access devices, and industrial systems. However, implementing an eight-Tx-antenna configuration presents challenges, particularly in designing TPMI for coherent codebook PUSCH operations. Current TPMI designs support only up to four antenna ports, necessitating new approaches for higher antenna configurations.

Glossary of Terms

Several technical terms are essential to understanding the described technologies:

• Circuitry: Refers to hardware components like processors and memory configured to provide specific functionalities.
• Processor Circuitry: Capable of executing sequences of operations, including CPUs and GPUs.
• Interface Circuitry: Enables information exchange between components or devices.
• User Equipment (UE): Devices with radio communication capabilities, such as mobile devices and client terminals.
• Channel: Any medium used for data communication, including links and data streams.

Conclusion

Advancements in NR networks are driving the need for more sophisticated MIMO configurations, particularly the transition to eight-Tx-antenna setups for uplink operations. Addressing phase calibration errors in PUSCH transmissions is crucial for achieving reliable and efficient communication. As efforts continue within the 3GPP framework, these innovations aim to enhance the performance and capabilities of wireless communication systems, paving the way for more robust and versatile network infrastructures.