DFT-S-OFDM MULTIPLE LAYER AND SUBBAND TRANSMISSION

Organization Name

Inventor(s)

Robert Mark Harrison of GRAPEVINE TX (US)

DFT-S-OFDM MULTIPLE LAYER AND SUBBAND TRANSMISSION - A simplified explanation of the abstract

This abstract first appeared for US patent application 18040296 titled 'DFT-S-OFDM MULTIPLE LAYER AND SUBBAND TRANSMISSION

Simplified Explanation: The patent application describes a method for a wireless device to transmit multiple layers of an uplink physical channel using different modes of operation and precoding matrices.

The method involves indicating to a network node the device's capability to operate in two modes: one with precoding matrices having at most one non-zero element per column, and the other with precoding matrices having at most two non-zero elements per column.
The device receives a configuration from the network node for a selected mode of operation and transmits the physical channel using transform precoding and the corresponding codebook subset of precoding matrices.

Key Features and Innovation:

Capability to operate in two modes with different precoding matrices.
Use of codebook subset for precoding when transform precoding of a physical channel is disabled.
Flexibility in selecting and transmitting physical channels with different precoding configurations.

Potential Applications:

5G and beyond wireless communication systems.
IoT devices requiring efficient uplink transmission.
Mobile devices with advanced uplink capabilities.

Problems Solved:

Efficient utilization of uplink physical channels.
Adaptation to different network configurations.
Optimization of precoding matrices for uplink transmission.

Benefits:

Improved uplink transmission performance.
Enhanced network capacity.
Better resource utilization in wireless communication systems.

Commercial Applications: Transform Precoding for Uplink Physical Channels in Wireless Communication Systems

Questions about Transform Precoding for Uplink Physical Channels: 1. How does the method described in the patent application improve uplink transmission efficiency? 2. What are the potential implications of using different precoding matrices for uplink channels in wireless communication systems?

Original Abstract Submitted

According to some embodiments, a method performed by a wireless device for transmitting multiple layers of an uplink physical channel comprises transmitting to a network node an indication of a capability to operate according to a first mode of operation and a second mode of operation. In the first mode a codebook subset comprises precoding matrices with at most one non-zero elements per column, and in the second mode the codebook subset comprises precoding matrices with at most two non-zero elements per column. The codebook subset is in a codebook for use when transform precoding of a physical channel is disabled. The method further comprises receiving a configuration from the network node for a selected mode of operation, and transmitting the physical channel using transform precoding and, at least when transmitting with two layers, using the codebook subset comprising the precoding matrices of the selected mode.