Receiver-Driven Joint Encoder Decoder Mode Adaptation

The patent inverts the traditional transmitter-driven rate adaptation approach by implementing receiver-driven rate adaptation. The receiver terminal now takes the active role in selecting the optimal decoding mode and determining the appropriate transmission rate based on its own channel quality assessment and processing capabilities, while the transmitter adapts its encoding mode according to the receiver's feedback. This inversion enables more accurate rate matching to actual channel conditions and receiver capabilities without significantly increasing overall system complexity.

The patent segments the rate adaptation functionality into distinct modular components: channel quality indication modules at both transmitter and receiver, decoding mode selection logic at the receiver, and feedback mechanisms. By dividing the complex adaptation process into separate functional segments, each handling a specific aspect (channel estimation, mode selection, rate determination, feedback generation), the system achieves sophisticated receiver-driven adaptation while keeping individual component complexities manageable and allowing independent optimization of each segment.

The patent changes the parameters being fed back from the receiver by introducing detailed decoding mode capability information and processed channel quality metrics in addition to or instead of simple CQI values. The receiver provides feedback that includes its supported decoding modes, processing capabilities, and assessed channel conditions, enabling the transmitter to select both the appropriate encoding mode and matching decoding mode. This parameter enrichment provides the transmitter with sufficient information to accurately determine supported rates while keeping feedback overhead manageable through efficient encoding of the capability information.