Mixed-Modulation Burst Decoding Without Memory Overwrite

Solution Overview

Problem

Existing wireless communication systems face inefficiencies in decoding bursts of coded bits due to varying modulation types, leading to resource consumption and time wastage from overwriting and memory adjustments for bursts with different modulation types.

Innovation Solution

A mixed modulation decoding circuit that selectively accesses valid bursts and avoids rejected bursts, using zero confidence information and maintaining original memory locations, thereby streamlining the decoding process without overwriting or adjusting memory.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the receiving device overwrites bursts with different modulation types and adjusts memory locations to ensure contiguity, then the decoding process can handle mixed modulation types, but system resources and processing time are consumed

Engineering Contradiction:

Improveability to handle mixed modulation typesVSAvoidprocessing time

Core Design Contradiction:

Adaptability or versatilityVSLoss of time

Solution Approach 1:

The system performs preliminary actions by determining the modulation type for each burst before the decoding process. This preliminary classification allows the system to prepare appropriate handling strategies for each burst type in advance, avoiding the need for time-consuming overwriting and memory adjustment operations during the actual decoding process.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system segments the decoding process into separate handling paths for different modulation types. By dividing the processing into distinct segments based on modulation type (GMSK vs. 8PSK), the system can efficiently process each type without requiring uniform handling of all bursts, thereby reducing overall processing time while maintaining versatility.

Inventive Principle:

Principle #1Segmentation

2Ease of manufacture

If the receiving device overwrites bursts with different modulation types and adjusts memory locations, then decoding can proceed with unified memory access, but valuable system resources are consumed

Engineering Contradiction:

Improvedecoding process simplicityVSAvoidsystem resources

Core Design Contradiction:

Ease of manufactureVSQuantity of substance

Solution Approach 1:

The system performs preliminary actions by determining the modulation type for each burst before the decoding process. This preliminary classification allows the system to prepare appropriate handling strategies for each burst type in advance, avoiding the need for time-consuming overwriting and memory adjustment operations during the actual decoding process.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system applies local quality by treating different burst types with different processing strategies. Instead of uniform handling, the system adapts its behavior based on the specific modulation type of each burst, allowing optimized processing for GMSK and 8PSK bursts respectively, thereby reducing overall resource consumption while maintaining decoding simplicity.

Inventive Principle:

Principle #3Local quality

3Reliability

If the receiving device determines modulation type by majority vote and overwrites minority modulation bursts, then the decoding can proceed with a single modulation type assumption, but information from minority modulation bursts is lost

Engineering Contradiction:

Improvedecoding accuracyVSAvoidinformation from minority modulation bursts

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The system segments the decoding process into separate handling paths for different modulation types. By dividing the processing into distinct segments based on modulation type (GMSK vs. 8PSK), the system can efficiently process each type without requiring uniform handling of all bursts, thereby reducing overall processing time while maintaining versatility.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The system changes the parameter of modulation type detection from a binary majority-vote approach to a multi-state classification approach. By detecting and classifying bursts into different modulation types (GMSK, 8PSK, or other) and handling them with appropriate parameters, the system maintains decoding reliability while preserving information from minority modulation bursts that would otherwise be overwritten.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20090024901A1Apparatus and method for decoding bursts of coded information

Publication Date: 2009.01.22 TAIWAN SEMICONDUCTOR MANUFACTURING CO LTD

AI summary

A decoding circuit includes a mixed modulation memory access circuit responsive to burst rejection information. The mixed modulation memory access circuit selectively accesses burst memory locations containing a valid burst of coded bits. The mixed modulation memory access circuit selectively avoids accessing burst memory locations containing a rejected burst of coded bits based on the burst rejection information. In one example, the mixed modulation memory access circuit accesses the valid burst when the burst rejection information indicates that the memory location contains valid bursts. In one example, the mixed modulation memory access circuit generates zero confidence information when the burst rejection information indicates that the memory location contains rejected bursts.