Wireless Device Waveform Configuration for Dynamic Channel Adaptation

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Solution Overview

Problem

Existing wireless communication systems often employ waveforms designed for worst-case or average channel conditions, leading to inefficiencies in throughput due to over-design or failure in varying conditions, and require device shutdowns for waveform adjustments.

Innovation Solution

A mobile wireless communications device with a controller that determines real-time signal characteristics to configure waveform parameters for each transmission block, allowing for on-the-fly reconfiguration of modulation, bandwidth, and error correction codes based on current channel conditions and data types.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If waveforms are designed for worst-case channel conditions, then reliability is improved, but throughput deteriorates due to over-design

Engineering Contradiction:
Improvewaveform robustnessVSAvoidthroughput
Core Design Contradiction:
ReliabilityVSProductivity

Solution Approach 1:

The patent implements dynamic waveform adaptation by allowing the waveform parameters (such as modulation scheme, coding rate, and symbol duration) to change in real-time based on current channel conditions. The system transitions from static worst-case waveform design to dynamic waveform selection, where the transmitter adjusts waveform characteristics according to measured channel state information, thereby achieving both reliability and high throughput without over-design.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent changes waveform parameters (modulation order, coding rate, symbol duration) based on channel conditions. By adjusting these parameters dynamically, the system can operate at higher throughputs when channel conditions are good while maintaining reliability when conditions deteriorate, resolving the contradiction between fixed robustness and variable throughput requirements.

Inventive Principle:
Principle #35Parameter changes

2Productivity

If waveforms are designed for average channel conditions, then throughput is improved, but reliability deteriorates under worst-case conditions

Engineering Contradiction:
ImprovethroughputVSAvoidtransmission success rate
Core Design Contradiction:
ProductivityVSReliability

Solution Approach 1:

The system dynamically adapts waveform parameters based on real-time channel condition assessment. When channel conditions are good, the system uses waveforms optimized for high throughput; when conditions deteriorate toward worst-case scenarios, the system automatically switches to more robust waveforms, thereby maintaining both high average throughput and reliable operation under adverse conditions.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent incorporates feedback mechanisms where the receiver measures channel conditions and communicates this information back to the transmitter. This feedback enables the transmitter to select appropriate waveform parameters that match current channel conditions, ensuring both throughput optimization and transmission reliability without requiring conservative over-design for all conditions.

Inventive Principle:
Principle #23Feedback

3Manufacturing precision

If waveform reconfiguration requires device shutdown, then waveform adjustment accuracy is improved, but loss of time increases

Engineering Contradiction:
Improvewaveform configuration accuracyVSAvoidcommunication interruption time
Core Design Contradiction:
Manufacturing precisionVSLoss of time

Solution Approach 1:

The patent implements on-the-fly waveform reconfiguration that occurs without device shutdown. The system dynamically adjusts waveform parameters during active communication by processing incoming data blocks with different waveform configurations, eliminating communication interruptions while maintaining accurate waveform adaptation to changing channel conditions.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The patent enables continuous communication during waveform reconfiguration by processing data blocks sequentially with different waveform parameters. Instead of shutting down the device to reconfigure waveforms, the system maintains continuous transmission and reception operations, adjusting waveform characteristics between data blocks without interrupting the overall communication flow, thereby eliminating time loss while preserving configuration accuracy.

Inventive Principle:
Principle #20Continuity of useful action

Data Source

PatentUS8447337B2Wireless communications device with waveform configuration and related methods
Publication Date: 2013.05.21 L3HARRIS GLOBAL COMMUNICATIONS INC
  • US8447337B2 patent drawing
  • US8447337B2 patent drawing
  • US8447337B2 patent drawing

AI summary

A mobile wireless communications device may include an antenna, a transceiver coupled to the antenna, and a controller coupled to the transceiver. The controller may be configured to determine a received signal characteristic, and to configure parameters of a waveform for adjacent forward transmission blocks to be transmitted as sequential forward transmission blocks and based upon the received signal characteristic. Each forward transmission block may have a preamble portion and an associated body portion. The controller may be further configured to set the preamble portion of each forward transmission block to communicate the parameters of the configured waveform.