Digital Transmitter Scrambling for Low-Power Dummy Data
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Solution Overview
Problem
Existing digital communication systems face challenges in reducing transmit power efficiently when no user data is transmitted, particularly due to difficulties in predicting user data behavior and the resulting communication overhead in entering and leaving power reduction modes, especially when user and dummy data are heavily interleaved.
Innovation Solution
The method involves generating symbols randomly from a predefined symbol alphabet subset Q, scrambling the bit stream through bitwise modulo-2 addition with these symbols, and transmitting the scrambled stream to reduce transmit power levels, ensuring the power level of dummy data is substantially lower than that of user data, without requiring explicit communication between transmitter and receiver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If existing power reduction mode solutions are implemented, then transmit power can be reduced when no user data is transmitted, but communication overhead increases due to required transmitter-receiver agreement and signaling
Solution Approach 1:
The transmitter autonomously determines when to enter power reduction mode based on local detection of user data absence, without requiring receiver acknowledgment or complex signaling. The transmitter self-manages the power reduction decision, eliminating the need for cooperative negotiation protocols.
Solution Approach 2:
The transmitter predicts future user data absence based on current patterns and proactively enters power reduction mode before actual data cessation occurs. This preliminary action avoids the need for real-time negotiation and enables immediate power savings when dummy data transmission begins.
2Loss of energy
If transmitter-receiver agreement protocols are used for power reduction mode, then power can be reduced, but response time increases due to communication delays
Solution Approach 1:
The transmitter independently decides when to enter and exit power reduction mode based on local data pattern analysis, eliminating the time-consuming back-and-forth communication required for mode transitions. The receiver simply processes incoming data without needing to approve power state changes.
Solution Approach 2:
The transmitter predicts data absence patterns and pre-enters power reduction mode, allowing immediate power savings without waiting for confirmation protocols. The system acts on predictions rather than reacting to confirmed state changes through signaling.
Data Source
AI summary
Methods, computer-readable medium, a transmitter, a receiver and a transceiver include the transmitter and the receiver in a digital communication system for reducing the transmit power level when there is no user data is to send, i.e., when dummy data is sent instead. That is achieved by defining a symbol alphabet Q and scrambling a modulated bit stream including user data and dummy data with randomly generated symbols from the symbol alphabet Q.