Radio Receiver Synchronization Using Pre-computed Lookup Tables
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Solution Overview
Problem
The synchronization of radio receivers in pulse radio transmission systems is time-consuming and requires significant computational resources, leading to data loss and high energy consumption, especially for low-rate transmissions, and is incompatible with energy detection methods.
Innovation Solution
A method that dynamically adapts calculations based on received pulses, using a code stored in the receiver to estimate pulse reception moments, validating associations, and deducing the symbol transmission start, reducing the average calculation time and simplifying receiver design, while being compatible with energy detection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If traditional synchronization methods are used, then synchronization accuracy can be achieved, but synchronization time becomes excessively long and data is lost
Solution Approach 1:
The patent applies preliminary action by pre-calculating and storing correlation values for different time offsets in a lookup table before synchronization is needed. During actual synchronization, the receiver only needs to query the pre-computed table rather than performing full correlation calculations, dramatically reducing the time required while maintaining synchronization accuracy.
Solution Approach 2:
The patent uses preliminary action by pre-processing the synchronization signal to extract characteristic features and storing them in advance. This allows the receiver to quickly compare received signals against pre-analyzed templates, achieving fast and accurate synchronization without time-consuming real-time computations.
2Reliability
If traditional synchronization methods are used, then synchronization can be achieved, but computational resources and energy consumption increase significantly
Solution Approach 1:
The patent replaces complex mechanical computation systems with a simplified lookup table approach. Instead of performing intensive real-time correlation calculations requiring significant computational power, the system substitutes pre-computed correlation values stored in memory, dramatically reducing energy consumption while maintaining synchronization reliability.
Solution Approach 2:
The patent uses inexpensive lookup tables stored in memory rather than requiring complex, energy-intensive processing hardware. This substitution of computational resources with simple data storage structures reduces both the complexity and energy requirements of the synchronization system.
3Measurement precision
If traditional synchronization methods are used, then synchronization accuracy is maintained, but device complexity increases
Solution Approach 1:
The patent extracts the computationally intensive correlation calculation step from the real-time synchronization process and separates it into a pre-processing phase. By taking out the heavy computation and storing results in lookup tables, the receiver complexity during operation is significantly reduced while synchronization precision is preserved through accurate table lookups.
Data Source
AI summary
A method for the synchronization of a radio receiver, comprising an estimation of the moment when a pulse (11, 17) is received (11, 17), performed from the moment when a previous pulse was received. The estimated moment is compared with the real moment when the pulse (21, 27) is received in order to validate an association of pulses with values of a code recorded in the receiver (31, 37). A moment for the beginning of transmission of a symbol is thus deduced, enabling the receiver to be synchronized in relation to the transmitted radio pulse sequence.