ATSC 3.0 Receiver Signal Processing for Fast Channel Scanning
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The existing ATSC 3.0 receiver devices require a time-consuming full scan of all channels to determine if a specific signal is transmitted, which slows down the channel scanning operation.
Innovation Solution
A receiver device with a signal processing method that performs multiple correlation calculations and carrier frequency offset estimations and compensations to quickly identify if a signal conforms to the ATSC 3.0 standard, allowing for early determination of signal presence and reducing scanning time.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a full scan of all channels is performed to determine signal presence, then measurement completeness is improved, but scanning time increases
Solution Approach 1:
The patent segments the signal detection process into multiple stages: initial correlation calculation, carrier frequency offset estimation, phase verification, and decoding verification. This staged approach allows early termination when signals are detected, avoiding complete scanning of all channels while maintaining detection accuracy.
Solution Approach 2:
The patent performs preliminary correlation calculation and carrier frequency offset estimation before complete signal verification. These preliminary actions enable early identification of potential signals, allowing the system to prioritize further verification only for promising channels rather than processing all channels equally.
2Measurement precision
If multiple verification steps are performed to confirm signal conformity, then measurement precision is improved, but processing time increases
Solution Approach 1:
The patent implements dynamic verification where the depth of verification steps is adjusted based on initial correlation results. Channels with high correlation values undergo complete verification (phase check, decoding check), while channels with low correlation values are terminated early, dynamically balancing verification accuracy with processing speed.
Solution Approach 2:
The patent uses feedback from each verification stage to determine whether to proceed to the next stage. The correlation calculation result feeds into the decision to perform carrier frequency offset estimation, which feeds into phase verification, and so on. This feedback mechanism ensures thorough verification only when necessary, maintaining accuracy while improving overall detection speed.
Data Source
AI summary
A signal processing method for processing a signal received by a receiver device includes: performing a first correlation calculation on the received signal to obtain a first calculation result; performing carrier frequency offset estimation and compensation on the received signal to obtain a first compensated signal; performing a second correlation calculation on the first compensated signal to obtain a second calculation result; performing carrier frequency offset compensation on the first compensated signal to obtain a second compensated signal; determining whether at least one phase of the second compensated signal is correct; and determining whether at least one decoding result of the second compensated signal is correct. The received signal is determined not a signal conforming to a predetermined standard when the at least one phase of the second compensated signal or the at least one decoding result of the second compensated signal is determined incorrect.