Signal Acquisition Using Stored DVB-T2 Parameters for DVB-NGH
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Solution Overview
Problem
Mobile devices receiving DVB signals face challenges in quickly acquiring the signal due to intermittent transmissions and frequency hopping, leading to delayed data acquisition and reduced image quality, especially when only one tuner is available and signal parameters need to be re-estimated frequently.
Innovation Solution
The solution involves initializing signal parameter estimation for DVB-NGH frames based on preceding DVB-T2 frames, using stored parameter estimates for interleaved signals, and employing a modified acquisition process that leverages existing DVB-T2 signal parameters to reduce the time required for re-acquiring DVB-NGH signals, thereby improving acquisition speed and reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If signal parameter estimation is performed from scratch for each DVB-NGH frame, then acquisition accuracy is improved, but acquisition time increases and power consumption rises
Solution Approach 1:
The patent applies preliminary action by performing signal parameter estimation on DVB-T2 frames before the actual DVB-NGH signal acquisition. The estimated parameters from DVB-T2 frames are stored and used as initial values for subsequent DVB-NGH frame acquisition, thereby reducing the time required for re-acquisition while maintaining acceptable accuracy levels.
Solution Approach 2:
The patent uses copying by replicating the signal parameter estimation process across different signal types (DVB-T2 and DVB-NGH). The parameters estimated from DVB-T2 frames are copied and adapted for use in DVB-NGH frame acquisition, avoiding redundant estimation work and reducing overall acquisition time.
2Measurement precision
If signal parameter estimation is performed from scratch for each DVB-NGH frame, then measurement precision is improved, but power consumption increases
Solution Approach 1:
The patent performs signal parameter estimation on DVB-T2 frames in advance, storing the results for later use. This preliminary action reduces the need for repeated full estimation processes during DVB-NGH frame acquisition, thereby reducing power consumption while maintaining acceptable measurement precision.
Solution Approach 2:
The patent copies signal parameter estimates from DVB-T2 frames to DVB-NGH frame processing, avoiding redundant computational work and reducing the energy required for signal acquisition operations.
3Device complexity
If a single tuner is used for DVB signal reception, then device cost is reduced, but signal acquisition speed decreases
Solution Approach 1:
The patent performs preliminary signal parameter estimation on DVB-T2 frames before DVB-NGH frame acquisition. This advance preparation enables a single tuner to quickly acquire DVB-NGH signals by using pre-computed parameters, compensating for the lack of multiple tuners and maintaining fast acquisition speed with reduced device complexity.
Data Source
AI summary
A receiver comprises a first signal acquisition unit for acquiring a first type of signal block formatted according to a first format, wherein the first type of signal block is interleaved with a second type of signal block formatted according to a second format. The first signal acquisition unit includes one or more parameter estimation units for estimating, from received signals of the first type, one or more signal parameters related to acquisition of the first type of signal block at a respective frequency; memory to store data relating to the or each estimated parameter for the respective frequency; and a controller configured to initialize parameter estimation for subsequent received signals on a revisited frequency based upon data stored for that respective frequency.