Block Decoding with Preset Patterns for Low-Signal PCH Reception
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Solution Overview
Problem
In radio communication systems, Mobile Stations (MS) may fail to receive control channel signals properly due to sub-threshold reception performance during sleep mode, leading to potential missed calls and performance degradation in the overall system, particularly for Paging Channel (PCH) signals.
Innovation Solution
A signal reception apparatus and method that enhance block decoding performance by incorporating an additional decoding operation using a known pattern between the signal transmission and reception apparatus, specifically through a block decoding unit that includes a de-multiplexer, block decoder, and error correction controller, which performs error correction and additional decoding until a preset criterion is met, even in low reception conditions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the MS transits into sleep mode to minimize power consumption, then power consumption is reduced, but reception performance deteriorates below threshold levels
Solution Approach 1:
The patent applies preliminary action by performing error correction decoding using a preset pattern (such as a padding block pattern) before final signal reception. The block decoding unit pre-processes the received signal by attempting decoding with the expected pattern, and only if this preliminary decoding fails does the system proceed to alternative reception methods. This allows the MS to maintain sleep mode with minimal power consumption while still ensuring reliable signal reception when needed.
2Device complexity
If the MS uses conventional decoding methods for PCH signals, then decoding process is simple, but error detection and correction performance is insufficient
Solution Approach 1:
The patent segments the decoding process into multiple stages: first, a block decoding unit performs initial decoding using a preset pattern (such as 0x2B padding block); second, if this fails, a Viterbi decoder performs convolutional decoding; third, if that fails, a Fire decoder performs block decoding with different assumptions. This segmentation allows the system to achieve high error detection and correction performance by trying multiple decoding strategies, while maintaining relatively simple individual decoding steps that can be implemented efficiently.
Data Source
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AI summary
A method for decoding a channel signal in a signal reception apparatus is provided. The method includes performing a block decoding operation on a channel signal block (311), and if the block decoding for the channel signal block fails, reperforming a block decoding operation on the channel signal block using a preset pattern (319, 321).