Time-Division Subcarrier Decoding for Lower-Power Receivers
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Solution Overview
Problem
In multicarrier transmission systems, the increasing number of subcarrier signals leads to higher power consumption in decoding processes due to the need for multiple decoding circuits and increased operating rates of decoding circuits as data values change, resulting in inefficient energy use.
Innovation Solution
A decoding method that involves receiving and processing subcarrier signals in a time-division manner, with error correction performed a predetermined number of times on each data block, allowing for consecutive processing and reducing the operating rate and power consumption by stabilizing data values through iterative decoding algorithms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple decoding circuits are provided equal in number to subcarrier signals, then decoding capability is improved, but power consumption increases
Solution Approach 1:
Multiple decoding circuits are merged into a single common decoding circuit. The patent combines the functionality of multiple subcarrier signal decoding circuits into one shared resource, allowing them to share hardware components and reduce overall power consumption while maintaining the capability to decode multiple subcarrier signals through time-division multiplexing.
Solution Approach 2:
The common decoding circuit performs decoding operations in a periodic, time-division manner. Different subcarrier signals are decoded at different time intervals using the same circuit, which reduces peak power consumption compared to having multiple circuits operating simultaneously, while still achieving the required decoding capability for all subcarriers.
2Device complexity
If a common decoding circuit is used for each subcarrier signal, then device complexity is reduced, but operating rate increases and power consumption increases
Solution Approach 1:
The common decoding circuit operates periodically by allocating different time slots to different subcarrier signals. This time-division approach prevents the circuit from operating at maximum capacity continuously, thereby reducing the effective operating rate and power consumption compared to simultaneous decoding of all subcarriers.
Solution Approach 2:
The decoding circuit dynamically adjusts its operation by switching between different subcarrier signals based on time-division multiplexing. This dynamic time-sliced operation allows the single circuit to handle multiple subcarriers efficiently without requiring continuous high-speed operation, thus reducing power consumption while maintaining versatility.
3Speed
If decoding is performed simultaneously on all subcarrier signals, then processing speed is improved, but power consumption increases
Solution Approach 1:
Instead of simultaneous decoding, the patent implements periodic time-division decoding where different subcarrier signals are decoded in sequential time slots. This approach trades some overall processing time for significantly reduced power consumption, as the decoding circuit operates at lower power levels during idle periods between decoding tasks.
Data Source
AI summary
A decoding method includes: receiving a plurality of subcarrier signals each including encoded data; acquiring a predetermined amount of data from each of the plurality of subcarrier signals; correcting errors in the plurality of subcarrier signals by performing decoding arithmetic processing on the respective predetermined amounts of data acquired from the plurality of subcarrier signals in a time-division manner; and causing the decoding arithmetic processing to be consecutively performed on each of the predetermined amounts of data a predetermined number of times.