WLAN Transmitter Frequency Subblocks for Broadband Decoding Reliability
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Solution Overview
Problem
Existing wireless communication systems face challenges in supporting broadband transmission in wireless local area networks (WLANs) due to increased complexity and burden when enlarging the size of the interleaver, which affects decoding performance.
Innovation Solution
A method and transmitter that determine the number of bits assigned to a single axis of a signal constellation and use multiple encoders to generate coded blocks, which are then parsed into frequency subblocks for transmission, allowing for efficient broadband support without increasing the size of the interleaver.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the size of the interleaver is increased to support broadband transmission, then frequency diversity gain and coding gain are improved, but device complexity and structural burden increase
Solution Approach 1:
The coded block is divided into multiple frequency subblocks, each of which is independently interleaved. This segmentation allows the system to achieve frequency diversity gain across the broadband without requiring a single large interleaver, thereby reducing device complexity while maintaining reliability.
Solution Approach 2:
Instead of increasing interleaver size in one dimension (block size), the patent introduces a new dimension by creating multiple frequency subblocks that can be independently processed. This dimensional approach allows broadband support through frequency domain segmentation rather than temporal domain expansion.
2Reliability
If the size of the interleaver is increased to maximize interleaving effect, then coding gain is improved, but ease of operation and existing structure compatibility deteriorate
Solution Approach 1:
The patent segments the coded block into multiple frequency subblocks, allowing each subblock to be independently interleaved with existing interleaver structures. This maintains compatibility with existing structures while achieving coding gain through multiple independent interleaving operations rather than a single large-scale operation.
Solution Approach 2:
Instead of applying one large interleaving operation, the patent applies multiple partial interleaving operations on smaller frequency subblocks. This partial action approach achieves the necessary coding gain while avoiding the need to change existing large-scale interleaver structures.
3Productivity
If multiple encoders are used to generate coded blocks for broadband, then productivity is improved, but device complexity increases
Solution Approach 1:
The patent divides the data processing into multiple parallel encoding paths, each handling a portion of the data. This segmentation enables simultaneous processing across multiple encoders, improving productivity while keeping each individual encoder relatively simple in structure.
Solution Approach 2:
Multiple encoder outputs are merged into a single coded block that is then parsed into frequency subblocks. This merging approach allows the system to leverage multiple encoders for increased productivity while maintaining a unified output structure that can be processed through the rest of the transmission chain.
Data Source
AI summary
Provided are a transmitter and a method for transmitting a data block in a wireless communication system. The method comprises the following steps: deciding the number of bits (s) and encoders (NES) to allocate to one axis of a signal constellation; encoding an information bit based on the s and the NES and generating a coded block; parsing the coded block based on the s and the NES and generating a plurality of frequency sub-blocks; and transmitting the plurality of frequency sub-blocks to a receiver.