Quantized K-Resource Element Row-Column Interleaver for 5G
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Solution Overview
Problem
Current wireless communication systems, particularly in 5G networks, face challenges in achieving sufficient frequency diversity for code blocks, which limits their ability to span entire bandwidth allocations, leading to performance degradation due to interference and fading.
Innovation Solution
The implementation of a quantized k-resource element row-column interleaver provides additional frequency diversity by interleaving k-resource elements across OFDM symbols, ensuring that elements of the same code block are separated as much as possible, both in frequency and time, thereby reducing fading and improving decoding performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If code blocks are transmitted without interleaving, then transmission simplicity is maintained, but frequency diversity is insufficient leading to performance degradation due to fading and interference
Solution Approach 1:
The patent segments the code block into multiple segments of k-resource elements and distributes them across different OFDM symbols through row-column interleaving. This segmentation enables frequency diversity by separating adjacent resource elements in frequency and time domains, thereby improving decoding performance without requiring complex interleaving schemes
Solution Approach 2:
The patent extends the interleaving operation from a single dimension to two dimensions by arranging k-resource elements in a matrix structure and performing row-column interleaving. This dimensional approach distributes code block elements across both frequency and time domains, achieving frequency diversity while maintaining a structured and manageable interleaving process
2Reliability
If code blocks span entire bandwidth allocation, then frequency diversity is improved, but resource element separation becomes challenging without proper interleaving
Solution Approach 1:
The patent divides the code block into segments of k-resource elements and systematically distributes these segments across the entire bandwidth allocation through row-column interleaving. This segmentation approach ensures that elements of the same code block are separated in frequency and time, achieving frequency diversity while simplifying resource element distribution
Solution Approach 2:
By organizing k-resource elements in a two-dimensional matrix and applying row-column interleaving, the patent enables systematic distribution of code block elements across the entire bandwidth. This dimensional approach makes resource element separation more manageable and ensures frequency diversity is achieved across the full bandwidth allocation
3Reliability
If k-resource elements are interleaved across OFDM symbols, then fading is reduced and decoding performance improves, but processing complexity increases
Solution Approach 1:
The patent segments k-resource elements and interleaves them across OFDM symbols using a systematic row-column approach. This segmentation reduces fading impact by separating adjacent resource elements in time and frequency, while the structured interleaving method keeps processing complexity manageable compared to random interleaving schemes
Solution Approach 2:
The patent employs two-dimensional row-column interleaving to distribute k-resource elements across OFDM symbols. This dimensional approach achieves robustness against fading by separating elements in both frequency and time domains, while maintaining systematic processing that is more efficient than arbitrary interleaving methods
Data Source
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AI summary
Certain aspects of the present disclosure provide a method for wireless communications in a wireless network via a radio access technology. The method generally includes determining dimensions of a matrix to be used for performing interleaving of modulated symbols carrying bits, from a plurality of code blocks, for mapping into bundles of resource elements, in an orthogonal frequency division multiplexed (OFDM) system, based, at least in part, on one of a ratio of a code block size to a number of bits to be mapped into each resource element or the number of bits to be mapped into each resource element, performing the interleaving of the modulated symbols, according to the matrix having the determined dimensions, and transmitting the interleaved modulated symbols in the wireless network via the radio access technology. Other aspects, embodiments, and features are also described and claimed.