PRBS Channel Coding for Lower PAPR in OFDMA Wireless Links
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Solution Overview
Problem
Current wireless communication systems face challenges in reducing complexity and eliminating redundancy in channel coding processes, particularly in randomization methods, which affect peak to average power ratio (PAPR) and subcarrier interference in OFDMA systems.
Innovation Solution
The implementation of a pseudo-random binary sequence (PRBS) generator for channel coding, which reduces complexity by eliminating multiple randomization processes and applies randomization prior to modulation, thereby reducing PAPR and subcarrier interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If multiple randomization processes are applied in channel coding, then error correction capability is improved, but system complexity increases
Solution Approach 1:
The patent combines multiple randomization processes into a single unified randomization stage performed by a PRBS generator. Instead of applying separate randomization operations at different points in the channel coding chain, the invention implements one comprehensive randomization process that achieves the same error correction benefits while reducing computational complexity and implementation overhead.
Solution Approach 2:
The single randomization process implemented via the PRBS generator serves multiple functions simultaneously: it randomizes the input data sequence, controls PAPR (peak-to-average power ratio), and reduces subcarrier interference. This multi-functional approach eliminates the need for separate dedicated processes for each objective, thereby reducing overall system complexity while maintaining or improving error correction capability.
2Reliability
If randomization is applied after modulation, then error correction is improved, but PAPR and subcarrier interference increase
Solution Approach 1:
The patent applies the randomization process before the modulation stage rather than after it. By performing the PRBS-based randomization on the data sequence prior to modulation, the invention prevents the generation of high PAPR and subcarrier interference that would occur if randomization were applied afterward. This preliminary action maintains error correction benefits while avoiding the harmful side effects.
3Reliability
If complex channel coding processes are used, then communication reliability is improved, but processing time increases
Solution Approach 1:
By merging multiple randomization operations into a single efficient PRBS generator implementation, the patent reduces the total number of processing steps required for channel coding. This consolidation maintains the error correction reliability benefits of multiple randomization stages while significantly reducing the computational time and processing overhead associated with implementing separate randomization processes.
Data Source
AI summary
Embodiments of an apparatus and method for coding of wireless transmissions channel are generally described herein. Other embodiments may be described and claimed.