Decoding of polar-coded OFDM systems over multipath fading channels with interleaving and channel state information

Area of Science:

• Wireless Communication
• Information Theory
• Signal Processing

Background:

• Orthogonal Frequency Division Multiplexing (OFDM) systems are susceptible to multipath fading, causing frequency-selective fading and burst errors.
• Polar codes offer strong error correction but their performance degrades under frequency-selective fading in OFDM systems.
• Existing decoding strategies struggle to mitigate the combined effects of varying subcarrier noise and burst errors.

Purpose of the Study:

• To improve the decoding performance of polar-coded OFDM systems operating in multipath fading channels.
• To develop novel decoding strategies that address subcarrier noise variations and burst error sensitivity.
• To enhance the overall transmission reliability and error correction capabilities of future wireless communication systems.

Main Methods:

• Integrating subcarrier channel state information (CSI) into the polar decoder's soft information generation.
• Implementing a packet interleaving scheme post-polar encoder to combat burst errors.
• Conducting simulations to evaluate the proposed decoding strategies against conventional methods.

Main Results:

• The proposed integrated approach significantly outperforms conventional schemes in multipath fading channels.
• Channel state information integration effectively mitigates performance degradation due to subcarrier SNR variations.
• Packet interleaving demonstrates enhanced robustness against burst errors induced by frequency-selective fading.

Conclusions:

• The combined decoding strategies are essential for robust error correction in Polar-OFDM systems under multipath fading.
• This research provides a foundation for reliable wireless communication systems utilizing advanced coding and modulation.
• Future wireless systems can achieve superior performance by concurrently implementing CSI-aware decoding and packet interleaving.