Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: BER Performance of Polar Coded OFDM in Multipath Fading   Orthogonal Frequency Division Multiplexing (OFDM) has gained a lot of
popularity over the years. Due to its popularity, OFDM has been adopted as a
standard in cellular technology and Wireless Local Area Network (WLAN)
communication systems. To improve the bit error rate (BER) performance, forward
error correction (FEC) codes are often utilized to protect signals against
unknown interference and channel degradations. In this paper, we apply
soft-decision FEC, more specifically polar codes and a convolutional code, to
an OFDM system in a quasi-static multipath fading channel, and compare BER
performance in various channels. We investigate the effect of interleaving bits
within a polar codeword. Finally, the simulation results for each case are
presented in the paper.

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The categories of this paper are: quant-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: eess
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The categories of this paper are: atom-ph
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The categories of this paper are: hep-ph
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The categories of this paper are: q-fin
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The categories of this paper are: dg-ga
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-th
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The categories of this paper are: chao-dyn
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The categories of this paper are: acc-phys
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The categories of this paper are: stat
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The categories of this paper are: cond-mat
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The categories of this paper are: physics
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The categories of this paper are: q-bio
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The categories of this paper are: adap-org