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Asynchronous WPNC With DFT Precoding and Symbol-Spaced Processing
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DOI：10.1109/LCOMM.2023.3291594.png)
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Abstract
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This letter addresses the problem of asynchronous reception in a 2-source Hierarchical MAC (H-MAC) in the context of a Wireless Physical Layer Network Coded (WPNC) system with a Hierarchical Decode and Forward (HDF) relaying strategy. In this work, we assume fractional symbol duration time delays and propose an OFDM-like transmitter side linear precoding together with symbol-spaced (SS) processing at the receiver. We derive an equivalent channel model and analyze its properties in the case of a root-raised-cosine (RRC) modulation pulse. We present a numerical evaluation of the Hierarchical Bit Error Rate (H-BER) for BPSK and QPSK alphabets.
Keywords:
Asynchronous hierarchical MAC
fractional symbol duration delay
OFDM
WPNC
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4.4
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1.3W
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