Linear Analog Network-Coded OFDM in Two-way Relay Channels
نویسندگان
چکیده
We study analog network-coded (ANC) orthogonal frequency division multiplexing (OFDM) in two-way relay channels and propose three linear analog network coding (LANC) schemes. Motivated by the fact that higher frequency diversity has been made available in the frequency-selective ANC two-way relay channels, the proposed LANC is applied to the frequencydomain OFDM signals with unitary matrices. The three LANC schemes are differentiated by the nodes at which they are implemented, namely, at the relay only, at the sources only, and at both the sources and the relay. Compared with the conventional ANC scheme, the proposed LANC schemes can exploit the frequency diversity more effectively. While the relayonly LANC provides only marginal performance improvement, significant performance gains are achieved by the source-only and source-relay LANC schemes.
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