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This paper proposes a novel and simple orthogonal faster than Nyquist (OFTN)data transmission and detection approach for a single input multiple output(SIMO) system. It is assumed that the signal having a bandwidth $B$ istransmitted through a wireless channel with $L$ multipath components. Underthis assumption, the current paper provides a novel and simple OFTNtransmission and symbol-by-symbol detection approach that exploits themultiplexing gain obtained by the multipath characteristic of wideband wirelesschannels. It is shown that the proposed design can achieve a highertransmission rate than the existing one (i.e., orthogonal frequency divisionmultiplexing (OFDM)). Furthermore, the achievable rate gap between the proposedapproach and that of the OFDM increases as the number of receiver antennasincreases for a fixed value of $L$. This implies that the performance gain ofthe proposed approach can be very significant for a large-scale multi-antennawireless system. The superiority of the proposed approach is showntheoretically and confirmed via numerical simulations. {Specifically, we havefound {upper-bound average} rates of 15 bps/Hz and 28 bps/Hz with the OFDM andproposed approaches, respectively, in a Rayleigh fading channel with 32 receiveantennas and signal to noise ratio (SNR) of 15.3 dB. The extension of theproposed approach for different system setups and associated research problemsis also discussed.

Multipath Multiplexing for Capacity Enhancement in SIMO Wireless Systems