This paper proposes orthogonal time sequency multiplexing (OTSM), a novel single carrier
modulation scheme that places information symbols in the delay-sequency domain followed
by a cascade of time-division multiplexing (TDM) and Walsh-Hadamard sequence
multiplexing. Thanks to the Walsh Hadamard transform (WHT), the modulation and
demodulation do not require complex domain multiplications. For the proposed OTSM, we
first derive the input-output relation in the delay-sequency domain and present a low …

This paper proposes orthogonal time sequency multiplexing (OTSM), a novel single carrier
modulation scheme based on the well known Walsh-Hadamard transform (WHT) combined
with row-column interleaving, and zero padding (ZP) between blocks in the time-domain.
The information symbols in OTSM are multiplexed in the delay and sequency domain using
a cascade of time-division and Walsh-Hadamard (sequency) multiplexing. By using the WHT
for transmission and reception, the modulation and demodulation steps do not require any …