scholarly journals Low-Complexity Partial Transmit Sequence Methods Using Dominant Time-Domain Samples for Multicarrier Faster-Than-Nyquist Signaling

IEEE Access ◽  
2019 ◽  
Vol 7 ◽  
pp. 121552-121564
Author(s):  
Biao Cai ◽  
Aijun Liu ◽  
Xiaohu Liang
Keyword(s):  
Time Domain ◽  
Low Complexity ◽  
Partial Transmit Sequence

scholarly journals Orthogonal Time Sequency Multiplexing Modulation

2021 ◽  
Author(s):  
Tharaj Thaj ◽  
Emanuele Viterbo
Keyword(s):  
Time Domain ◽  
Orthogonal Frequency Division Multiplexing ◽  
High Performance ◽  
High Mobility ◽  
Low Complexity ◽  
Modulation Scheme ◽  
Frequency Space ◽  
Time Frequency ◽  
Single Carrier ◽  
The Time Domain

This paper proposes <i>orthogonal time sequency multiplexing</i> (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 complex multiplications. We then propose two low-complexity detectors: (i) a simpler non-iterative detector based on a single tap minimum mean square time-frequency domain equalizer and (ii) an iterative time-domain detector. We demonstrate, via numerical simulations, that the proposed modulation scheme offers high performance gains over orthogonal frequency division multiplexing (OFDM) and exhibits the same performance of orthogonal time frequency space (OTFS) modulation, but with lower complexity. In proposing OTSM, along with simple detection schemes, we offer the lowest complexity solution to achieving reliable communication in high mobility wireless channels, as compared to the available schemes published so far in the literature.

Low-Complexity Time-Domain DBP Based on Random Step-Size and Partitioned Quantization

2018 ◽  
Vol 36 (14) ◽  
pp. 2888-2895 ◽  
Author(s):  
Celestino S. Martins ◽  
Luca Bertignono ◽  
Antonino Nespola ◽  
Andrea Carena ◽  
Fernando P. Guiomar ◽  
...  
Keyword(s):  
Time Domain ◽  
Low Complexity ◽  
Step Size ◽  
Random Step

scholarly journals Truck suspension incorporating inerters to minimise road damage

2020 ◽  
Vol 234 (10-11) ◽  
pp. 2693-2705
Author(s):  
Xiaofu Liu ◽  
Jason Z Jiang ◽  
Andrew Harrison ◽  
Xiaoxiang Na
Keyword(s):  
Time Domain ◽  
Damage Index ◽  
Low Complexity ◽  
Nonlinear Relationship ◽  
Heavy Vehicles ◽  
The Road ◽  
Suspension Systems ◽  
Damage Reduction ◽  
Leaf Springs ◽  
Domain Models

Road damage caused by heavy vehicles is a serious problem experienced worldwide. This paper investigates the potential for reduction in road damage by incorporating the inerter element into truck suspension systems. Initially, quarter-car, pitch-plane and roll-plane models with two low-complexity inerter-based linear suspension layouts are investigated in the frequency domain. Reductions of the J95 road damage index for each model are identified against conventional parallel spring–damper truck suspension layouts. It is also shown that the proposed suspensions are capable of enhancing the roll stability while keeping the road damage at a given level. Subsequently, the nonlinear relationship between force and displacement as manifested by leaf springs is incorporated into the pitch-plane and roll-plane time-domain models. These confirm the potential advantage of inerter-based suspension layouts for road damage reduction.

scholarly journals Low-complexity time-domain channel estimation for OFDM systems

2011 ◽  
Vol 47 (1) ◽  
pp. 60 ◽  
Author(s):  
M. Zhu ◽  
A.B. Awoseyila ◽  
B.G. Evans
Keyword(s):  
Channel Estimation ◽  
Time Domain ◽  
Low Complexity ◽  
Ofdm Systems
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