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 Efficient Time-Domain DBP using Random Step-Size and Multi-Band Quantization

2018 ◽  
Author(s):  
C. S. Martins ◽  
L. Bertignono ◽  
A. Nespola ◽  
A. Carena ◽  
F. P. Guiomar ◽  
...  
Keyword(s):  
Time Domain ◽  
Step Size ◽  
Random Step ◽  
Multi Band

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.

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