Scalable Quadrature Spatial Modulation

We consider quadrature spatial modulation (QSM) schemes, which achieve high spectral efficiency (SE) via the dispersion of a relatively small number <inline-formula> <tex-math notation="LaTeX">P </tex-math></inline-formula> of <inline-formula> <tex-math not...

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Published inIEEE transactions on wireless communications Vol. 21; no. 11; pp. 9293 - 9311
Main Authors Rou, Hyeon Seok, de Abreu, Giuseppe Thadeu Freitas, Iimori, Hiroki, G., David Gonzalez, Gonsa, Osvaldo
Format Journal Article
LanguageEnglish
Published New York IEEE 01.11.2022
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Algorithms
Bit error rate
Complexity theory
Design optimization
Dispersion
Iterative methods
low-complexity
massive MIMO
Modulation
optimality
Parameterization
Quadrature spatial modulation
Quadratures
Receivers
scalablility
space-time coding
Symbols
Transmitters
Wireless communication
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Abstract We consider quadrature spatial modulation (QSM) schemes, which achieve high spectral efficiency (SE) via the dispersion of a relatively small number <inline-formula> <tex-math notation="LaTeX">P </tex-math></inline-formula> of <inline-formula> <tex-math notation="LaTeX">M </tex-math></inline-formula>-ary modulated symbols over a large number of combinations of <inline-formula> <tex-math notation="LaTeX">n_{T} </tex-math></inline-formula> transmit antennas and <inline-formula> <tex-math notation="LaTeX">T </tex-math></inline-formula> transmit instances. In particular, we design a new space-time block code (STBC)-based scalable QSM scheme combining high SE with maximum diversity and optimum coding gains. Deriving a closed-form expression for the optimum SE, we show that scaling the size <inline-formula> <tex-math notation="LaTeX">T </tex-math></inline-formula> with <inline-formula> <tex-math notation="LaTeX">n_{T} </tex-math></inline-formula> not only is required to achieve SE optimality, but also results in further gains in bit error rate (BER) performance. Building on the latter optimal parameterization, a fully optimized scalable QSM (OS-QSM) transmitter design is then obtained by introducing a new dispersion matrix index selection algorithm that ensures even utilization of spatial-temporal resources. Finally, a new greedy boxed iterative shrinkage thresholding algorithm (GB-ISTA) QSM receiver is proposed, which exploits the inherent sparsity of QSM signals and while detecting spatially and digitally modulated bits in a greedy fashion. The resulting low complexity of the new receiver, which is linear on <inline-formula> <tex-math notation="LaTeX">n_{T} </tex-math></inline-formula>, enables the utilization of OS-QSM in systems of previously prohibitive dimensions.
AbstractList We consider quadrature spatial modulation (QSM) schemes, which achieve high spectral efficiency (SE) via the dispersion of a relatively small number [Formula Omitted] of [Formula Omitted]-ary modulated symbols over a large number of combinations of [Formula Omitted] transmit antennas and [Formula Omitted] transmit instances. In particular, we design a new space-time block code (STBC)-based scalable QSM scheme combining high SE with maximum diversity and optimum coding gains. Deriving a closed-form expression for the optimum SE, we show that scaling the size [Formula Omitted] with [Formula Omitted] not only is required to achieve SE optimality, but also results in further gains in bit error rate (BER) performance. Building on the latter optimal parameterization, a fully optimized scalable QSM (OS-QSM) transmitter design is then obtained by introducing a new dispersion matrix index selection algorithm that ensures even utilization of spatial-temporal resources. Finally, a new greedy boxed iterative shrinkage thresholding algorithm (GB-ISTA) QSM receiver is proposed, which exploits the inherent sparsity of QSM signals and while detecting spatially and digitally modulated bits in a greedy fashion. The resulting low complexity of the new receiver, which is linear on [Formula Omitted], enables the utilization of OS-QSM in systems of previously prohibitive dimensions.
We consider quadrature spatial modulation (QSM) schemes, which achieve high spectral efficiency (SE) via the dispersion of a relatively small number <inline-formula> <tex-math notation="LaTeX">P </tex-math></inline-formula> of <inline-formula> <tex-math notation="LaTeX">M </tex-math></inline-formula>-ary modulated symbols over a large number of combinations of <inline-formula> <tex-math notation="LaTeX">n_{T} </tex-math></inline-formula> transmit antennas and <inline-formula> <tex-math notation="LaTeX">T </tex-math></inline-formula> transmit instances. In particular, we design a new space-time block code (STBC)-based scalable QSM scheme combining high SE with maximum diversity and optimum coding gains. Deriving a closed-form expression for the optimum SE, we show that scaling the size <inline-formula> <tex-math notation="LaTeX">T </tex-math></inline-formula> with <inline-formula> <tex-math notation="LaTeX">n_{T} </tex-math></inline-formula> not only is required to achieve SE optimality, but also results in further gains in bit error rate (BER) performance. Building on the latter optimal parameterization, a fully optimized scalable QSM (OS-QSM) transmitter design is then obtained by introducing a new dispersion matrix index selection algorithm that ensures even utilization of spatial-temporal resources. Finally, a new greedy boxed iterative shrinkage thresholding algorithm (GB-ISTA) QSM receiver is proposed, which exploits the inherent sparsity of QSM signals and while detecting spatially and digitally modulated bits in a greedy fashion. The resulting low complexity of the new receiver, which is linear on <inline-formula> <tex-math notation="LaTeX">n_{T} </tex-math></inline-formula>, enables the utilization of OS-QSM in systems of previously prohibitive dimensions.
Author de Abreu, Giuseppe Thadeu Freitas
Rou, Hyeon Seok
G., David Gonzalez
Iimori, Hiroki
Gonsa, Osvaldo
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Snippet We consider quadrature spatial modulation (QSM) schemes, which achieve high spectral efficiency (SE) via the dispersion of a relatively small number...
We consider quadrature spatial modulation (QSM) schemes, which achieve high spectral efficiency (SE) via the dispersion of a relatively small number [Formula...
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SubjectTerms Algorithms
Bit error rate
Complexity theory
Design optimization
Dispersion
Iterative methods
low-complexity
massive MIMO
Modulation
optimality
Parameterization
Quadrature spatial modulation
Quadratures
Receivers
scalablility
space-time coding
Symbols
Transmitters
Wireless communication
Title Scalable Quadrature Spatial Modulation
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