Generalized Quadrature Spatial Modulation Scheme Using Antenna Grouping

Castillo-Soria, Francisco R.; Cortez, Joaquín; Ramirez-Gutierrez, Raymundo; Maciel‐Barboza, Fermín Marcelo; Soriano‐Equigua, Leonel

doi:10.4218/etrij.17.0117.0162

Cited by 31 publications

(34 citation statements)

References 18 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a result, QSM has the advantage of doubling the number of bits that can be transmitted in the spatial constellation. Proposals for enhancing the performance of the SM/QSM scheme include for example; precoding [6], trellis code modulation [7], differential spatial modulation [8], antenna selection [9], combined QSM-spatial multiplexing (SMux) [10], and low complexity detection algorithms [11] among others.…”

Section: Introductionmentioning

confidence: 99%

EQSM-based multiuser MIMO downlink transmission for correlated fading channels

Castillo-Soria

Gutiérrez

García-Barrientos

et al. 2020

J Wireless Com Network

View full text Add to dashboard Cite

This paper presents three multiuser multiple input-multiple output (MU-MIMO) downlink transmission strategies based on the extended quadrature spatial modulation (EQSM) system for mobile communication. The three MU-MIMO precoding strategies utilised are block diagonalisation (BD), dirty paper coding (DPC), and a combined BD-DPC strategy. We analyse and compare the performance of these three MU-MIMO-EQSM schemes with the conventional MU-MIMO spatial multiplexing (MU-MIMO-SMux) system in terms of bit error rate (BER) and detection complexity considering correlated and uncorrelated fading channels. Results show that the BD-MIMO-EQSM and DPC-MIMO-EQSM systems outperform by 2 − 3 dB in BER performance their conventional counterparts with the additional advantage of a detection complexity reduction of up to 62% for the analysed cases. For the uncorrelated fading channel, the BD technique has better BER performance for a spectral efficiency (SE) of 12 bits per channel use (bpcu), while the DPC technique has better BER performance for an SE of 8 bpcu. Considering the correlated channel, DPC suffers a deep BER degradation of up to 30 dB compared with BD. However, still in this scenario, both proposed MU-MIMO-EQSM systems outperform their conventional counterparts. In terms of detection complexity, DPC has a complexity reduction of 77% as compared with the BD technique. The BD-DPC-MIMO-EQSM hybrid system heritages the low detection complexity of DPC with the advantage of all users in the system having the same BER performance.

show abstract

Section: Introductionmentioning

confidence: 99%

EQSM-based multiuser MIMO downlink transmission for correlated fading channels

Castillo-Soria

Gutiérrez

García-Barrientos

et al. 2020

J Wireless Com Network

View full text Add to dashboard Cite

show abstract

“…Quadrature spatial modulation (QSM) is another technique that extends the spatial constellation into in-phase and quadrature dimensions that are used to transmit the real and imaginary part, respectively, of a single signal symbol [14]. In [15], a generalized QSM (GQSM) that combines the benefits of spatial multiplexing and QSM was proposed. Antennas are grouped and independent QSM modulation is performed in each group.…”

Section: Introductionmentioning

confidence: 99%

Generalized Complex Quadrature Spatial Modulation

Mohaisen

2019

Wireless Communications and Mobile Computing

View full text Add to dashboard Cite

Spatial modulation (SM) is a multiple-input multiple-output (MIMO) system that achieves a MIMO high spectral efficiency while maintaining the transmitter computational complexity and requirements as low as those of the single-input systems. The complex quadrature spatial modulation (CQSM) builds on the QSM scheme and improves the spectral efficiency by transmitting two signal symbols at each channel use. In this paper, we propose two generalizations of CQSM, namely, generalized CQSM with unique combinations (GCQSM-UC) and with permuted combinations (GCQSM-PC). These two generalizations perform close to CQSM or outperform it, depending on the system parameters. Also, the proposed schemes require much less transmit antennas to achieve the same spectral efficiency of CQSM, for instance, assuming 16-QAM, GCQSM-PC, and GCQSM-UC require 10 and 15 transmit antennas, respectively, to achieve the same spectral of CQSM which is equipped with 32 antennas.

show abstract

“…In the generalized QSM (GQSM), the antenna set is divided into equal‐size groups, and the QSM is performed independently in each group, using different signal symbols. To achieve such improvement in the spectral efficiency, the receiver's complexity and the number of RF chains at the transmitter are increased . Another technique combines the features of spatial multiplexing (SMx) and SM to increase the spectral efficiency.…”

Section: Introductionmentioning

confidence: 99%

“…The transmit antennas are split into subgroups, and the conventional SM is applied independently in each subgroup, allowing the simultaneous transmission of multiple signal symbols . As in Castillo‐Soria et al, the required number of RF chains is equivalent to the number of antenna subgroups. An improved QSM (IQSM) transmits two signal symbols at each channel use, instead of only one as in QSM, to achieve higher spectral efficiency .…”

Section: Introductionmentioning

confidence: 99%

“…To achieve such improvement in the spectral efficiency, the receiver's complexity and the number of RF chains at the transmitter are increased. 13 Another technique combines the features of spatial multiplexing (SMx) and SM to increase the spectral efficiency. The transmit antennas are split into subgroups, and the conventional SM is applied independently in each subgroup, allowing the simultaneous transmission of multiple signal symbols.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Constellation design and performance analysis of the parallel spatial modulation

Mohaisen

2019

Int J Communication

View full text Add to dashboard Cite

Summary Spatial modulation (SM) is a relatively recent multiple‐input multiple‐output (MIMO) system in which information is carried by the index of the antenna used for transmission as well as by the conventional signal symbols. Several systems that build upon SM have since been proposed including the generalized SM (GSM), a variant of GSM with multiple active antennas (MA‐SM), quadrature SM (QSM), and parallel SM (PSM), among others. The PSM system can increase the spectral efficiency by splitting the antenna set into groups and applying SM independently in each group using the same signal symbol. In this paper, we first derive the upper bound on the error probability of the PSM. The search of the optimal constellation set is then formulated as a multi‐objective optimization problem, where the obtained constellation minimizes the asymptotic error probability. We conclude that as the number of antenna groups increases, the proposed constellation converges to the conventional phase‐shift keying at relatively low number of transmit antennas. The simulation results show that the proposed constellation outperforms conventional constellations by as much as 5 dB, for high‐modulation orders. Since the multi‐objective optimization is independent of the channel matrix, it can be easily done off‐line. This implies that these gains come at no complexity or delay cost.

show abstract

Generalized Quadrature Spatial Modulation Scheme Using Antenna Grouping

Cited by 31 publications

References 18 publications

EQSM-based multiuser MIMO downlink transmission for correlated fading channels

EQSM-based multiuser MIMO downlink transmission for correlated fading channels

Generalized Complex Quadrature Spatial Modulation

Constellation design and performance analysis of the parallel spatial modulation

Contact Info

Product

Resources

About