Reduced Complexity Sphere Decoder for Spatial Modulation Detection Receivers

Younis, Abdelhamid; Mesleh, Raed; Haas, Harald; Grant, Peter

doi:10.1109/glocom.2010.5683993

Cited by 75 publications

(72 citation statements)

References 10 publications

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“…In addition, unlike other MIMO schemes, the number of receive antennas is independent of the number of transmit antennas. Several articles are available in literature which are aimed at understanding and improving the performance of SM in various scenarios, e.g., [6][7][8]. The study in [6] seeks to improve the ABER performance of SM by introducing trellis coding on the transmitting antennas.…”

Section: Introductionmentioning

confidence: 99%

Multiple access spatial modulation

Serafimovski

Sinanović

Renzo

et al. 2012

J Wireless Com Network

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In this study, we seek to characterise the behaviour of Spatial modulation (SM) in the multiple access scenario. By only activating a single transmit antenna for any transmission, SM entirely avoids inter-channel interference, requires no synchronisation between the transmit antennas and a single radio frequency chain at the transmitter. Most contributions thus far have only addressed aspects of SM for a point-to-point communication system. We propose a maximum-likelihood (ML) detector which can successfully decode incoming data from multiple simultaneous transmissions and does not suffer from the near-far problem. We analyse the performance of the interference-unaware and interference-aware detectors. We look at the behaviour of SM as the signal-to-interference-plus-noise ratio goes to infinity and compare it to the complexity and cost equivalent single-input-multiple-output (SIMO) system. Two systems are considered to be equivalent in terms of complexity if their respective detection algorithms are of the same order in O(·) notation. Simulation results show that the interference-aware SM detector performs better than the complexity equivalent multi-user ML-SIMO detector by at least 3 dB at an average bit-error-ratio of 10 −3 .

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Section: Introductionmentioning

confidence: 99%

Multiple access spatial modulation

Serafimovski

Sinanović

Renzo

et al. 2012

J Wireless Com Network

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“…Moreover, sphere decoding (SD) based detector [14] and hybrid detector [15] (combining ML and MRC) could also be applied to the proposed VSM, which, however are omitted here for similarity. In summary, the detection complexity of the proposed VSM is actually the same as the conventional SSK with 2 physical TAs.…”

Section: Detectionmentioning

confidence: 99%

Virtual Spatial Modulation for MIMO Systems

Zhu

Hanzo

Wang

et al. 2016

2016 IEEE Global Communications Conference (GLOBECOM)

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Abstract-Compared with the conventional amplitude phase modulation (APM), spatial modulation (SM) is a low-complexity, yet energy-efficient transmission technique, whereby transmit antenna (TA) indices are utilized to convey the information. However, the number of the required TAs grows exponentially with the number of transmitted bits, which leads to unacceptable pilot overhead for channel estimation in practical systems. To reduce the number of TAs whereas keep the data rate unchanged, virtual spatial modulation (VSM) is proposed in the first time. Specifically, by activating multiple TAs with their corresponding analog phase shifters (APSs), massive equivalent channel vectors could be constructed based on the combinations of original channel vectors from different TAs and their phase rotations. By way of mapping each equivalent channel vector to a virtual transmit antenna (VTA) index which might convey the information, the number of the required TAs could grow linearly with the number of transmitted bits. Furthermore, the selection of a VTA subset from all available VTAs is formulated as a combinatorial optimization problem to maximize the minimal Euclidean distance (ED) among the equivalent channel vectors. A spatial constellation optimizing (SCO) algorithm is proposed to obtain a near-optimal solution to this problem with lowcomplexity. Simulation results demonstrate that the proposed VSM is able to achieve lower bit error rate (BER) under the same transmit rate compared with the conventional SM and APM schemes.

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“…Furthermore, the configurations related to the number of transmit and receive antennas are flexible in contrast to the restrictions applied in MIMO spatial multiplexing [1][2][3]6]. Initial research was dedicated to improve the SM and SSK systems performance through designing low complexity receiver algorithms that minimize the Bit Error Rate (BER) [7][8][9]. However, Transmit Precoding (TPC) as a preprocessing technique on the transmitter side, with possible feedback from the receiver side, has lately shown remarkable performance gains [10,11].…”

Section: Introductionmentioning

confidence: 99%

Performance Improvement of Space Shift Keying MIMO Systems with Orthogonal Codebook-Based Phase-Rotation Precoding

Alansi

Aljunid

Sourour

2017

Wireless Communications and Mobile Computing

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This paper considers codebook-based precoding for Space Shift Keying (SSK) modulation MIMO system. Codebook-based precoding avoids the necessity for full knowledge of Channel State Information (CSI) at the transmitter and alleviates the complexity of generating a CSI-optimized precoder. The receiver selects the codeword that maximizes the Minimum Euclidean Distance (MED) of the received constellation and feeds back its index to the transmitter. In this paper, we first develop a new accurate closed-form Bit Error Rate (BER) for SSK without precoding. Then, we investigate several phase-rotation codebooks with quantized set of phases and systematic structure. Namely, we investigate the Full-Combination, Walsh-Hadamard, Quasi-Orthogonal Sequences, and Orthogonal Array Testing codebooks. In addition, since the size of the Full-Combination codebook may be large, we develop an iterative search method for fast selection of its best codeword. The proposed codebooks significantly improve the BER performance in Rayleigh and Nakagami fading channels, even at high spatial correlation among transmit antennas and CSI estimation error. Moreover, we show that only four phases {+1, + , −1, − } are sufficient and further phase granularity does yield significant gain. This avoids hardware multiplication during searching the codebook and applying the codeword.

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Reduced Complexity Sphere Decoder for Spatial Modulation Detection Receivers

Cited by 75 publications

References 10 publications

Multiple access spatial modulation

Multiple access spatial modulation

Virtual Spatial Modulation for MIMO Systems

Performance Improvement of Space Shift Keying MIMO Systems with Orthogonal Codebook-Based Phase-Rotation Precoding

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