Mobile communication system with a hybrid phased array antenna system

Ivanov, Andrey; Teplyakov, V. D.; Калинин, В. А.

doi:10.1109/ewdts.2015.7493178

Cited by 7 publications

(5 citation statements)

References 6 publications

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“…Follows the parameter setup in [23], N s = n sub × n r = (4 × 4) × (21 × 21), indicating that the analog beam formed by the 4 × 4 analogue subarray is much wider than the digital beam, which is formed by the combination of the 441 analogue subarrays. Therefore, we assume a predetermined W m = Wm is applied to illuminate a fixed terrestrial area A m , where the majority of the terrestrial receivers are based.…”

Section: B Analog Beamforming and Motivational Problemsmentioning

confidence: 74%

“…In this paper, the exact structure of the transmit antenna is based on the one proposed in [23]. The total antenna elements is divided into n r subarrays, each of which contains n sub = N s /n r antenna elements and is connected to an RF chain.…”

Section: B Analog Beamforming and Motivational Problemsmentioning

confidence: 99%

“…One significant difference between M-MIMO applied to cellular and satellite networks is that the number of radio frequency (RF) chains is much higher in the satellite phased array antenna, resulting in high computational complexity, e.g. the phased array antenna for the LEO satellite proposed in [23] contains 221 RF chains whereas in studies for terrestrial networks [19]- [22], the number is seldomly more than 10 or 20. In cellular networks, zero-forcing or block diagonalization is typically applied in digital beamformings without severely compromising the performance due to channel sparsity, as studied in [20]- [22].…”

Section: Introductionmentioning

confidence: 99%

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Novel Distributed Beamforming Algorithms for Heterogeneous Space Terrestrial Integrated Network

Shi

Liu

Thompson

2022

IEEE Internet Things J.

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An integrated space-terrestrial network based on the ultra-dense low-earth-orbit (LEO) satellite constellations has been envisioned in both 5G and beyond 5G (B5G) networks. This approach is a powerful solution to some key challenges from Internet-of-Thing (IoT) services, such as the lack of link capacity to deal with large data transfer or coverage in the remote areas. This paper focuses on the beamforming design for the transmissions from multiple LEO satellites, equipped with massive phased array antenna, to a large number of heterogeneous terrestrial terminals. Superposition coding based beamforming is efficient in dealing with the receiver heterogeneity, but at the cost of higher computational complexity. Based on the dual decomposition theory as well as deep-neural-networks (DNNs), this paper proposes to combine the non-linear approximation ability of DNNs with distributed algorithms. This combination not only supports advanced non-orthogonal beamforming algorithms for achieving superior throughput performance, but also keeps the overall computational complexity low and enables the beamforming process to be speed up dramatically through parallel computing.

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Section: B Analog Beamforming and Motivational Problemsmentioning

confidence: 74%

Section: B Analog Beamforming and Motivational Problemsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Novel Distributed Beamforming Algorithms for Heterogeneous Space Terrestrial Integrated Network

Shi

Liu

Thompson

2022

IEEE Internet Things J.

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“…Simultaneously, low sidelobe and bare nulls in directional diagrams can be achieved using array synthesis, enhancing the system's ability to withstand interference and producing more dependable and stable communication lines. Because of their outstanding performance and rapid development, phased array antennas are gaining importance and are extensively applied in the field of advanced military [7][8][9][10] and commercial applications [11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

Design of a Ka-Band Heterogeneous Integrated T/R Module of Phased Array Antenna

Zeng,

Chen,

et al. 2024

Electronics

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The central element of a phased array antenna that performs beam electrical scanning, as well as signal transmission and reception, is the transceiver (T/R) module. Higher standards have been set for the integration, volume, power consumption, stability, and environmental adaptability of T/R modules due to the increased operating frequency of phased array antennas, the variability of application platforms, and the diversified development of system functions. Device-based multichannel T/R modules are the key to realizing low-profile Ka-band phased array antenna microsystem architecture. The design and implementation of a low-profile, high-performance, and highly integrated Ka-band phased array antenna T/R module are examined in this paper. Additionally, a dependable Ka-band four-channel T/R module based on Si/GaAs/Low Temperature Co-fired Ceramic (LTCC), applying multi-material heterogeneous integration architecture, is proposed and fabricated. The chip architecture, transceiver link, LTCC substrates, interconnect interface, and packaging are all taken into consideration when designing the T/R module. When compared to a standard phased array antenna, the module’s profile shrunk from 40 mm to 8 mm, and its overall dimensions are only 10.8 mm × 10 mm × 3 mm. It weighs 1 g, and with the same specs, the single channel volume was reduced by 95%. The T/R module has an output power of ≥26 dBm for single-channel transmission, an efficiency of ≥25%, and a noise factor of ≤4.4 dB. When compared to T/R modules based on System-on-Chip (SOC) devices, the RF performance has significantly improved, as seen by an increase in single channel output power and a decrease in the receiving noise factor. This work lays a foundation for the devitalization and engineering application of T/R modules in highly reliable application scenarios.

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“…E-mails: an.ivanov@skoltech.ru, alexander.osinsky@skoltech.ru, R.Bychkov@skoltech.ru, kkalinin@list.ru, d.lakontsev@skoltech.ru stands as the best candidate for precoding [6]. It employs both digital and analog beamforming [7], [8]. The second is implemented via phase-shifters that reduce an overall complexity [9].…”

Section: Introductionmentioning

confidence: 99%

Selective tone reservation for PAPR reduction in wireless communication systems

Ivanov

Lakontsev

2017

2017 IEEE International Workshop on Signal Processing Systems (SiPS)

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In this paper, we propose a trainable least squares (LS) approach for reducing the peak-to-average power ratio (PAPR) of orthogonal frequency division multiplexing (OFDM) signals in a hybrid beamforming (HBF) system.Compared to digital beamforming (DBF), in HBF technology the number of antennas exceeds the number of digital ports. Therefore, PAPR reduction capabilities are restricted by both a limited bandwidth and the reduced size of digital space. The problem is to meet both conditions. Moreover, the major HBF advantage is a reduced system complexity, thus the complexity of the PAPR reduction algorithm is expected to be low.To justify the performance of the proposed trainable LS, we provide a performance bound achieved by convex optimization using the CVX Matlab package. Moreover, the complexity of the proposed algorithm can be comparable to the minimal complexity of the digital "twin" calculation in HBF. The abovementioned features prove the feasibility of the trained LS for PAPR reduction in fully-connected HBF.

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Mobile communication system with a hybrid phased array antenna system

Cited by 7 publications

References 6 publications

Novel Distributed Beamforming Algorithms for Heterogeneous Space Terrestrial Integrated Network

Novel Distributed Beamforming Algorithms for Heterogeneous Space Terrestrial Integrated Network

Design of a Ka-Band Heterogeneous Integrated T/R Module of Phased Array Antenna

Selective tone reservation for PAPR reduction in wireless communication systems

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