A DBF self-beam steering array antenna for mobile satellite applications using beam-space maximal-ratio combination

Tanaka, Toyohisa; Horie, A.; Karasawa, Yoshio

doi:10.1109/25.764956

Cited by 12 publications

(5 citation statements)

References 6 publications

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“…To overcome this problem, in addition to beam-space CMA, we have studied MRC in beam space [10,11], in which MRC is applied to power-selected output from a spatial FFT that gives multiple beams. From this study, the SBS array has become applicable, in principle, to largescale arrays.…”

Section: Introductionmentioning

confidence: 99%

“…From this study, the SBS array has become applicable, in principle, to largescale arrays. In [11], the difference between the elementspace and the beam-space MRC in acquisition and tracking performances is discussed: there is no significant difference between them when the received CNR in an element is above about 2 dB. The performance in element-space MRC is significantly degraded when the CNR becomes less than 4 dB, in both cases with the cut-off frequency f c , in the low-pass filter for stabilizing beam forming (beam forming LPF), at more than about 160 Hz.…”

Section: Introductionmentioning

confidence: 99%

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A land-mobile satellite tracking experiment with a DBF self-beam steering array antenna

Tanaka¹,

Horie²,

Sekiguchi³

et al. 1998

Electron. Comm. Jpn. Pt. I

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This paper discusses a land‐mobile satellite experiment and its results, on a self‐beam steering array antenna implemented by using a digital beam forming (DBF) technique with a compact digital signal processing circuit using ASICs. This antenna allows automatic and open‐loop beam steering toward an unknown signal arrival direction by simple spatial signal processing. Beam‐space maximal‐ratio combining was employed as the steering algorithm. The antenna was mounted on a test van and the basic performance was demonstrated by receiving a signal in the 1.5‐GHz band in a land‐mobile satellite channel with the Japanese ETS‐V satellite. The experiment showed stable beam steering and automatic tracking under real mobile conditions. Reacquisition of the signal arrival after shadowing was also fast enough. Moreover, steering for the direct signal arrival was not affected even with the arrival of a strong, reflected multipath signal. The possibility for optimal combination of multipath signals was demonstrated by multidirectional steering patterns. © 1998 Scripta Technica. Electron Comm Jpn Pt 1, 81(7): 1–13, 1998

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A land-mobile satellite tracking experiment with a DBF self-beam steering array antenna

Tanaka¹,

Horie²,

Sekiguchi³

et al. 1998

Electron. Comm. Jpn. Pt. I

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“…Furthermore, the other variables have the same meaning as the corresponding variables in Equation (2). For the SBH scheme, there is L = 1.…”

Section: Average Ser For the Sb And Bh Scheme With Mpskmentioning

confidence: 97%

“…Digital beamforming (DBF) techniques make use of the directionality of the beams at the transmitter or/and at the receiver, hence significantly improve the performance of wireless communication systems [1,2]. In conventional beamforming assisted systems, signals are usually transmitted in the nearly fixed directions [3,4], i.e., the signals are transmitted in a single-beam (SB) scheme.…”

Section: Introductionmentioning

confidence: 99%

Performance Analysis of Distributed-Antenna Communication Systems Using Beam-Hopping Under Strong Directional Interference

Zhu

2005

Wireless Pers Commun

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In order to efficiently mitigate the interference of directional jammers, we investigate a beam-hopping (BH) communication scheme, which includes slow beam-hopping (SBH) and fast beam-hopping (FBH) schemes. In the BH communication scheme, only one pair of the beams is used for transmission and it hops from one to the next according to an assigned BH pattern. In this contribution, a range of expressions in terms of the symbol error rate (SER) performance of the BH and conventional single-beam (SB) schemes have been derived, when both the downlink and uplink are considered. The SER performance of the BH scheme is compared with that of the SB scheme, for M-ary phase-shift keying (MPSK) and M-ary quadrature amplitude modulation (MQAM) signals under composite log normal shadowing/Nakagami-m fading channels. Our analysis and results show that the proposed BH scheme is suitable for communications, when several distributed antenna arrays are available around a mobile.

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“…Digital beamforming (DBF) techniques are capable of significantly improving the performance of wireless communications systems by efficiently making use of the directionality of the beams at the transmitter or/and at the receiver [1][2][3][4]. In conventional beamforming assisted systems, signals are usually transmitted using the schemes, which form singlebeam (SB) or multiple-beams (MB).…”

Section: Introductionmentioning

confidence: 99%

Performance evaluation of distributed‐antenna communications systems using beam‐hopping

Zhu

Yang

2005

Wireless Communications

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SummaryDigital beamforming (DBF) techniques are capable of improving the performance of communications systems significantly. However, if the transmitted signals are conflicted with strong interference especially in the direction of the transmitted beams, these directional jamming signals will severely degrade the system performance. In order to efficiently mitigate the interference of the directional jammers, in this contribution a beam-hopping (BH) communications scheme is studied. In the BH communications scheme, only one pair of the beams is used for transmission and it hops from one to the next according to an assigned BH pattern. In this contribution, a range of expressions in terms of the average signal to interference plus noise ratio (SINR) performance have been derived, when both the uplink and downlink are considered. The average SINR performance of the BH scheme and that of the conventional single-beam (SB) as well as multiple-beam (MB) assisted beam-processing schemes have been investigated. Our analysis and results show that the BH scheme is capable of efficiently combating the directional jamming, with the aid of utilizing the directional gain of the beams generated by both the transmitter and the receiver. Furthermore, the BH scheme is capable of reducing the intercept probability of the communications. Therefore, the BH scheme is suitable for communications when several distributed antenna arrays are available around a mobile.

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A DBF self-beam steering array antenna for mobile satellite applications using beam-space maximal-ratio combination

Cited by 12 publications

References 6 publications

A land-mobile satellite tracking experiment with a DBF self-beam steering array antenna

A land-mobile satellite tracking experiment with a DBF self-beam steering array antenna

Performance Analysis of Distributed-Antenna Communication Systems Using Beam-Hopping Under Strong Directional Interference

Performance evaluation of distributed‐antenna communications systems using beam‐hopping

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