A Novel Digital Beamformer With Low Angle Resolution for Vehicle Tracking Radar

Singh, Ajay; Kumar, Pradeep; Chakravarty, Tapas; Singh, Ghanshyam; Bhooshan, Sunil

doi:10.2528/pier06112102

Cited by 32 publications

(27 citation statements)

References 9 publications

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“…Attempts have been made in recent years to broaden the frequency coverage [5]. In certain instruments based on the principle of radio interferometer [12], the intensity of the signal plays an important role in phase detection. If the signal to noise ratio is weak, the phase information might not be recovered correctly, especially when the source of the signal is amplitude modulated.…”

Section: Introductionmentioning

confidence: 99%

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An Innovative Portable Ultra Wide Band Stereophonic Radio Direction Finder

Joardar¹,

Jaint²,

Bandewar³

et al. 2008

PIER

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Abstract-A portable ultra wide band radio direction finder has been constructed based on the principle of stereophonic direction recognition of sound by human ears. The instrument consists of two log periodic antennas having identical electrical properties. They are positioned in a plane, preferably parallel to the ground. The directivities of the antennas are aligned at slightly different directions with respect to each other. Their output powers are compared at the source frequency for the respective polarizations. The back lobes of the antennas have been reduced by symmetrically positioning two metallic plates (reflectors) behind the antennas. The antennas, reflectors and a compass are mounted over a video camera stand such that they could be manually positioned in the azimuth. Since the antennas are of identical make, ideally the radiation pattern of either antennareflector combination should behave as a flipped image of the other set. For any particular polarization and frequency, the outputs from the antennas are compared with each other. The antenna assembly is rotated between 0 and 360 • in the azimuth until the power difference gets minimized. This position relates to the direction of the source and is indicated on the compass, provided there exits a single radio source at that frequency.

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Section: Introductionmentioning

confidence: 99%

“…Several radio direction finders have been built in the past [1][2][3][4][5][6][7][8][9][10][11][12][13][14]. Different techniques have been employed in different instruments.…”

Section: Introductionmentioning

confidence: 99%

An Innovative Portable Ultra Wide Band Stereophonic Radio Direction Finder

Joardar¹,

Jaint²,

Bandewar³

et al. 2008

PIER

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“…Multiple-input multiple-output (MIMO) antenna systems have the potential to improve the performance of communication and radar system [1][2][3][4][5][6][7][8]. Recently, there are two main directions in this research area.…”

Section: Introductionmentioning

confidence: 99%

Design of a Sparse Antenna Array for Communication and Direction Finding Applications Based on the Chinese Remainder Theorem

Hong¹,

Song²,

Sun³

2009

PIER

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Abstract-In this paper we propose a sparse antenna array with nine elements for the integrated system of communication and direction finding. The main idea is that the sparse antenna array, whose element spacing is relatively larger than half wavelength, are divided into six two-element subarrays to transmit multi-beam. According to the spatial correlation characteristics of multi-beam, a packet exciting method employing multi-carrier Orthogonal Frequency Division Multiplexing (OFDM) signal is designed to modulate the directional information into the signal space of subcarriers. In this way, a receiver with a single antenna can accomplish communication and direction-finding function by demodulation received signal. For the direction finding algorithm of the sparse antenna array, an approximate algorithm is designed to resolve the ambiguity problem based on the Chinese remainder theorem. Simulation results show that the proposed sparse antenna array can be applied to the integrated application of communication and direction finding.

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“…In recent years, new techniques are applied in various radar systems [1][2][3][4][5][6][7][8][9][10]. The threat of electronic jamming to military radar is well known.…”

Section: Introductionmentioning

confidence: 99%

New Anti-Arm Technique by Using Random Phase and Amplitude Active Decoys

Emadi¹,

Jafargholi²,

Moghadam³

et al. 2008

PIER

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Abstract-This paper presents a new method to counter Anti Radiation Missile (ARM) threats, which is effective against advanced ARM. By using random phase and amplitude active decoys in the specified optimum positions and network implementation we show that ARM threats will be removed profoundly. Also, iterative methods are presented to cancel the internal interference effects in the proposed structure.

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A Novel Digital Beamformer With Low Angle Resolution for Vehicle Tracking Radar

Cited by 32 publications

References 9 publications

An Innovative Portable Ultra Wide Band Stereophonic Radio Direction Finder

An Innovative Portable Ultra Wide Band Stereophonic Radio Direction Finder

Design of a Sparse Antenna Array for Communication and Direction Finding Applications Based on the Chinese Remainder Theorem

New Anti-Arm Technique by Using Random Phase and Amplitude Active Decoys

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