A reconfigurable active retrodirective/direct conversion receiver array for wireless sensor systems

Miyamoto, Ryo; Qian, Yongxi; Itoh, T.

doi:10.1109/mwsym.2001.967088

Cited by 24 publications

(4 citation statements)

References 9 publications

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“…In this simulation, an interference source at angular position −5 • was supposed. Then the resulting complex weights at specific angular positions were applied to a traditional phased array, to verify that the proposed approach gives the desired complex weight for Equation (22) to synthesize the beam towards the UAV and NULL towards the interference source. Figure 4 shows the formed beam at different UAV angular positions.…”

Section: Eliminate Predefined Interference Signalmentioning

confidence: 99%

“…This paper presents a new structure of tracking array that has the ability to achieve auto forming of the reception beam towards the angular position of the UAV without the need of complex signal processing algorithms used in smart antenna. The proposed structure makes mixing between phased array and retrodirective array [20][21][22][23][24], where the phase conjugation technique and complex vector multiplication are used together to generate the geometric phase of each channel. The resulting array gives a permanent high gain downlink between the UAV and the GCS, so widening the beamwidth to be equal to the FOV without reducing the gain and with null steering ability to eliminate the predefined interference signal.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Auto Angular Tracking of Uav Based on Mixed Phased/Retrodirective Array

Salman¹,

Almekdad²,

Alhariri³

2019

PIER C

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A mixed phased array and retrodirective array providing auto tracking of the angular position of the unmanned aerial vehicle (UAV) is presented. The phase conjugation technique and complex vector multiplication are used together to find the geometric phase of each channel canceling the need to use direction finding algorithm (DOA). After generating the phase conjugated version of the received signal on each channel, its complex vector representation will be multiplied by the complex vector representation of the received signal on the reference channel. The UAV will stay on the beak of the array factor during its movement within the field of view (FOV), and a permanent high gain data link is obtained without the need of the tracking algorithm. The beamwidth of the resulted array is widened to be equal to the FOV. The computational cost of the tracking system will be reduced due to canceling the need of using the complex processing algorithms (DOA, and tracking) used in smart antenna. Direction finding algorithm, beamforming algorithm, and tracking algorithm are combined in one algorithm. The least square error pattern synthesis with nulls method is used to eliminate the predefined interference signals and add null steering ability to the resulted array. The effect of the phase errors is reduced to the case of single antenna due to including the phase errors of each channel in its complex weights. The beam pointing error is taken as a metric to evaluate the performance of the resulted array compared with the BPE of a phased array using the monopulse tracking method.

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Section: Eliminate Predefined Interference Signalmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Auto Angular Tracking of Uav Based on Mixed Phased/Retrodirective Array

Salman¹,

Almekdad²,

Alhariri³

2019

PIER C

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show abstract

“…In [22,23], a reconfigurable array is proposed which can serve as both a retrodirective array and a direct conversion receiver by changing the LO frequency. The switching is initiated by the header code contained in the signal from the interrogator.…”

Section: A Reconfigurable Arraymentioning

confidence: 99%

Overview on the Phase Conjugation Techniques of the Retrodirective Array

Chen

Guo²,

Shi

et al. 2010

International Journal of Antennas and Propagation

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“…Augment the signal quality of the radio-based system through more focused transmission of radio signals while enhancing capacity through increased frequency reuse are the purposes of smart antenna systems (3)(4)(5).…”

Section: Destinations Of Smart Antenna Systemsmentioning

confidence: 99%

Possible Use of Smart Antennas for Development of Intelligent Communication Systems

Pattanaik¹,

Mishra²

2009

Int. Jour. Intel. Elec. Sys.

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Intelligent systems are nature-inspired, mathematically sound, computationally intensive problem solving tools and methodologies that have become important for future communication. Intelligent systems will enable safe, cost and missioneffective approaches to meet the technical specifications. SS7, INAP, CAMEL, WIN, GSM MAP, and ANSI-41 were used in traditional intelligence in mobile. Mobile networks are evolving beyond traditional network intelligence and known as Intelligent Mobile Network. Due to the advancement of technologies such as smart antennas and intelligent BSS/OSS systems are deployed to provide greater efficiencies and more effective network operations and as a result the network is becoming more intelligent. Next generation networks of the near future will leverage all of these technologies in conjunction with traditional network intelligence for more efficient and effective operations as well as the provision of advanced and value-added services. In this paper the use of smart in the possible development of intelligent communication systems is discussed.

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A reconfigurable active retrodirective/direct conversion receiver array for wireless sensor systems

Cited by 24 publications

References 9 publications

Auto Angular Tracking of Uav Based on Mixed Phased/Retrodirective Array

Auto Angular Tracking of Uav Based on Mixed Phased/Retrodirective Array

Overview on the Phase Conjugation Techniques of the Retrodirective Array

Possible Use of Smart Antennas for Development of Intelligent Communication Systems

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