Electro-optic millimeter-wave harmonic downconversion and vector demodulation using cascaded phase modulation and optical filtering

Pagán, V. R.; Murphy, Thomas E.

doi:10.1364/ol.40.002481

Cited by 50 publications

(11 citation statements)

References 16 publications

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“…Many image-rejection down-converters based on cascaded modulators and phase cancellation have been proposed by using Hartley structure [23][24][25][26][27][28][29]. A dual-parallel Mach-Zehnder modulator (DPMZM) and a MZM with individual transfer features are cascaded for two perpendicular polarized light waves [23].…”

Section: Comentioning

confidence: 99%

“…For image rejection in down-conversion, introducing the quadrature phase difference between the target RF and IM down-converted signals is crucial for phase cancellation. This quadrature phase shift can be generated by an electrical hybrid coupler (HC) [24,25]. Phase modulators (PMs) are cascaded to realize down-conversion in heterodyne image rejection [24].…”

Section: Comentioning

confidence: 99%

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Filter-Free Photonic Image-Rejection Down-Conversion for Distributed Antenna Applications

et al. 2021

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Photonics-assisted frequency conversion based on cascaded modulators is an effective way to satisfy the requirements of distributed antenna array applications. A filter-free photonic image-rejection down-converter with immunity to dispersion-induced power fading is proposed and demonstrated. The radio frequency (RF) signal from the distributed antenna unit is injected into a dual-drive Mach-Zehnder modulator (DDMZM) through an electrical 90° hybrid coupler (HC), and a single-sideband (SSB) signal is realized. It is then transmitted to the center office by an optical fiber link. At the center office, the modulated RF signal is injected into a dual-polarization dual-parallel MZM (DP-DPMZM) after a polarization controller (PC). Afterwards, an LO signal remodulates it through the Y-DPMZM, and carrier-suppressed SSB modulation is fulfilled via another electrical 90° HC. After the power splitting, quadrature I and Q IF signals can be obtained by a photonics-based continuously adjustable phase shifter. Through a combination of the I/Q IF signals with a low-frequency electrical 90° HC, a photonics image-rejection down-converter based on phase cancellation is realized. Moreover, no optical filter is required; thus, the image-rejection down-converter can work with a large bandwidth. The proposed filter-free photonic image-rejection down-converter is theoretically analyzed and experimentally verified.

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Section: Comentioning

confidence: 99%

Section: Comentioning

confidence: 99%

Filter-Free Photonic Image-Rejection Down-Conversion for Distributed Antenna Applications

et al. 2021

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“…As communication and radar detection technology develops, the bandwidth of the radio frequency (RF) signal is increasing rapidly. The broadband multi-service access and communication navigation identification in the civilian field [1,2], and the frequency-agile radar and electronic warfare systems in the military field, have all put forward the need to manipulate wideband RF signals with the bandwidth of several GHz or even dozens of GHz in the future [3]. Therefore, RF receivers with large instantaneous bandwidth, high resolution, and large dynamic range are required to process multi-band signals arriving at the same time [4][5][6][7].…”

Section: Introductionmentioning

confidence: 99%

An Ultra-Wideband Microwave Photonic Channelizer Based on Coherent Optical Frequency Combs and Image-Reject Down-Conversion

et al. 2020

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Radio frequency (RF) channelization receiver is one of the most effective methods for processing ultra-wideband RF signals. In this paper, an ultra-wideband microwave photonic channelizer based on coherent optical frequency combs (OFCs) and image-reject down-converter is proposed and demonstrated. The OFCs used in the system are generated by two dual parallel Mach-Zehnder modulators (DPMZM), and the free spectrum range (FSR) is flexibly adjustable. The image-reject down-converter can not only effectively achieve image separation but also suppress the seven-order distortion and DC offset using balanced detection. A K-and Ka-band RF signal covering the frequency band from 25 to 30 GHz is sliced into 5 sub-channels with 1-GHz bandwidth, two-tone signals with frequencies of 27.5 and 27.51GHz are used to measure the spurious free dynamic range (SFDR) which is 116.8 dB•Hz 2∕3 , the image-rejection is over 66.4 dB, and the error vector magnitude (EVM) is 4.2%. INDEX TERMS Microwave photonics, channelization, optical frequency comb (OFC), image rejection. balanced detection.

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“…However, this method can only perform intensity detection and cannot extract the RF phase information. In the second category, two optical frequency combs (OFCs) are used as the optical carrier and the optical local oscillator (LO) [15,16], respectively. The RF signal is modulated onto the carrier OFC, and then filtered into multiple channels by the F-P cavity filter.…”

Section: Introductionmentioning

confidence: 99%

An Ultra-Wideband Microwave Photonic Channelized Receiver with Zero-IF Architecture

et al. 2019

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A scheme for realizing a zero-intermediate frequency (IF) channelized receiver using a dual-polarization quadrature phase-shift keying (DP-QPSK) modulator and a narrow-band optical filter is proposed. The channelized system only requires one optical frequency comb to achieve zero-IF multi-channel reception of wideband signals, and the spacing of the optical frequency comb only needs to be equal to the sub-channel width, which is very easy to implement. It is found that using photonic IQ demodulation and balanced detection and reception technology can not only eliminate many disadvantages of the traditional zero-IF receiver, including local oscillator (LO) leakage, direct current (DC) offset, even-order distortion, and in-phase/quadrature (I/Q) imbalance, but also reduce the bandwidth and sample rate of the analog-to-digital converter (ADC). It is theoretically proven that the radio frequency (RF) signal with a bandwidth of 3 GHz can be divided into five sub-channels with a bandwidth of 600 MHz and finally demodulated to I/Q basebands, which are also verified with simulation.

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Electro-optic millimeter-wave harmonic downconversion and vector demodulation using cascaded phase modulation and optical filtering

Cited by 50 publications

References 16 publications

Filter-Free Photonic Image-Rejection Down-Conversion for Distributed Antenna Applications

Filter-Free Photonic Image-Rejection Down-Conversion for Distributed Antenna Applications

An Ultra-Wideband Microwave Photonic Channelizer Based on Coherent Optical Frequency Combs and Image-Reject Down-Conversion

An Ultra-Wideband Microwave Photonic Channelized Receiver with Zero-IF Architecture

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