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An RoF system using a quadrature-multiplexing technique is shown experimentally to improve the 3rd order SFDR by 2.7dB over an intrinsic optical link. As a result of orthogonality between quadrature sidebands, the system can support MIMO.
This paper presents the first demonstration of a uni-travelling carrier photodiode (UTC-PD) used as a receiver of a wirelessly transmitted quadrature phase shift keying (QPSK) signal. In this demonstration, a 1 Gbaud QPSK signal centered at 33.5 GHz was transmitted over a wireless distance of 1.4 m. At the receiver, a UTC-PD is used to down-convert the RF signal to an intermediate frequency (IF) of...
A broadband photonic RF channelizer with large in-band interference suppression is proposed and experimentally demonstrated based on dual optical frequency combs (OFCs) and photonic image-reject mixers (IRMs). A Ku-band RF signal with a bandwidth of 5 GHz is channelized into five sub-channels with 1-GHz instantaneous bandwidth. The in-band interference, which is a serious problem of conventional photonics-based...
A microwave photonic sub-harmonic mixer with a wide bandwidth, high RF-to-LO isolation and high RF/LO-to-IF isolation is presented. High isolation between the RF port and the LO port is obtained by separately applying the RF signal and the LO into two Mach Zehnder modulators, which are far apart, inside an integrated four-parallel Mach Zehnder modulator to avoid crosstalk between signal electrodes...
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