Photonic generation of microwave binary modulation signals with high frequency multiplication factors

W band vector millimeter‐wave signal generation based on a new photonic frequency quadrupling without optical filter

“…Due to the increasing shortage of medium and low‐frequency radio spectrum resources and the urgent demand for high‐speed wireless broadband access, people turn their attention to the high‐frequency millimeter‐wave (mm‐wave) band with more abundant spectrum resources, which is ranging from 30 to 300 GHz 1–8 . However, due to the limited bandwidth and other electronic bottlenecks, it would meet a more difficult and challenge to generate mm‐wave signals based on traditional electrical methods 9–12 …”

“…[1][2][3][4][5][6][7][8] However, due to the limited bandwidth and other electronic bottlenecks, it would meet a more difficult and challenge to generate mm-wave signals based on traditional electrical methods. [9][10][11][12] To solve these defects, photonic-assisted mm-wave generation schemes using external modulator and frequency multiplication technology are proposed. [13][14][15][16] However, for some cases, such as signals modulating quadrature phase-shift keying (QPSK), m-order quadrature amplitude modulation, or other higher-order vector data, frequency multiplication will synchronously bring about the same multiplicative factor for phase after square law detection in a photodetector (PD), which will cause the phase distortion.…”

A Continuously Tunable and Filter-Less QPSK Modulated Millimeter-Wave Signal Generation with Frequency Quadrupling Just Based on an MZM

“…It is the main carrier in 5G and the next generation mobile communication network. Today, with the increasing shortage of spectrum resources, it has attracted more and more attention of scientists and scholars [11][12][13][14][15][16][17][18][19]. However, due to the limited bandwidth and other electronic bottlenecks, it would be more challenging to generate millimeter wave signals based on traditional methods [20][21][22][23].…”

Photonic Generation of Multiform Microwave Frequency Shift Keying Signal

“…These microwave FSK signals usually can be classified into two forms. One is that the subcarriers of the microwave FSK signal have a fixed multiple relationship [5]- [7], and the other is that the subcarriers can be tuned flexibly [8]- [14].…”

“…Therefore, we express the obtained signal as the microwave FSK signal with FMF of 1/2. To increase the FMF, a cascaded structure containing a dual-polarization quadrature phase shift keying (DP-QPSK) modulator and a polarization modulator (PolM) is proposed in [7]. Two double-sideband (DSB) modulated signals with orthogonal polarization states are output from DP-QPSK modulator, and then experience complementary phase modulations in the PolM driven by a binary coding signal.…”