研究目的
Developing a MMW backhaul technology for high-speed trains using DAS and RoF with optical frequency doubling to achieve large-capacity communication, addressing fiber dispersion issues.
研究成果
The proposed RoF system with optical frequency doubling effectively transmits vector modulation signals (e.g., 1.2 Gbps with 64 QAM) and supports packet communications with low PER, demonstrating viability for MMW backhaul in train systems. Future enhancements aim to increase capacity.
研究不足
The paper mentions limitations such as the need for pre-distortion to compensate for amplitude and phase changes after transmission, and the experimental throughput is limited to 1 Mbaud in packet tests due to processing constraints. Future work includes multi-carrier aggregation to increase throughput.
1：Experimental Design and Method Selection:
The experiment involves designing a RoF system with optical frequency doubling using a Mach-Zehnder Modulator (MZM) to generate doubled RF frequencies (e.g., 92 GHz from 46 GHz input) for vector signal transmission. The method includes optical two-tone generation with carrier suppression to mitigate fiber dispersion effects.
2：Sample Selection and Data Sources:
The system uses simulated or generated IQ baseband signals for modulation, transmitted over optical fiber (e.g., 40 km distance mentioned in abstract).
3：List of Experimental Equipment and Materials:
Includes Arbitrary Waveform Generator (AWG), Vector Signal Generator (VSG), Local Oscillator (LO), Mixer, Optical Source, MZM, Optical Amplifiers, Photodiode, Signal Analyzer, and antennas. Specific models and brands are listed in the products section.
4：Experimental Procedures and Operational Workflow:
Steps involve generating baseband signals with AWG, upconverting to IF and RF frequencies, modulating light with MZM, transmitting over fiber, detecting with photodiode to get doubled frequency, and analyzing signals with a signal analyzer. Packet communication tests use USRPs and GNU radio for validation.
5：Data Analysis Methods:
Analysis includes measuring constellation diagrams, magnitude error, phase error, Error Vector Magnitude (EVM), and Packet Error Rate (PER) using equipment like signal analyzers and software tools.
独家科研数据包，助您复现前沿成果，加速创新突破
获取完整内容-
Harmonic Mixer
FS-Z110
R&S
Used with signal analyzer for high-frequency measurements
暂无现货
预约到货通知
-
Arbitrary Waveform Generator
M8190A
Agilent
Generates IQ baseband signals for modulation
暂无现货
预约到货通知
-
Vector Signal Generator
SMJ100A
R&S
Generates intermediate frequency (IF) signals modulated by IQ baseband
暂无现货
预约到货通知
-
Signal Generator
E8257D
Agilent
Acts as a local oscillator (LO) to generate signals for mixing
暂无现货
预约到货通知
-
Amplifier
UA0L65VM
Microsemi
Amplifies RF signals before modulation
暂无现货
预约到货通知
-
Optical Spectrum Analyzer
AQ6370
Yokogawa
Analyzes optical spectra of transmitted signals
立即获取同款设备 -
Signal Analyzer
FSW43
R&S
Measures RF signal parameters like magnitude, phase error, and EVM
暂无现货
预约到货通知
-
Mixer
MM1-2567LS
Marki
Mixes IF and LO signals to generate RF signals
暂无现货
预约到货通知
-
RF High Pass Filter
FH4000
Marki
Filters RF signals to remove unwanted frequencies
暂无现货
预约到货通知
-
Mach-Zehnder Modulator
AZ-DV5-40-SLB65
EOSPACE
Modulates optical carrier with RF signals to generate sidebands for frequency doubling
暂无现货
预约到货通知
-
Optical Interleaver
T100-1550
Yenista
Separates odd and even optical sidebands for processing
暂无现货
预约到货通知
-
Optical Amplifier
FA-30
Pritel
Amplifies optical signals in the transmission path
暂无现货
预约到货通知
-
Optical Amplifier
FA-20
Pritel
Amplifies optical signals in the transmission path
暂无现货
预约到货通知
-
Photo Diode
XPDV4121
u2t
Detects optical signals and converts them back to electrical RF signals
暂无现货
预约到货通知
-
Universal Software Radio Peripheral
USRP
Used for packet communication tests with GNU radio software
暂无现货
预约到货通知
-
登录查看剩余13件设备及参数对照表
查看全部
