A Method to Increase the Capacity of a Millimeter Wave Radio-over-Fiber System
| Autor: | Farzan Aminian, Morad Khosravi Eghbal, Mehdi Shadaram |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Physics
Optical fiber Code division multiple access business.industry Electro-optic modulator 020206 networking & telecommunications 02 engineering and technology 01 natural sciences Multiplexing law.invention 010309 optics Wavelength Radio over fiber Optics law Wavelength-division multiplexing 0103 physical sciences Extremely high frequency 0202 electrical engineering electronic engineering information engineering business |
| Zdroj: | ICTON |
| Popis: | We propose a W-band wavelength division multiplexed (WDM)-over-optical code division multiple access (OCDMA) radio-over-fiber system operating at various frequencies within the E-band and the performance measurements are presented. The system offers an extended capacity for millimeter wave signals by incorporating optical encoding with WDM technique. The millimeter wave signal is generated in a tandem dual-electrode Mach Zehnder Modulator. Two optical tones, having a frequency difference equal to the millimeter wave frequency of choice are selected from the output spectrum of the tandem modulators. One frequency component is data-modulated and optically encoded while the other tone is kept unmodulated and uncoded. Both optical tones are then transmitted through an optical fiber to the receiver. At the receiver, two tones are heterodyned at a photodiode to generate the millimeter wave signal at the E-band. The performance of the system is measured with software simulation of three channels each carrying six users’ encoded data. The outcome of this study is depicted in bit-error-rate and eye-diagram figures. The best result is achieved for channel three with BER of 10−6 for a received power of 6.9 μW. The obtained results are analyzed for each wavelength channel. Finally, the analysis of the obtained results is presented. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|