A scheme of full-duplex radio over fiber link model
-
摘要: 提出了一个新的全双工光载无线通信链路模型。方案的下行链路采用两个马赫曾德尔调制器级联以产生六倍频毫米波;采用单边带调制,有效防止了码元走离现象,提高了传输距离;上行链路复用了下行链路中的一阶光边带以作为上行基带信号的载波,从而无需在基站中额外配置激光源;采用延时零拍法解调,减少了对毫米波本地振荡器的需求,降低了系统的成本。仿真结果表明,所提出的全双工模型中,仅用10 GHz频率的调制信号就能产生60 GHz的毫米波,大大降低了调制信号频率,且下行链路传输距离可达250 km,而上行链路传输距离大于300 km。Abstract: A new full-duplex radio over fiber link model was proposed in this paper. For the down link, two mach-zehnders modulator cascaded were employed to generate sextupling-frequency millimeter wave; the single side-band modulation was used to overcome the walk-off effect, thereby the transmission distance was effectively improved. In the meanwhile, the first order sideband was employed as the carrier of uplink baseband signal and thus the requirement of additional laser source was eliminated. Furthermore, self-homodyning demodulation method was adopted to avoid the need of local oscillator, thereby the cost of system was reduced. Numerical result shows that the proposed full-deplex model can produce 60 GHz millimeter wave by only using 10 GHz modulated signal. The transmission distance for down link can reach 250 km and that for the up link is more than 300 km.
-
Key words:
- full-duplex link model /
- sextupling-frequency /
- cascaded /
- self-homodyning
-
[1] Li Tao, Rong Jian, Zhong Xiaochun. OFDM-ROF system simulation based on OptiSystem[J]. Infrared and Laser Engineering, 2011, 40(6): 1154-1159. (in Chinese) 李涛, 荣建, 钟晓春. 采用OptiSystem的OFDM-ROF系统仿真[J]. 红外与激光工程, 2011, 40(6): 1154-1159. [2] [3] [4] Zhu Zihang,Zhao Shanghong, Yao Zhoushi, et al. Analysis of influence of phase shift drift and splitting ratio on octupling-frequency optical millimeterwave generation and distribution[J]. Infrared and Laser Engineering, 2012, 41(8): 2112-2118. (in Chinese) 朱子行, 赵尚弘, 幺周石, 等. 相位偏移和分束比对八倍频光毫米波产生及传输的影响分析[J]. 红外与激光工程, 2012, 41(8): 2112-2118. [5] Li Jing, Ning Tigang, Pei Li, et al. 60 GHz millimeter-wave generator based on a frequency-quadrupling feed-forward modulation technique[J]. Optics Letters, 2010, 35(21): 3619-3621. [6] [7] Li Jing, Ning Tigang, Pei Li, et al. Scheme for a high-capacity 60 GHz radio-over-fiber transmission system[J]. Journal of Optical Communications and Networking, 2009, 1(4): 324-330. [8] [9] Li Chungyi, Su Hengsheng, Chang Chinghung, et al. Generation and transmission of BB/MW/MMW signals by cascading PM and MZM[J]. Journal of Lightwave Technology, 2012, 30(3): 298-303. [10] [11] Mohmoud Mohamed, Zhang Xiupu, Bouchaib Hraimel, et al. Frequency sixupler for millimeter-wave over fiber systems[J]. Optics Express, 2008, 16(14): 10141-10151. [12] [13] Qin Yi, Sun Junqiang. Frequency sextupling technique using two cascaded dual-electrode Mach-Zehnder modulators interleaved with Gaussian optical band-pass filter[J]. Optics Communications, 2012, 285(12): 2911-2916. [14] [15] Li Wangzhe, Yao Jianping. Microwave generation based on optical domain microwave frequency octupling[J]. IEEE Photonics Technology Letters, 2010, 22(1): 24-26. [16] [17] Ma J, Yu J, Yu C, et al. Fiber dispersion influence on transmission of the optical millimeter-waves generated using LN-MZM intensity modulation[J]. Lightwave Technology, 2007, 25(11): 3244-3256. [18] [19] [20] Yu J, Huang M F, Jia Z, et al. A novel scheme to generate single-sideband millimeter-wave signals by using low-frequency local oscillator signal[J]. Photonics Technology Letters, 2008, 20(7): 478-480. [21] Ma J, Yu J, Xin X, et al. The transmission performance of the single sideband optical millimeter-wave with BPSK signal in the duplex radio-over-fiber link[J]. Optics Communications, 2008, 281(19): 4876-4881. [22] [23] Ji H C, Kim H, Chung Y C. Full-duplex radio-over-fiber system using phase-modulated downlink and intensity-modulated uplink[J]. Photonics Technology Letters, 2009, 21(1): 9-11. [24] [25] [26] Ma J, Yu J, Xin X, et al. A novel scheme to implement duplex 60-GHz radio-over-fiber link with 20-GHz double-sideband optical millimeter-wave transmitted along the fiber[J]. Optical Fiber Technology, 2009, 15(2): 125-130. [27] Ma Jianxin, Zhan Yu, Zhou Min, et al. Full-duplex radio over fiber with a centralized optical source for a 6 GHz millimeter-wave system with a 10 Gb/s 16-QAM downstream signal based on frequency quadrupling[J]. Journal of Optical Communications and Networking, 2012, 4(7): 557-564. [28] [29] [30] Islam A H M R, Bakaul M, Nirmalathas A, et al. Millimeter-wave radio-over-Fiber system based on heterodyned unlocked light sources and self-homodyned RF receiver[J]. Photonics Technology Letters, 2011, 23(8): 459-461. [31] Islam A H M, Bakaul M, Nirmalathas A, et al. Simplification of millimeter-wave radio-over-fiber system employing heterodyning of uncorrelated optical carriers and self-homodyning of RF signal at the receiver[J]. Optics Express, 2012, 20(5): 5707-5724. -
点击查看大图
计量
- 文章访问数: 492
- HTML全文浏览量: 100
- PDF下载量: 171
- 被引次数: 0
下载:
