Title :
A fiber distribution system for microcellular radio
Author :
Wu, Jingshown ; Wu, Jiunn-Shyen ; Tsao, Hen-W
Author_Institution :
Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei, Taiwan
Abstract :
A new fiber distribution system for mobile phone networks is proposed. In the system, at the base station, a single high power low relative intensity noise Nd:YAG laser is employed and shared by many microcells. At the radio port, an optical coupler is used to split the optical power into two ways: one for the downstream signal detection and the other remodulated by an amplitude modulator for the upstream signal. With proper frequency allocation, some intermodulation distortion can be prevented from falling into the band of the upstream signal. Theoretical analysis shows that this system, in conjunction with thermal noise suppression and modulator linearization techniques, may increase the channel capacity and enhance frequency reuse significantly.<>
Keywords :
cellular radio; channel capacity; frequency allocation; intermodulation; laser beam applications; linearisation techniques; mobile radio systems; optical links; personal communication networks; radio stations; thermal noise; YAG:Nd; YAl5O12:Nd; amplitude modulator; base station; channel capacity; downstream signal detection; enhance frequency reuse; fiber distribution system; intermodulation distortion; microcells; microcellular radio; mobile phone networks; modulator linearization techniques; optical coupler; optical power splitting; proper frequency allocation; radio port; remodulated; single high power low relative intensity noise Nd:YAG laser; thermal noise suppression; upstream signal; Base stations; Chirp modulation; Fiber lasers; Laser noise; Mobile handsets; Optical distortion; Optical fiber couplers; Optical modulation; Optical noise; Power lasers;
Journal_Title :
Photonics Technology Letters, IEEE
