Abstract

An efficient multi-channel hybrid fiber-radio scheme for both down and up-link paths is demonstrated based on digitized RF-over-fiber technique, where the frequency translation stages are implemented using a single analog-to-digital converter (ADC) and digital-to-analog converter (DAC) instead of mixers and local oscillators. The simultaneous transmission of GSM, UMTS and WiMAX services is demonstrated with error-free reception. With a minimum sampling rate of 50 MHz and an overall optical data rate of 400 Mb/s, all the three wireless services can be successfully recovered in a full-duplex transmission. In the downlink direction, the performance is dependent on the amount of amplification required for the wireless signal at the desired carrier frequency. The amount of amplification on the other hand is dependent on the location of the wireless signal within the Nyquist zone which increases significantly with the order of the Nyquist zone. In the uplink direction, the performance is limited by inter-channel interference as a result of spectra aliasing of the regenerated IF signals which limits the signal-to-noise-ratio. With proper system design that optimizes downlink amplification and minimizes inter-channel interference, simultaneous multi-service transmission using digitized RF-over-fiber technique is able to improve spectral efficiency and minimize hardware count.

© 2011 IEEE

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References

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  1. A. Nirmalathas, P. A. Gamage, C. Lim, D. Novak, R. Waterhouse, "Digitized radio-over-fiber technologies for converged optical wireless access network," Journal of Lightwave Technology 28, 2366-2375 (2010).
  2. H. Chettat, L. M. Simohamed, Y. Bouslimani, H. Hamam, "RoF networks: A comprehensive study," 3rd International Symposium on Wireless Pervasive Computing (2008) pp. 495-498.
  3. R. E. Schuh, D. Wake, B. Verri, M. Mateescu, "Hybrid fibre radio access: A network operators approach and requirements," Proc. 10th Microcoll Conference (1999) pp. 211-214.
  4. A. Kaszubowska, P. Anandarajah, L. P. Barry, "Improved performance of a hybrid radio/fiber system using a directly modulated laser transmitter with external injection," IEEE Photonics Technology Letters 14, (2002).
  5. A. Nirmalathas, P. A. Gamage, C. Lim, D. Novak, R. B. Waterhouse, Y. Yang, "Digitized RF over fiber transport," Microwave Magazine 10, 75-81 (2009).
  6. Y. Yang, C. Lim, A. Nirmalathas, "Multi-channel digitized RF-over-fiber transmission based on bandpass sampling and FPGA," Journal of Lightwave Technology accepted for publication by.
  7. R. G. Vaughan, N. L. Scott, D. R. White, "The theory of bandpass sampling," IEEE Trans. Signal Processing 39, 1973-1984 (1991).
  8. N. Wong, T.-S. Ng, "An efficient algorithm for downconverting multiple bandpass signals using bandpass sampling," IEEE ICC (2001) pp. 910-914.
  9. A. I. Zayed, Advances in Shannon's Sampling Theory (CRC Press, 1993).
  10. Y.-R. Sun, S. Signell, "Effects of noise and jitter on algorithms for bandpass sampling in radio receivers," ISCAS'04 (2004) pp. 761-764.
  11. C.-H. Tseng, S.-C. Chou, "Direct downconversion of multiband RF signals using bandpass sampling," IEEE Transaction on wWireless Communications 5, (2006).
  12. P. S. R. Diniz, Digital Signal Processing: System Analysis and Design (Cambridge University Press, 2010).

2010 (1)

A. Nirmalathas, P. A. Gamage, C. Lim, D. Novak, R. Waterhouse, "Digitized radio-over-fiber technologies for converged optical wireless access network," Journal of Lightwave Technology 28, 2366-2375 (2010).

2009 (1)

A. Nirmalathas, P. A. Gamage, C. Lim, D. Novak, R. B. Waterhouse, Y. Yang, "Digitized RF over fiber transport," Microwave Magazine 10, 75-81 (2009).

2006 (1)

C.-H. Tseng, S.-C. Chou, "Direct downconversion of multiband RF signals using bandpass sampling," IEEE Transaction on wWireless Communications 5, (2006).

2002 (1)

A. Kaszubowska, P. Anandarajah, L. P. Barry, "Improved performance of a hybrid radio/fiber system using a directly modulated laser transmitter with external injection," IEEE Photonics Technology Letters 14, (2002).

1991 (1)

R. G. Vaughan, N. L. Scott, D. R. White, "The theory of bandpass sampling," IEEE Trans. Signal Processing 39, 1973-1984 (1991).

IEEE Photonics Technology Letters (1)

A. Kaszubowska, P. Anandarajah, L. P. Barry, "Improved performance of a hybrid radio/fiber system using a directly modulated laser transmitter with external injection," IEEE Photonics Technology Letters 14, (2002).

IEEE Trans. Signal Processing (1)

R. G. Vaughan, N. L. Scott, D. R. White, "The theory of bandpass sampling," IEEE Trans. Signal Processing 39, 1973-1984 (1991).

IEEE Transaction on wWireless Communications (1)

C.-H. Tseng, S.-C. Chou, "Direct downconversion of multiband RF signals using bandpass sampling," IEEE Transaction on wWireless Communications 5, (2006).

Journal of Lightwave Technology (2)

Y. Yang, C. Lim, A. Nirmalathas, "Multi-channel digitized RF-over-fiber transmission based on bandpass sampling and FPGA," Journal of Lightwave Technology accepted for publication by.

A. Nirmalathas, P. A. Gamage, C. Lim, D. Novak, R. Waterhouse, "Digitized radio-over-fiber technologies for converged optical wireless access network," Journal of Lightwave Technology 28, 2366-2375 (2010).

Microwave Magazine (1)

A. Nirmalathas, P. A. Gamage, C. Lim, D. Novak, R. B. Waterhouse, Y. Yang, "Digitized RF over fiber transport," Microwave Magazine 10, 75-81 (2009).

Other (6)

H. Chettat, L. M. Simohamed, Y. Bouslimani, H. Hamam, "RoF networks: A comprehensive study," 3rd International Symposium on Wireless Pervasive Computing (2008) pp. 495-498.

R. E. Schuh, D. Wake, B. Verri, M. Mateescu, "Hybrid fibre radio access: A network operators approach and requirements," Proc. 10th Microcoll Conference (1999) pp. 211-214.

N. Wong, T.-S. Ng, "An efficient algorithm for downconverting multiple bandpass signals using bandpass sampling," IEEE ICC (2001) pp. 910-914.

A. I. Zayed, Advances in Shannon's Sampling Theory (CRC Press, 1993).

Y.-R. Sun, S. Signell, "Effects of noise and jitter on algorithms for bandpass sampling in radio receivers," ISCAS'04 (2004) pp. 761-764.

P. S. R. Diniz, Digital Signal Processing: System Analysis and Design (Cambridge University Press, 2010).

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