Abstract

In this paper, we design a self-interference cancellation (SIC) scheme for in-band full-duplex (IBFD) radio-over-fiber (RoF) systems based on wavelength division multiplexing passive optical network (WDM-PON) architectures. By using a single dual-drive Mach-Zehnder modulator (DDMZM), over various bands up to 25 GHz, this proposed SIC system can simultaneously cancel the in-band downlink (DL) self-interference and modulate the recovered uplink (UL) radio frequency (RF) signal. OFDM-RF signals are used to study the cancellation performances of optical SIC system for the first time. Experimental results show more than 32-dB cancellation depth over 250-MHz bandwidth within 1-GHz RF band, as well as 300-MHz within 2.4-GHz and 400-MHz within 5-GHz band. As for 2.4-GHz RF band, 390.63-Mbps 16-QAM OFDM UL signal buried by strong in-band DL OFDM signal is well recovered. For broadband applications, more than 27-dB cancellation depth is achieved over 10 MHz~25 GHz wideband, so that up to 25 GHz RF band can be expanded for this IBFD WDM-RoF system.

© 2015 Optical Society of America

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References

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  1. D. Wake, A. Nkansah, and N. J. Gomes, “Radio over fiber link design for next generation wireless systems,” J. Lightwave Technol. 28(16), 2456–2464 (2010).
    [Crossref]
  2. Z. Cao, J. Yu, H. Zhou, W. Wang, M. Xia, J. Wang, and L. Chen, “WDM-RoF-PON architecture for flexible wireless and wire-line layout,” J. Opt. Commun. Netw. 2(2), 117–121 (2010).
    [Crossref]
  3. A. T. Nguyen, Z. Cao, L. K. Efebvre, and L. Rusch, “Full-duplex WiFi analog transmission in RSOA-based radio-over-fiber system with wavelength-reuse,” in Proceedings of European Conference and Exhibition on Optical Communication (ECOC 2014), Paper P.7.21.
  4. A. Sabharwal, P. Schniter, D. Guo, D. W. Bliss, S. Rangarajan, and R. Wichman, “In-band full-duplex wireless: challenges and opportunities,” IEEE J. Sel. Areas Comm. 32(9), 1637–1652 (2014).
    [Crossref]
  5. B. Debaillie, B. van Liempd, B. Hershberg, J. Craninckx, K. Rikkinen, D. J. van den Broek, E. A. M. Klumperink, and B. Nauta, “In-band full-duplex transceiver technology for 5G mobile networks,” in Proceedings of IEEE European Solid-State Circuits Conference (ESSCIRC, 2015), 84–87.
    [Crossref]
  6. P. A. Gamage, A. Nirmalathas, C. Lim, D. Novak, and R. Waterhouse, “Design and analysis of digitized RF-over-fiber links,” J. Lightwave Technol. 27(12), 2052–2061 (2009).
    [Crossref]
  7. P. Dat, A. Kanno, N. Yamamoto, and T. Kawanishi, “Full-Duplex Transmission of LTE-A Carrier Aggregation Signal over a Bidirectional Seamless Fiber-Millimeter-Wave System,” J. Lightwave Technol. (to be published).
  8. H. Kim, J. H. Cho, S. Kim, K. U. Song, H. Lee, J. Lee, B. Kim, Y. Oh, J. Lee, and S. Hwang, “Radio-over-fiber system for TDD-based OFDMA wireless communication systems,” J. Lightwave Technol. 25(11), 3419–3427 (2007).
    [Crossref]
  9. D. Wake, A. Nkansah, N. J. Gomes, G. De Valicourt, R. Brenot, M. Violas, Z. Liu, F. Ferreira, and S. Pato, “A comparison of radio over fiber link types for the support of wideband radio channels,” J. Lightwave Technol. 28(16), 2416–2422 (2010).
    [Crossref]
  10. S. Gollakota and D. Katabi, “Zigzag decoding: combating hidden terminals in wireless networks”, in Proceedings of Annual International Conference on Mobile Computing and Networking (ACM, 2008), 38(4), 159–170.
    [Crossref]
  11. M. Jain, J. Choi, T. M. Kim, D. Bharadia, S. Seth, K. Srinivasan, P. Levis, S. Katti, and P. Sinha, “Practical, real-time, full duplex wireless,” in Proceedings of Annual International Conference on Mobile Computing and Networking (ACM, 2011), 301–312.
  12. Q. Zhou, H. Feng, G. Scott, and M. P. Fok, “Wideband co-site interference cancellation based on hybrid electrical and optical techniques,” Opt. Lett. 39(22), 6537–6540 (2014).
    [Crossref] [PubMed]
  13. J. Suarez, K. Kravtsov, and P. R. Prucnal, “Incoherent method of optical interference cancellation for radio-frequency communications,” IEEE J. Quantum Electron. 45(4), 402–408 (2009).
    [Crossref]
  14. M. P. Chang, M. Fok, A. Hofmaier, and P. R. Prucnal, “Optical analog self-interference cancellation using electro-absorption modulators,” IEEE Microw. Wirel. Compon. Lett. 23(2), 99–101 (2013).
    [Crossref]
  15. E. Ackerman, “Broad-band linearization of a Mach-Zehnder electrooptic modulator,” IEEE Trans. Microw. Theory Tech. 47(12), 2271–2279 (1999).
    [Crossref]
  16. B. J. Kim and H. G. Ryu, “Self-Interference Cancellation using Mach-Zehnder Modulator for Full-Duplex Communication,” in Proceedings of IEEE International Conference on Information and Communication Technology Convergence (ICTC, 2014), 858–863.
    [Crossref]
  17. J. Suarez, K. Kravtsov, and P. R. Prucnal, “Methods of feedback control for adaptive counter-phase optical interference cancellation,” IEEE Trans. Instrum. Meas. 60(2), 598–607 (2011).
    [Crossref]
  18. 3GPP, 3GPP TS 36.104 version 11.9.0 Release 11, 2014.
  19. M. Zhu, X. Liu, N. Chand, F. Effenberger, and G. K. Chang, “High-Capacity Mobile Fronthaul Supporting LTE-Advanced Carrier Aggregation and 8× 8 MIMO,” in Proceedings of Optical Fiber Communication Conference (OFC, 2015), M2J–3.

2014 (2)

A. Sabharwal, P. Schniter, D. Guo, D. W. Bliss, S. Rangarajan, and R. Wichman, “In-band full-duplex wireless: challenges and opportunities,” IEEE J. Sel. Areas Comm. 32(9), 1637–1652 (2014).
[Crossref]

Q. Zhou, H. Feng, G. Scott, and M. P. Fok, “Wideband co-site interference cancellation based on hybrid electrical and optical techniques,” Opt. Lett. 39(22), 6537–6540 (2014).
[Crossref] [PubMed]

2013 (1)

M. P. Chang, M. Fok, A. Hofmaier, and P. R. Prucnal, “Optical analog self-interference cancellation using electro-absorption modulators,” IEEE Microw. Wirel. Compon. Lett. 23(2), 99–101 (2013).
[Crossref]

2011 (1)

J. Suarez, K. Kravtsov, and P. R. Prucnal, “Methods of feedback control for adaptive counter-phase optical interference cancellation,” IEEE Trans. Instrum. Meas. 60(2), 598–607 (2011).
[Crossref]

2010 (3)

2009 (2)

J. Suarez, K. Kravtsov, and P. R. Prucnal, “Incoherent method of optical interference cancellation for radio-frequency communications,” IEEE J. Quantum Electron. 45(4), 402–408 (2009).
[Crossref]

P. A. Gamage, A. Nirmalathas, C. Lim, D. Novak, and R. Waterhouse, “Design and analysis of digitized RF-over-fiber links,” J. Lightwave Technol. 27(12), 2052–2061 (2009).
[Crossref]

2007 (1)

1999 (1)

E. Ackerman, “Broad-band linearization of a Mach-Zehnder electrooptic modulator,” IEEE Trans. Microw. Theory Tech. 47(12), 2271–2279 (1999).
[Crossref]

Ackerman, E.

E. Ackerman, “Broad-band linearization of a Mach-Zehnder electrooptic modulator,” IEEE Trans. Microw. Theory Tech. 47(12), 2271–2279 (1999).
[Crossref]

Bharadia, D.

M. Jain, J. Choi, T. M. Kim, D. Bharadia, S. Seth, K. Srinivasan, P. Levis, S. Katti, and P. Sinha, “Practical, real-time, full duplex wireless,” in Proceedings of Annual International Conference on Mobile Computing and Networking (ACM, 2011), 301–312.

Bliss, D. W.

A. Sabharwal, P. Schniter, D. Guo, D. W. Bliss, S. Rangarajan, and R. Wichman, “In-band full-duplex wireless: challenges and opportunities,” IEEE J. Sel. Areas Comm. 32(9), 1637–1652 (2014).
[Crossref]

Brenot, R.

Cao, Z.

Chand, N.

M. Zhu, X. Liu, N. Chand, F. Effenberger, and G. K. Chang, “High-Capacity Mobile Fronthaul Supporting LTE-Advanced Carrier Aggregation and 8× 8 MIMO,” in Proceedings of Optical Fiber Communication Conference (OFC, 2015), M2J–3.

Chang, G. K.

M. Zhu, X. Liu, N. Chand, F. Effenberger, and G. K. Chang, “High-Capacity Mobile Fronthaul Supporting LTE-Advanced Carrier Aggregation and 8× 8 MIMO,” in Proceedings of Optical Fiber Communication Conference (OFC, 2015), M2J–3.

Chang, M. P.

M. P. Chang, M. Fok, A. Hofmaier, and P. R. Prucnal, “Optical analog self-interference cancellation using electro-absorption modulators,” IEEE Microw. Wirel. Compon. Lett. 23(2), 99–101 (2013).
[Crossref]

Chen, L.

Cho, J. H.

Choi, J.

M. Jain, J. Choi, T. M. Kim, D. Bharadia, S. Seth, K. Srinivasan, P. Levis, S. Katti, and P. Sinha, “Practical, real-time, full duplex wireless,” in Proceedings of Annual International Conference on Mobile Computing and Networking (ACM, 2011), 301–312.

Dat, P.

P. Dat, A. Kanno, N. Yamamoto, and T. Kawanishi, “Full-Duplex Transmission of LTE-A Carrier Aggregation Signal over a Bidirectional Seamless Fiber-Millimeter-Wave System,” J. Lightwave Technol. (to be published).

De Valicourt, G.

Effenberger, F.

M. Zhu, X. Liu, N. Chand, F. Effenberger, and G. K. Chang, “High-Capacity Mobile Fronthaul Supporting LTE-Advanced Carrier Aggregation and 8× 8 MIMO,” in Proceedings of Optical Fiber Communication Conference (OFC, 2015), M2J–3.

Feng, H.

Ferreira, F.

Fok, M.

M. P. Chang, M. Fok, A. Hofmaier, and P. R. Prucnal, “Optical analog self-interference cancellation using electro-absorption modulators,” IEEE Microw. Wirel. Compon. Lett. 23(2), 99–101 (2013).
[Crossref]

Fok, M. P.

Gamage, P. A.

Gollakota, S.

S. Gollakota and D. Katabi, “Zigzag decoding: combating hidden terminals in wireless networks”, in Proceedings of Annual International Conference on Mobile Computing and Networking (ACM, 2008), 38(4), 159–170.
[Crossref]

Gomes, N. J.

Guo, D.

A. Sabharwal, P. Schniter, D. Guo, D. W. Bliss, S. Rangarajan, and R. Wichman, “In-band full-duplex wireless: challenges and opportunities,” IEEE J. Sel. Areas Comm. 32(9), 1637–1652 (2014).
[Crossref]

Hofmaier, A.

M. P. Chang, M. Fok, A. Hofmaier, and P. R. Prucnal, “Optical analog self-interference cancellation using electro-absorption modulators,” IEEE Microw. Wirel. Compon. Lett. 23(2), 99–101 (2013).
[Crossref]

Hwang, S.

Jain, M.

M. Jain, J. Choi, T. M. Kim, D. Bharadia, S. Seth, K. Srinivasan, P. Levis, S. Katti, and P. Sinha, “Practical, real-time, full duplex wireless,” in Proceedings of Annual International Conference on Mobile Computing and Networking (ACM, 2011), 301–312.

Kanno, A.

P. Dat, A. Kanno, N. Yamamoto, and T. Kawanishi, “Full-Duplex Transmission of LTE-A Carrier Aggregation Signal over a Bidirectional Seamless Fiber-Millimeter-Wave System,” J. Lightwave Technol. (to be published).

Katabi, D.

S. Gollakota and D. Katabi, “Zigzag decoding: combating hidden terminals in wireless networks”, in Proceedings of Annual International Conference on Mobile Computing and Networking (ACM, 2008), 38(4), 159–170.
[Crossref]

Katti, S.

M. Jain, J. Choi, T. M. Kim, D. Bharadia, S. Seth, K. Srinivasan, P. Levis, S. Katti, and P. Sinha, “Practical, real-time, full duplex wireless,” in Proceedings of Annual International Conference on Mobile Computing and Networking (ACM, 2011), 301–312.

Kawanishi, T.

P. Dat, A. Kanno, N. Yamamoto, and T. Kawanishi, “Full-Duplex Transmission of LTE-A Carrier Aggregation Signal over a Bidirectional Seamless Fiber-Millimeter-Wave System,” J. Lightwave Technol. (to be published).

Kim, B.

Kim, B. J.

B. J. Kim and H. G. Ryu, “Self-Interference Cancellation using Mach-Zehnder Modulator for Full-Duplex Communication,” in Proceedings of IEEE International Conference on Information and Communication Technology Convergence (ICTC, 2014), 858–863.
[Crossref]

Kim, H.

Kim, S.

Kim, T. M.

M. Jain, J. Choi, T. M. Kim, D. Bharadia, S. Seth, K. Srinivasan, P. Levis, S. Katti, and P. Sinha, “Practical, real-time, full duplex wireless,” in Proceedings of Annual International Conference on Mobile Computing and Networking (ACM, 2011), 301–312.

Kravtsov, K.

J. Suarez, K. Kravtsov, and P. R. Prucnal, “Methods of feedback control for adaptive counter-phase optical interference cancellation,” IEEE Trans. Instrum. Meas. 60(2), 598–607 (2011).
[Crossref]

J. Suarez, K. Kravtsov, and P. R. Prucnal, “Incoherent method of optical interference cancellation for radio-frequency communications,” IEEE J. Quantum Electron. 45(4), 402–408 (2009).
[Crossref]

Lee, H.

Lee, J.

Levis, P.

M. Jain, J. Choi, T. M. Kim, D. Bharadia, S. Seth, K. Srinivasan, P. Levis, S. Katti, and P. Sinha, “Practical, real-time, full duplex wireless,” in Proceedings of Annual International Conference on Mobile Computing and Networking (ACM, 2011), 301–312.

Lim, C.

Liu, X.

M. Zhu, X. Liu, N. Chand, F. Effenberger, and G. K. Chang, “High-Capacity Mobile Fronthaul Supporting LTE-Advanced Carrier Aggregation and 8× 8 MIMO,” in Proceedings of Optical Fiber Communication Conference (OFC, 2015), M2J–3.

Liu, Z.

Nirmalathas, A.

Nkansah, A.

Novak, D.

Oh, Y.

Pato, S.

Prucnal, P. R.

M. P. Chang, M. Fok, A. Hofmaier, and P. R. Prucnal, “Optical analog self-interference cancellation using electro-absorption modulators,” IEEE Microw. Wirel. Compon. Lett. 23(2), 99–101 (2013).
[Crossref]

J. Suarez, K. Kravtsov, and P. R. Prucnal, “Methods of feedback control for adaptive counter-phase optical interference cancellation,” IEEE Trans. Instrum. Meas. 60(2), 598–607 (2011).
[Crossref]

J. Suarez, K. Kravtsov, and P. R. Prucnal, “Incoherent method of optical interference cancellation for radio-frequency communications,” IEEE J. Quantum Electron. 45(4), 402–408 (2009).
[Crossref]

Rangarajan, S.

A. Sabharwal, P. Schniter, D. Guo, D. W. Bliss, S. Rangarajan, and R. Wichman, “In-band full-duplex wireless: challenges and opportunities,” IEEE J. Sel. Areas Comm. 32(9), 1637–1652 (2014).
[Crossref]

Ryu, H. G.

B. J. Kim and H. G. Ryu, “Self-Interference Cancellation using Mach-Zehnder Modulator for Full-Duplex Communication,” in Proceedings of IEEE International Conference on Information and Communication Technology Convergence (ICTC, 2014), 858–863.
[Crossref]

Sabharwal, A.

A. Sabharwal, P. Schniter, D. Guo, D. W. Bliss, S. Rangarajan, and R. Wichman, “In-band full-duplex wireless: challenges and opportunities,” IEEE J. Sel. Areas Comm. 32(9), 1637–1652 (2014).
[Crossref]

Schniter, P.

A. Sabharwal, P. Schniter, D. Guo, D. W. Bliss, S. Rangarajan, and R. Wichman, “In-band full-duplex wireless: challenges and opportunities,” IEEE J. Sel. Areas Comm. 32(9), 1637–1652 (2014).
[Crossref]

Scott, G.

Seth, S.

M. Jain, J. Choi, T. M. Kim, D. Bharadia, S. Seth, K. Srinivasan, P. Levis, S. Katti, and P. Sinha, “Practical, real-time, full duplex wireless,” in Proceedings of Annual International Conference on Mobile Computing and Networking (ACM, 2011), 301–312.

Sinha, P.

M. Jain, J. Choi, T. M. Kim, D. Bharadia, S. Seth, K. Srinivasan, P. Levis, S. Katti, and P. Sinha, “Practical, real-time, full duplex wireless,” in Proceedings of Annual International Conference on Mobile Computing and Networking (ACM, 2011), 301–312.

Song, K. U.

Srinivasan, K.

M. Jain, J. Choi, T. M. Kim, D. Bharadia, S. Seth, K. Srinivasan, P. Levis, S. Katti, and P. Sinha, “Practical, real-time, full duplex wireless,” in Proceedings of Annual International Conference on Mobile Computing and Networking (ACM, 2011), 301–312.

Suarez, J.

J. Suarez, K. Kravtsov, and P. R. Prucnal, “Methods of feedback control for adaptive counter-phase optical interference cancellation,” IEEE Trans. Instrum. Meas. 60(2), 598–607 (2011).
[Crossref]

J. Suarez, K. Kravtsov, and P. R. Prucnal, “Incoherent method of optical interference cancellation for radio-frequency communications,” IEEE J. Quantum Electron. 45(4), 402–408 (2009).
[Crossref]

Violas, M.

Wake, D.

Wang, J.

Wang, W.

Waterhouse, R.

Wichman, R.

A. Sabharwal, P. Schniter, D. Guo, D. W. Bliss, S. Rangarajan, and R. Wichman, “In-band full-duplex wireless: challenges and opportunities,” IEEE J. Sel. Areas Comm. 32(9), 1637–1652 (2014).
[Crossref]

Xia, M.

Yamamoto, N.

P. Dat, A. Kanno, N. Yamamoto, and T. Kawanishi, “Full-Duplex Transmission of LTE-A Carrier Aggregation Signal over a Bidirectional Seamless Fiber-Millimeter-Wave System,” J. Lightwave Technol. (to be published).

Yu, J.

Zhou, H.

Zhou, Q.

Zhu, M.

M. Zhu, X. Liu, N. Chand, F. Effenberger, and G. K. Chang, “High-Capacity Mobile Fronthaul Supporting LTE-Advanced Carrier Aggregation and 8× 8 MIMO,” in Proceedings of Optical Fiber Communication Conference (OFC, 2015), M2J–3.

IEEE J. Quantum Electron. (1)

J. Suarez, K. Kravtsov, and P. R. Prucnal, “Incoherent method of optical interference cancellation for radio-frequency communications,” IEEE J. Quantum Electron. 45(4), 402–408 (2009).
[Crossref]

IEEE J. Sel. Areas Comm. (1)

A. Sabharwal, P. Schniter, D. Guo, D. W. Bliss, S. Rangarajan, and R. Wichman, “In-band full-duplex wireless: challenges and opportunities,” IEEE J. Sel. Areas Comm. 32(9), 1637–1652 (2014).
[Crossref]

IEEE Microw. Wirel. Compon. Lett. (1)

M. P. Chang, M. Fok, A. Hofmaier, and P. R. Prucnal, “Optical analog self-interference cancellation using electro-absorption modulators,” IEEE Microw. Wirel. Compon. Lett. 23(2), 99–101 (2013).
[Crossref]

IEEE Trans. Instrum. Meas. (1)

J. Suarez, K. Kravtsov, and P. R. Prucnal, “Methods of feedback control for adaptive counter-phase optical interference cancellation,” IEEE Trans. Instrum. Meas. 60(2), 598–607 (2011).
[Crossref]

IEEE Trans. Microw. Theory Tech. (1)

E. Ackerman, “Broad-band linearization of a Mach-Zehnder electrooptic modulator,” IEEE Trans. Microw. Theory Tech. 47(12), 2271–2279 (1999).
[Crossref]

J. Lightwave Technol. (4)

J. Opt. Commun. Netw. (1)

Opt. Lett. (1)

Other (8)

A. T. Nguyen, Z. Cao, L. K. Efebvre, and L. Rusch, “Full-duplex WiFi analog transmission in RSOA-based radio-over-fiber system with wavelength-reuse,” in Proceedings of European Conference and Exhibition on Optical Communication (ECOC 2014), Paper P.7.21.

B. Debaillie, B. van Liempd, B. Hershberg, J. Craninckx, K. Rikkinen, D. J. van den Broek, E. A. M. Klumperink, and B. Nauta, “In-band full-duplex transceiver technology for 5G mobile networks,” in Proceedings of IEEE European Solid-State Circuits Conference (ESSCIRC, 2015), 84–87.
[Crossref]

S. Gollakota and D. Katabi, “Zigzag decoding: combating hidden terminals in wireless networks”, in Proceedings of Annual International Conference on Mobile Computing and Networking (ACM, 2008), 38(4), 159–170.
[Crossref]

M. Jain, J. Choi, T. M. Kim, D. Bharadia, S. Seth, K. Srinivasan, P. Levis, S. Katti, and P. Sinha, “Practical, real-time, full duplex wireless,” in Proceedings of Annual International Conference on Mobile Computing and Networking (ACM, 2011), 301–312.

P. Dat, A. Kanno, N. Yamamoto, and T. Kawanishi, “Full-Duplex Transmission of LTE-A Carrier Aggregation Signal over a Bidirectional Seamless Fiber-Millimeter-Wave System,” J. Lightwave Technol. (to be published).

3GPP, 3GPP TS 36.104 version 11.9.0 Release 11, 2014.

M. Zhu, X. Liu, N. Chand, F. Effenberger, and G. K. Chang, “High-Capacity Mobile Fronthaul Supporting LTE-Advanced Carrier Aggregation and 8× 8 MIMO,” in Proceedings of Optical Fiber Communication Conference (OFC, 2015), M2J–3.

B. J. Kim and H. G. Ryu, “Self-Interference Cancellation using Mach-Zehnder Modulator for Full-Duplex Communication,” in Proceedings of IEEE International Conference on Information and Communication Technology Convergence (ICTC, 2014), 858–863.
[Crossref]

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Figures (8)

Fig. 1
Fig. 1 Architecture of IBFD WDM-RoF system. Tx: transmitter; Rx: receiver; PD: photodetector; PD: power amplifier; SMF: single mode fiber; AWG: arrayed waveguide grating.
Fig. 2
Fig. 2 The proposed SIC system. τ: electrical time delay; A: electrical amplification.
Fig. 3
Fig. 3 Experimental setup. ECL: external cavity laser; PC: polarization controller; VCA: voltage-controlled amplifier; τ: electrical time delay; α: electrical attenuation; LPF: low-pass filter.
Fig. 4
Fig. 4 Cancellation depth of SIC system at (a) 1.0-GHz, (b) 2.4-GHz and (c) 5.0-GHz band.
Fig. 5
Fig. 5 Spectra of received RFU without and with cancellation.
Fig. 6
Fig. 6 Constellation diagrams of UL signals before (a-c) and after (d-e) cancellation.
Fig. 7
Fig. 7 Broadband cancellation depth.
Fig. 8
Fig. 8 Eye diagrams with data rate of 10 Gbps (a) before cancellation (b) after cancellation, and 20 Gbps (c) before cancellation (d) after cancellation.

Equations (4)

Equations on this page are rendered with MathJax. Learn more.

ϕ 1 = π V π V 1 = π V π ( V 0 + V π + R F D ' + R F U ) .
ϕ 2 = π V π V 2 = π V π ( V 0 + α R F D " ( τ ) ) .
E o u t = E i n 2 ( e j ϕ 1 + e j ϕ 2 ) = E i n cos ϕ 1 ϕ 2 2 e j ϕ 1 + ϕ 2 2 = E i n cos ( V π 2 + π 2 V π R F U ) e j ϕ 1 + ϕ 2 2 .
P o u t = P i n cos 2 ( V π 2 + π 2 V π R F U ) .

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