1. Wang, C.-X., Haider, F., Gao, X., You, X.-H., Yang, Y., Yuan, D., et al. (2014). Cellular architecture and key technologies for 5G wireless communication networks. IEEE Communications Magazine, 52(2), 122–130.
2. Wang, C.H., Chang, H.-Y., Wu, P.-S., Lin, K.-Y., Huang, T.-W., Wang, H., & Chen, H. (2007). A 60 GHz low power six port transceiver for gigabit software—defined transceiver applications. In: IEEE International Solid-State Circuits Conference (pp. 593–596).
3. Seman, N., Bialkowski, M.E., Ibrahim, S.Z., & Bakar, A.A. (2009). Design of an integrated correlator for application in ultra wideband six-port transceivers. In: Antennas and Propagation Society International Symposium (pp. 1–4).
4. Hakansson, P., & Gong, S. (2008). Ultra-wideband six-port transmitter and receiver pair 3.1-4.8 GHz. In: Asia-Pacific Microwave Conference (pp. 1–4).
5. Lim, H.-S., Kim, W.-K., Yo, J.-W., Park, H.-C., Byun, W.-J., & Song, M.-S. (2007). Compact sixport transceiver for time-division duplex system. IEEE Microwave and Wireless Components Letters, 17(5), 2766–2772.