Huang, X, Zhang, H, Zhang, JA, Guo, YJ, Song, RL, Xu, XF, Wang, CT, Lu, Z & Wu, W 2019, 'Dual pulse shaping transmission with complementary nyquist pulses', IEEE Vehicular Technology Conference, Vehicular Technology Conference, IEEE, Honolulu, HI, USA.View/Download from: Publisher's site
© 2019 IEEE. The concept of complementary Nyquist pulse is introduced in this paper. Making use of a half rate Nyquist pulse and its complementary one, a dual pulse shaping transmission scheme is proposed, which achieves full Nyquist rate transmission with only a half of the sampling rate required by conventional Nyquist pulse shaping. This is essential for realizing high-speed digital communication systems with available and affordable data conversion devices. The condition for cross-symbol interference free transmission with the proposed dual pulse shaping is proved in theory, and two classes of ideal complementary Nyquist pulses are formulated assuming raised-cosine pulse shaping. Simulation results are also presented to demonstrate the improved spectral efficiency with dual pulse shaping and compare other system performance against conventional Nyquist pulse shaping.
Zhang, H, Huang, X, Zhang, JA, Jay Guo, Y, Song, RL, Wang, CT, Wu, W, Xu, XF & Lu, Z 2019, 'A high-speed low-cost millimeter wave system with dual pulse shaping transmission and symbol rate equalization techniques', Proceedings - IEEE International Symposium on Circuits and Systems, IEEE International Symposium on Circuits and Systems, Sapporo, Japan.View/Download from: Publisher's site
© 2019 IEEE A millimeter wave system with commercially available and affordable data conversion devices is presented in this paper for achieving high-speed and low-cost wireless communications. By adopting the proposed dual pulse shaping (DPS) transmission scheme, the system can achieve full Nyquist rate transmission with only half of the sampling rate required by conventional Nyquist pulse shaping. Structures of the DPS transmitter and receiver are described and effective symbol rate equalization techniques suitable for DPS transmission are presented. Simulation results with two sets of practical dual spectral shaping pulses are also provided to compare system performance with the conventional Nyquist pulse shaping system.
Zhang, H, Huang, X, Zhang, T, Zhang, JA & Jay Guo, Y 2019, 'A 30 Gbps Low-Complexity and Real-Time Digital Modem for Wireless Communications at 0.325 THz', Proceedings - 2019 19th International Symposium on Communications and Information Technologies, ISCIT 2019, pp. 260-264.View/Download from: Publisher's site
© 2019 IEEE. A high-speed wideband terahertz (THz) communication system with low-complexity and real-time digital signal processing (DSP) is presented in this paper. The architectures of baseband platform, intermediate frequency (IF) module and radio frequency (RF) frontend are described. For real-time DSP implementation with affordable field programmable gate array (FPGA) device, some effective strategies are discussed to reduce resource usage and ensure that the clock constraints are met. Adopting these strategies, all physical layer DSP modules are implemented in two FPGAs with more than 300 MHz system clock. The experimental test results using the developed real-time digital modem prototype demonstrate the superb performance for THz wireless communications.
Zhang, H, Huang, X & Guo, YJ 2018, 'Low-Complexity Digital Modem Implementation for High-Speed Point-To-Point Wireless Communications', ISCIT 2018 - 18th International Symposium on Communication and Information Technology, International Symposium on Communications and Information Technologies, IEEE, Bangkok, Thailand, pp. 171-175.View/Download from: Publisher's site
© 2018 IEEE. A low-complexity digital modem is presented in this paper for achieving high-speed and wideband point-To-point (P2P) wireless communications. By combining multiple functionalities into the transmitter and receiver filters, the signal processing complexity in the digital baseband can be significantly reduced. The structures and the implementation using field programmable gate array (FPGA) for the transmitter and receiver filters are described in details. Pre-equalization for reducing the impact of practical channel frequency response can be easily incorporated into the transmitter filter structure. The experimental test results using a 20 Gigabits per second (Gbps) digital modem prototype demonstrate the satisfactory performance with low FPGA resource usage.