MHP 펄스를 이용하는 PO-THMA UWB 시스템의 성능분석
Performance Analysis of PO-THMA UWB System using MHP Pulses
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초록
본 논문은 각 펄스 차수 간에 직교하는 특성을 가지는 MHP 펄스를 이용하여 다중 접속하는 펄스차수-시간도약 다중접속(PO-THMA) UWB 시스템을 제안하고 시스템의 성능을 분석하였다. 제안하는 다중접속방식은 각 펄스 차수 간에 직교하는 성질을 가지는 MHP 펄스와 기존의 시간도약 코드를 이용한 2차원 다중접속코드를 사용하여 시스템의 성능을 크게 향상시켰다. 제안하는 다중접속방식을 사용하는 UWB 시스템의 성능을 구하기 위해 MHP 펄스의 상관함수의 일반식을 구하고, 다중접속 환경에서 펄스간의 간섭을 분석하여 제안하는 다중접속 방식이 기존의 다중접속 방식과 비교하여 동일한 조건에서 비트오류확률을 향상시키거나 데이터 전송률을 높일 수 있음을 보인다. 제안하는 다중접속 방식은 고속의 데이터 전송이 요구되는 근거리 무선통신 분야에서 사용될 것으로 예상되며, 또한 저 전력, 소형으로 구현이 가능하므로 저 전력 위치인식 분야나 센서 네트워크 분야 등에서 활용되어질 것으로 기대된다.
Abstract
In this paper, we proposed a PO-THMA(pulse order-time hopping multiple access) scheme in UWB(ultra-wide band) system. The proposed PO-THMA UWB system using two-dimensional code combines MHP(modified Hermite polynomial) pulse order and time hopping code. The MHP pulses have a mutually orthogonal property between different order and that property makes simultaneous transmission at the same time slot regardless of collision in the THMA UWB system. We derive the general form of correlation function for MHP pulses and multiple access interference and analyze BER of the scheme over AWGN(additive white Gaussian noise) channel. Theoretical analysis and simulation results show that proposed PO-THMA UWB system increases transmission capacity or has better BER(bit error rate) than conventional THMA UWB system. The proposed PO-THMA UWB system is expected to be utilized in the high data rate wireless communication system with low power and low complexity. With these benefits, the studied PO-THMA UWB system can be used in low power sensor networks and short range wireless communication applications with high transmission rate.
참고문헌 (20)
- Moe Z. Win, "Impulse radio: How it works", IEEE comm. letter, 2, pp.36~38 (1998)
- G. Durisi, "Performance evaluation and comparison of different modulation schemes for UWB multi-access systems", Proc. IEEE Int. Conf. Comm, pp.2187~2191 (2003)
- M. A. Win, "Ultra-wide bandwidth time-hopping spread-spectrum impulse radio for wireless multiple-access communications", IEEE Trans. Commun, 48(4), pp.679~691 (2000)
- F. Ramirez-Mireles, "System performance analysis of impulse radio modulation", IEEE RAWCON, pp.67~70 (1998)
- J. Zhang, "Performance of ultra-wideband correlator receiver using Gaussian mono -cycles", IEEE Int. Conf. Communications, pp.2192~2196 (2003)
- F. Ramirez-Mireles, "Multiple-access with time hopping and block waveform PPM modulation", Proc. IEEE International Conference on Communications (ICC '98), 2, pp.775~779 (1998)
- M. Ghavami, "Hermite function based Orthogonal Pulse for UWB Communications", Proc. Wireless Personal Multimedia Conference, pp.437~440 (2001)
- L. B. Michael, "Multiple pulse generator for ultra-wideband communication using Hermite polynomial based orthogonal pulses", Proc. 2002 IEEE Conf. on Ultra Wideband Systems and Technologies (2002)
- L. E. Miller, "Autocorrelation functions for Hermite polynomial ultra-wideband pulses", IEE Electronics Letters, 39(11), pp.870~871 (2003)
- H. Zhang, "Biorthogonal pulse position modulation for time hopping multiple-access UWB communications", IEEE Trans. Wireless Commun, 4(3), pp.1154~1162 (2005)
- G. Durisi, "On the validity of Gaussian approximation to characterize the multiuser capacity of UWB TH PPM", Proc. IEEE Conf. Ultra Wideband Systems and Technology, pp.157~161 (2002)
- Ramirez Mireles, Fernando, "Performance of equi-correlated M-ary UWB-FSK signals in multipath", Latin America Transactions, IEEE (Revista IEEE America Latina), 11(3), pp.902~906 (2013)
- M. Pausini, "Analysis and comparison of autocorrelation receivers for ir-uwb signals based on differential detection", Proc. of the IEEE Int. Conf. Acoust., Speech, Signal Processing, pp.513~516 (2004)
- P. Runkle, "DS-CDMA: the modulation technology of choice for UWB communications, in Proc", IEEE Conf. Ultra Wideband Syst. Technol, pp.364~368 (2003)
- Bo Hu, "Exact bit error rate analysis of TH-PPM UWB systems in the presence of multiple-access interference", IEEE Communications Letters, 7, pp.572~574 (2003)
- G. Durisi, "Performance evaluation and comparison of different modulation schemes for UWB multi-access systems", Proc. IEEE Int. Conf. Comm., pp.2187~2191 (2003)
- B. Hu, "Accurate evaluation of multiple access performance in TH-PPM and TH-BPSK UWB systems", IEEE Trans. Commun, 52, pp.1758~1766 (2004)
- Majhi, Sudhan, "Power spectral analysis of orthogonal pulse-based th-uwb signals", Vehicular Technology Conference (VTC 2010-Spring), 2010 IEEE 71st (2010), IEEE
- M. G. Di Benedetto, "Understanding ultra wideband radio fundamentals" (2004), Prentice Hall
- J. G. Proakis, "Digital communication" (2000), McGraw-Hill Int