Performance of Time Hopping Impulse Radio in Ultrawideband Propagation Channels: Implications of UWB and Diversity Order Selection

• Autorzy: Khaqan, A. , Gulfam, S. M. , Riaz, L. , Yasin, A. , Ahmed, A. , Jamil, M. , Ali, B. , Ali, H. , Sharief, H. , Riaz, R. A.

Warianty tytułu

PL

Działanie techniki Time Hopping Impulse Radio w komunikacji Ultra Wide-Band – zastosowanie UWB oraz doboru stopnia różnorodności

• Języki publikacji: EN

Abstrakty

EN

In this treatise, we quantify the effects of the UltraWideBand (UWB) on Time Hopping (TH) Impulse Radio (IR) operating in UWB propagation channels environment in terms of bandwidth utilization through diversity order selection. We select L strongest MultiPath Components (MPC) from Nr resolvable MPCs using Maximal Ratio Combining (MRC) in order to achieve maximum performance gain in single and full load scenarios. Three classical detectors have being used for analysis purposes named Correlation (Corr), Zero Forcing Detector (ZFD) and Minimum Mean Square Error (MMSE). Our results suggest that the diversity order L of 20 achieves maximum gain of 18dB and 12dB in single and full load Nu of 63 users scenarios, having spreading factor Ns of 63 over no diversity configuration. Hence, MPCs with delays greater than the TH chip time Tc are resolved by synchronization with the initial path of the received signal gives maximum performance gain.

PL

W artykule przedstawiono wyniki analizy dotyczącej działania techniki Time Hopping Impulse Radio, zastosowanej w komunikacji Ultra WideBand, pod kątem stopnia wykorzystania dostępnej przepustowości. W analizie zastosowano trzy typy detektorów: Corr, ZFD, MMSE. Wyniki badan wskazują, że gdy komponenty wielościeżkowe o opóźnieniach większych niż okres Time Hopping są synchronizowane z początkiem odbieranego sygnału, osiągana jest maksymalna efektywność działania.

Słowa kluczowe

PL

UWB; stopień różnorodności; time hopping; impulse radio

EN

UWB; diversity order; time hopping; impulse radio

• Czasopismo: Przegląd Elektrotechniczny
• Rocznik: 2013
• Tom: R. 89, nr 7
• Strony: 69--73
• Opis fizyczny: Bibliogr. 7 poz., rys., schem., wykr.

Twórcy

autor

Khaqan, A.

• Department of Electrical Engineering, COMSATS Institute of Information Technology, Islamabad

autor

Gulfam, S. M.

• Department of Electrical Engineering, COMSATS Institute of Information Technology, Islamabad

autor

Riaz, L.

• Department of Electrical Engineering, COMSATS Institute of Information Technology, Islamabad

autor

Yasin, A.

• Department of Electrical Engineering, COMSATS Institute of Information Technology, Islamabad

autor

Ahmed, A.

• Department of Electrical Engineering, COMSATS Institute of Information Technology, Islamabad

autor

Jamil, M.

• National University of Science and Technology, Islamabad

autor

Ali, B.

• Department of Electrical Engineering, COMSATS Institute of Information Technology, Islamabad

autor

Ali, H.

• Department of Electrical Engineering, COMSATS Institute of Information Technology, Islamabad

autor

Sharief, H.

• Department of Electrical Engineering, COMSATS Institute of Information Technology, Islamabad

autor

Riaz, R. A.

• Department of Electrical Engineering, COMSATS Institute of Information Technology, Islamabad,
• School of ECS, University of Southampton

Bibliografia

• [1] Win, M. Z. and Scholtz, R. A.: Impulse radio: how it works, IEEE Communications Letters, pp. 36–38, 1998.
• [2] Win, M. Z. and Scholtz, R. A.: On the energy capture of ultrawide bandwidth signals in densemultipath environments, IEEE Communications Letters, pp. 245–247, 1998.
• [3] Molisch, A. F. and Cassioli, D. and Chong, C. -C. and Emami, S. and Fort, A. and Kannan, B. and Karedal, J. and Kunisch, J. and Schantz, H. G. and Siwiak, K. and Win, M. Z.: A Comprehensive Standardized Model for Ultrawideband Propagation Channels, IEEE Transactions on Antennas and Propagation, pp. 3151–3166, 2006.
• [4] Saleh, A. and Valenzuela, R.: A Statistical Model for Indoor Multipath Propagation, IEEE Journal on Selected Areas in Communications, pp. 128–137, 1987.
• [5] Chia-Chin Chong and Su Khiong Yong: A Generic Statistical- Based UWB Channel Model for High-Rise Apartments, IEEE Transactions on Antennas and Propagation, pp. 2389–2399, 2005.
• [6] L. Hanzo and L-L. Yang and E-L. Kuan and K. Yen: Singleand Multi-Carrier DS-CDMA: Multi-User Detection, Space- Time Spreading, Synchronisation, Networking and Standards, John Wiley and Sons, England, 2003.
• [7] Klein, A. and Kaleh, G. K. and Baier, P. W.: Zero forcing and minimum mean-square-error equalization formultiuser detection in code-division multiple-access channels, IEEE Transactions on Vehicular Technology, pp. 276–287, 1996.