The effects of timing jitter and tracking on the performance of impulse radio

Impulse radio (IR) is a promising ultra-wideband technique for tactical military communications. A key feature of time-hopping IR are the very narrow pulses used to convey information. Analysis of such time-hopping schemes under a variety of assumptions have been reported in the literature. However, none of these studies to date consider the effects of timing jitter and tracking on time-hopping in a ultra-wideband (UWB) setting. We consider the effects of timing jitter and tracking on the performance of binary and 4-ary UWB communications. We find that the performance of IR is very sensitive to timing jitter and tracking, at least in part due to the very narrow pulses. We also find that in the presence of timing jitter and tracking, orthogonal 4-ary pulse position modulation (PPM) out performs binary offset PPM at all jitter levels in thermal and pulse noise. Simulation results are presented that quantify the sensitivity of binary and 4-ary IR to timing jitter and tracking error.

[1]  Heinrich Meyr,et al.  Digital communication receivers - synchronization, channel estimation, and signal processing , 1997, Wiley series in telecommunications and signal processing.

[2]  K. Kallman,et al.  Jitter performance of a baseband sampled code tracking loop , 1994, IEEE Trans. Commun..

[3]  Robert A. Scholtz,et al.  Multiple access with time-hopping impulse modulation , 1993, Proceedings of MILCOM '93 - IEEE Military Communications Conference.

[4]  J. K. Townsend,et al.  A novel impulse radio network for tactical military wireless communications , 1998, IEEE Military Communications Conference. Proceedings. MILCOM 98 (Cat. No.98CH36201).

[5]  J. K. Townsend,et al.  Performance of hard decision detection for impulse radio , 1999, MILCOM 1999. IEEE Military Communications. Conference Proceedings (Cat. No.99CH36341).

[6]  Lawrence E. Larson,et al.  A Si/SiGe HBT timing generator IC for high-bandwidth impulse radio applications , 1999, Proceedings of the IEEE 1999 Custom Integrated Circuits Conference (Cat. No.99CH36327).

[7]  F. Ramirez-Mireles,et al.  Multiple-access with time hopping and block waveform PPM modulation , 1998, ICC '98. 1998 IEEE International Conference on Communications. Conference Record. Affiliated with SUPERCOMM'98 (Cat. No.98CH36220).

[8]  Griff L. Bilbro,et al.  Performance of local power control in peer-to-peer impulse radio networks with bursty traffic , 1997, GLOBECOM 97. IEEE Global Telecommunications Conference. Conference Record.

[9]  Moe Z. Win,et al.  Ultra-wide bandwidth time-hopping spread-spectrum impulse radio for wireless multiple-access communications , 2000, IEEE Trans. Commun..

[10]  J. J. Spilker.  Digital Communications by Satellite , 1994 .

[11]  Heinrich Meyr,et al.  Digital communication receivers , 1997 .

[12]  Moe Z. Win,et al.  On the robustness of ultra-wide bandwidth signals in dense multipath environments , 1998, IEEE Communications Letters.

[13]  J. K. Townsend,et al.  Evaluation of the covertness of time-hopping impulse radio using a multi-radiometer detection , 2001, 2001 MILCOM Proceedings Communications for Network-Centric Operations: Creating the Information Force (Cat. No.01CH37277).