The trade-off between processing gains of impulse radio systems in the presence of timing jitter

S. Gezici, A.F. Molisch, H.V. Poor, H. Kobayashi
2004 2004 IEEE International Conference on Communications (IEEE Cat. No.04CH37577)  
In time hopping impulse radio, N f pulses of duration Tc are transmitted for each symbol. This gives rise to two types of processing gain: (i) pulse combining gain, which is a factor N f , and (ii) pulse spreading gain, which is Nc = T f /Tc, where T f is the mean interval between two subsequent pulses. This paper investigates the trade-off between these two types of processing gain with and without random polarity codes in the presence of timing jitter. Approximate expressions for bit error
more » ... bability are derived for both coded and uncoded systems over additive white Gaussian noise channels and are used as the criterion to choose optimal N f and Nc values. The effects of timing jitter and multiple access interference on the selection of optimal system parameters are explained through theoretical analysis. Simulation studies support the theoretical results. 4 In coded systems, the polarity of all pulses are determined by a random polarity code sequence and a binary information bit, as will be explained later.
doi:10.1109/icc.2004.1313214 dblp:conf/icc/GeziciMPK04 fatcat:ukib6xp4h5evtak52vgcyir5em