Time Hopping Codes in Impulse Radio Multiple Access Communication Systems

In this paper, we address the problem of designing time hopping codes for multiple access communication impulse radio systems. Time hopping techniques are first reviewed, and performance in terms of correlation properties and Power Spectral Density are given. A new family of time hopping codes is presented, and performance are derived. Finally, advantages and disadvantages of different time hopping codes in terms of resource assignment for multiple-access communication systems are analyzed and discussed. INTRODUCTION Impulse radio (IR) is a spread spectrum technique that uses very short duration pulses and pulse position modulation for transmitting information. The transmitted signal is: ( ) ( ) ∑ ∑ ∞