Impulse radio provides many promising features for wireless communications in a dense multipath environment. However, a number of these features result from the enormous effective processing gain, which can make acquisition difficult at the receiver. In this paper, a recently developed theory of minimum complexity sequential detection is applied to the hybrid acquisition problem. As I previous hybrid schemes, a number of hypotheses are checked as a group; however, a hypothesis is disregarded as soon as it looks unlikely rather than waiting for a "winner" to be chosen from the group. Another hypothesis then re places the disregarded hypothesis. It is shown that this novel scheme can improve average acquisition times for highly spread systems.
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