The performance of a time hopping combined with pulse position modulation ultra wide band system with a nonlinear receiver using an adaptive filter and a soft-limiter in the presence of narrowband interference has been considered. This system brings a significant performance improvement compared with the system that uses an adaptive filter and a linear receiver, particularly in the case of high-interference power where its absence leads to the reception loss. Also, the proposed receiver has much better interference rejection performance compared with minimal mean-square error interference rejection, in case of high-interference power (interference to signal ratios from 30 to 65 dB).

A design concept to support both the initial planning and the management of land mobile radio networks with slow frequency-hopping signaling is proposed. It is applicable to the networks with advanced architecture of which the Pan European networks may be an example. The design consists of two planning processes: spatial and frequency planning. A novel heuristic is used to optimize the base station locations with respect to the total interference-to-signal ratio in a network. This ensures economic coverage of the network service area as well as efficient frequency reuse. A repeated application of the same heuristic to the currently measured and/or predicted data offers powerful means to manage a network in order to keep its resources highly available to their users, as is shown in a simulation example which includes not only sources of unintentional (cochannel, adjacent channel, and intermodulation) interference but also sources of intentional (jammer) interference.>