An OFDM Frequency Hopping System with a new Resource Planning Scheme

摘要

The downlink performance of orthogonal frequency division multiplexing (OFDM) frequency hopping system with time-frequency mapping patterns derived from Costas sequence is analyzed in a multi-cell multi-user scenario. Through the comparison of frequency hopping system and non frequency hopping system, frequency hopping is proved to be effective in averaging inter-cell interference. To mitigate inter-cell interference further and enhance system performance, a resource planning scheme that is suitably designed for frequency hopping systems is proposed. Based on "reuse partition", the scheme provides interference avoidance by allocating a different prior slot for each cell. The resources in the non-prior slots also can be used due to the interference average induced by frequency hopping. It is demonstrated by simulation results that the proposed scheme is able to mitigate inter-cell interference further when the system load is under a certain value.