Efficient coherent neighbour cell search for synchronous 3GPP LTE system

Abstract

For a coherent neighbour cell search, the 3GPP long term evolution system detects a cell-specific secondary synchronisation channel by using the channel response estimated from the primary synchronisation channel (P-SCH). Owing to the limited number of P-SCH sequences, however, the channel response estimated from P-SCH does not exactly match the channel response of the target neighbour cell. To mitigate the effect of such channel mismatch problems, a simple technique is proposed which improves coherent neighbour cell search performance significantly.