To solve the connectional problems by regarding the pilot tones of a generated pilot tone hopping sequence as multiple pilot tones and without transmitting any of them, each time the frequency range of the generated pilot tone hopping sequence exceeds the usable bandwidth of a specific system.
Base station discrimination and downlink synchronization are actualized, by using a pilot including known symbols transmitted with specific frequency tone at individual specific time intervals. More specifically, the symbols used for the pilot are arranged characteristically in time-frequency grids having positions specified by a periodical pilot tone hopping sequence. In a specific embodiment, cycles of the pilot tone hopping sequence start with a Latin-square based hopping sequence, and are discharged for a certain time and constituted by sequentially changing the offset and order possibly over frequencies. A specific example of the pilot tone hopping sequence is a parallel slope hopping sequence selected, so that the periodicity of the sequence is a prime number of symbol time intervals.
LI JUNYI
UPPALA SATHYADEV VENKATA
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