| 摘要 |
PROBLEM TO BE SOLVED: To provide a cellular wireless system efficient in terms of spectrum. SOLUTION: This method uses offset between cells, especially, uses tone offset and time offset. When a first base station uses F1, F2,..., FN, a second base station adjacent to this first base station uses the tones of F1+Δf, F2+Δf,..., FN+Δf in the same frequency band. When the first base station starts continuous symbols at time T1, T2 and T3, the second base station adjacent to this first base station starts respective corresponding symbols at time T1+Δt, T2+Δt and T3+Δt. In the cellular system having the hexagonal cells, the tone sets of two adjacent cells are deviated just by 1/3 space between adjacent tones and the symbol timings of two adjacent cells are deviated just 1/3 symbol term. |
