| 摘要 |
Methods ( 500, 800 ) and corresponding systems ( 100, 200, 300, 400, 900 ) for generating a pilot symbol ( 330 ) include providing an M-point parallel transform sequence that is a discrete Fourier transform of a CAZAC sequence ( 312, 504 - 508 ). The M-point parallel transform sequence ( 312 ) is distributed ( 316, 510 ) to a set of M subcarriers among N subcarriers to form an N-point frequency-domain sequence ( 318 ) wherein the M subcarriers are evenly spaced apart. An N-point inverse fast Fourier transform ( 320, 512 ) is performed to convert the N-point frequency-domain sequence to an N-point time-domain sequence ( 322 ). The N-point time-domain sequence is converted ( 324, 514 ) to a serial sequence ( 326 ), and a cyclic prefix is added ( 328, 516 ) to the serial sequence to form a pilot symbol ( 330 ).
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