| 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). |
| 主权项 |
1. A single carrier frequency division multiple access (SC-FDMA) transmitter, comprising:
a pilot sequence generator configured to generate a serial pilot sequence; a serial-to-parallel converter configured to convert the serial pilot sequence to a parallel pilot sequence; and a SC-FDMA modulator configured to modulate an input sequence, wherein the SC-FDMA modulator is a multi-carrier modulation block configured to generate a plurality of orthogonal subcarriers, wherein the input sequence comprises the parallel pilot sequence, wherein the parallel pilot sequence is mapped to at least a subset of the plurality of subcarriers, wherein output of the SC-FDMA modulator includes an added cyclic prefix, and wherein the SC-FDMA modulator is further configured to provide the output to a transmitter block for transmission. |
