发明名称 |
Symbol synchronization in multicarrier receivers |
摘要 |
<p>Improved synchronization of OFDM signals is achieved. A controlled oscillator (8) provides clock pulses to derive complex samples of an input signal which are applied both to a fast Fourier transform (5) for data recovery and to a synchronization unit (9). The synchronization unit generates the complex product XY* of the input and the delayed input, which is applied to a high-pass filter (30) to suppress frequencies below the symbol frequency. The filter output is applied through a symbol comb filter (40) to an adaptive slicer (50) which determines the larger magnitude of the real and imaginary components of the signal. A pulse processor (60) generates a single pulse at the leading edge of the symbol pulse which is applied to a symbol counter (70). The symbol counter includes two count stages arranged to lock in quickly and yet be variable to accommodate different guard intervals in the OFDM signal. <IMAGE></p> |
申请公布号 |
EP0876031(A2) |
申请公布日期 |
1998.11.04 |
申请号 |
EP19980303468 |
申请日期 |
1998.05.01 |
申请人 |
BRITISH BROADCASTING CORPORATION |
发明人 |
STOTT, JONATHAN HIGHTON;ROBINSON, ADRIAN PAUL;CLARKE, CHRISTOPHER K.P. |
分类号 |
H04L1/00;H04L25/03;H04L27/00;H04L27/26;H04N5/00;H04N5/455;H04N7/24;(IPC1-7):H04L27/26 |
主分类号 |
H04L1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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