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Symbol chromatography is nisi in a more support receivers

机译：符号色谱法在更多支持者中更是可喜

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摘要

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.

机译：实现了OFDM信号的改善的同步。受控振荡器（8）提供时钟脉冲以导出输入信号的复杂样本，将其施加到用于数据恢复的快速傅里叶变换（5）和同步单元（9）上。同步单元产生输入和延迟的输入的复数乘积XY *，将其施加到高通滤波器（30）以抑制低于符号频率的频率。滤波器输出通过符号梳状滤波器（40）施加到自适应限幅器（50），该自适应限幅器确定信号的实部和虚部分量的较大幅度。脉冲处理器（60）在符号脉冲的前沿产生单个脉冲，该脉冲被施加到符号计数器（70）。符号计数器包括两个计数级，它们被安排为快速锁定，但是可变以适应OFDM信号中的不同保护间隔。

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公开/公告号DE69825658T2

专利类型
公开/公告日2005-07-14

原文格式PDF
申请/专利权人 BRITISH BROADCASTING CORP. LONDON GB;
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申请/专利号DE1998625658T
发明设计人 ROBINSON ADRIAN PAUL TADWORTH SURREY KT20 6NP GB;STOTT JONATHAN HIGHTON TADWORTH SURREY KT20 6NP GB;CLARKE CHRISTOPHER K.P. TADWORTH SURREY KT20 6NP GB;
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申请日0000-00-00
分类号H04L27/26;
国家 DE
入库时间 2022-08-21 21:58:59

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