发明名称 |
Method to improve ATSC-VSB transceiver performance employing a time-frequency waveform processor |
摘要 |
A backward compatible enhancement to ATSC-VSB transmissions is provided to enable intra-field channel estimation for better channel equalization. One or more time-frequency waveforms are inserted into the transmitted signal with systematic time and frequency variation synchronized to the currently available field sync. A coherent demodulator may then directly estimate the channel frequency response. The power of the inserted waveform(s) is small compared to the existing 8-VSB signal, such that existing receivers will function as intended with only minimal degradation of performance. |
申请公布号 |
US8238404(B2) |
申请公布日期 |
2012.08.07 |
申请号 |
US20010040173 |
申请日期 |
2001.10.23 |
申请人 |
VAIDYANATHAN KRISHNAMURTHY;BURNS GEOFFREY F.;KONINKLIJKE PHILPS ELECTRONICS N.V. |
发明人 |
VAIDYANATHAN KRISHNAMURTHY;BURNS GEOFFREY F. |
分类号 |
H04B1/713;H04L25/02;H04L25/03 |
主分类号 |
H04B1/713 |
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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