发明名称 |
Reduction of clipping in a multicarrier transmitter |
摘要 |
<p>In an OFDM transmitter, the input signal is modified in several different ways by sign switches (22) operating on sub-bands generated by a splitter (20). An inverse fast Fourier transform circuit (14) generates an output for each of all the possible types of modification producing a plurality of candidate signals. The signal of best quality is selected by subjecting the candidate signals to processing in a model (54) representing the transmitter amplifier (16), and estimating the candidate signal of best quality determined by a clip energy estimator (58) and/or a low-level estimator (60). A control circuit (64) then causes the transmitter to transmit the candidate signal of best quality together with signalling information indicating the corresponding setting of the sign switches (22). <IMAGE></p> |
申请公布号 |
EP1104140(A2) |
申请公布日期 |
2001.05.30 |
申请号 |
EP20000310571 |
申请日期 |
2000.11.29 |
申请人 |
BRITISH BROADCASTING CORPORATION |
发明人 |
MOSS, PETER NEIL |
分类号 |
H04L27/26;(IPC1-7):H04L27/26 |
主分类号 |
H04L27/26 |
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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