发明名称 |
OFDM communication apparatus and method, wherein the pilot symbols are weighted in order to reduce the peak to average power ratio |
摘要 |
An Orthogonal Frequency Division Multiplex (OFDM) transmitter (100) comprises a symbol generator (103) for generating a first OFDM symbol comprising user data and pilot data where the pilot data comprises a set of predetermined non-orthogonal pilot symbols. A weight generator (109) uses an amplitude estimator (107) for selecting a set of weights for the pilot data of the first OFDM symbol in response to a time domain amplitude variation characteristic of the first OFDM symbol. In particular, the peak to average power ratio may be determined. The set of weights are selected from a discrete alphabet of weights. A weight processor (113) determines a second OFDM symbol by weighting the pilot symbols by the set of weights. The second OFDM symbol is transmitted to a receiver without transmitting identification of the selected set of weights. The receiver may perform a blind detection of the applied weights and may compensate the received pilot symbols for the estimated weight. |
申请公布号 |
EP1679849(B1) |
申请公布日期 |
2014.02.26 |
申请号 |
EP20050290064 |
申请日期 |
2005.01.11 |
申请人 |
MOTOROLA SOLUTIONS, INC. |
发明人 |
MUCK, MARKUS;ROUQUETTE-LEVEIL, STEPHANIE;DE COURVILLE, MARC |
分类号 |
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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