发明名称 |
RACH RECEPTION BY REPEATED USE OF DATA FFT AND CONCATENATION OF THE RESULTING TIME SIGNALS |
摘要 |
Methods and devices for extracting a RACH preamble using as input a number of Fast Fourier Transformed symbols, in order to extract a random access channel (RACH) preamble from a signal received in a base station from a user device, in a radio communication system, are provided. An initial cyclic prefix (symbol CP) is removed prior to performing FFT on symbols. After (1) selecting from the FFT of a symbol frequencies corresponding to the RACH band all other non-RACH frequency bins having been set to zero, (2) shifting the signal to baseband and (3) performing a FFT on the baseband signal, a phase adjustment is performed to compensate for group delays due to symbol CP gaps occurring when generating the baseband signal, the phase adjustment being determined individually for each symbol. |
申请公布号 |
WO2012164422(A1) |
申请公布日期 |
2012.12.06 |
申请号 |
WO2012IB52340 |
申请日期 |
2012.05.10 |
申请人 |
TELEFONAKTIEBOLAGET L M ERICSSON (PUBL);MCGOWAN, NEIL;DA SILVEIRA, MARTHINUS, WILLEM |
发明人 |
MCGOWAN, NEIL;DA SILVEIRA, MARTHINUS, WILLEM |
分类号 |
H04L27/26 |
主分类号 |
H04L27/26 |
代理机构 |
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地址 |
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