OFDM transmission method, which is intended both for sporadic and for continuous data communication, for a WLAN
AssigneeLantiq Deutschland GmbH
InventorStefan Fechtel
Life of this patent
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Abstract
In an OFDM-based transmission method it can be stated for the preamble (4, 7) of a data packet that its N preamble segments (B, B) are obtained from the segment-by-segment multiplication of an initial segment, which is fixed for all N preamble segments, by a multiplication sequence with a length of N elements. It can be stated for the OFDM data symbols that a plurality of OFDM symbols which are transmitted successively in time each include at least one pilot signal, with the respective subcarrier which transmits the at least one pilot signal being dependent on the time index of the respective OFDM symbol.
Claims11
A method of generating a packet preamble for OFDM transmission, comprising:
- generating a plurality of OFDM preamble segments each of which comprises a plurality of sample values;
- grouping a first subset of the OFDM preamble segments into a first section of a first part of the packet preamble so that only identical OFDM preamble segments are included in the first section;
- and
- grouping a second subset of the OFDM preamble segments into a second section of the first part of the packet preamble so that some of the OFDM preamble segments included in the second section are non-identical and some of the OFDM preamble segments included in the second section are also included in the first section so that the first and second sections overlap.
Dependencies are inferred from the claim text.