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
Estimating the term…
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 espective OFDM symbol.
Claims20
A method of generating a packet preamble for OFDM transmission, comprising:
- generating a plurality of OFDM preamble segments, wherein at least one of the OFDM preamble segments comprises a plurality of sample values;
- grouping a first subset of the OFDM preamble segments into a first section of contiguous OFDM preamble segments of a first part of the packet preamble so that similar OFDM preamble segments are included in the first section;
- and
- grouping a second subset of the OFDM preamble segments into a second section of contiguous OFDM preamble segments of the first part of the packet preamble so that some of the OFDM preamble segments included in the second section are non-similar 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.
A method of generating a packet preamble, comprising:
- generating a plurality of preamble segments;
- grouping a first subset of the preamble segments into a first section of contiguous preamble segments of a first part of the packet preamble, wherein the first section preamble segments are similar to one another;
- and
- grouping a second subset of the preamble segments into a second section of contiguous preamble segments of the first part of the packet preamble, wherein at least two of the second section preamble segments are not similar to one other preamble segments in the second section, and wherein the first section and the second section partially overlap.
Dependencies are inferred from the claim text.