Methods and arrangements for orthogonal training sequences in wireless networks

摘要

Logic may implement an orthogonal frequency division multiplexing (OFDM) system operating in the one gigahertz and lower frequency bands. Logic may detect new long training sequences that are differentially orthogonal to each other for a first bandwidth mode of operation such as a one megahertz mode as well as differentially orthogonal to half of the long training sequence for a second bandwidth mode of operation such as a two megahertz or greater mode. Logic may implement two or more long training sequences for the first bandwidth mode of operation to transmit information based upon the selection of the particular long training sequence for the transmission. Logic may implement a new acknowledgement packet comprising a short training sequence and a long training sequence without a signal field and without a payload. And logic may implement bandwidth detection logic to classify a transmission based upon orthogonal properties of the long training sequences.

主权项

1. A method comprising:
receiving an indication to transmit a first packet; selecting, from a group of two or more long training sequences, a first long training sequence to generate the first packet based upon an association between the first packet and the first long training sequence, wherein each of the two or more long training sequences is defined to cross-correlate to zero with other long training sequences in the group and each of the two or more long training sequences communicate different information, the information being in addition to training; and transmitting the first packet to an antenna for transmission.