METHODS AND ARRANGEMENTS FOR PHASE TRACKING FOR MULTI-MODE OPERATION IN WIRELESS NETWORKS

摘要

Logic may comprise a single phase tracking implementation for all bandwidths of operation and the logic may adaptively change pre-defined and stored track parameters if the receiving packet is 1 MHz bandwidth. Logic may detect a packet and long training fields before performing a 1 MHz classification. Logic may auto-detect 1 MHz bandwidth transmissions by a property of the long training field sequences. Logic may auto-detect 1 MHz bandwidth transmissions by detecting a Binary Phase Shift Keying (BPSK) modulated first signal field symbol rather than the Quadrature Binary Phase Shift Keying (QBPSK) associated with the 2 MHz or greater bandwidth transmissions. Logic may perform an algorithm to determine an estimated phase correction value for a given orthogonal frequency division multiplexing symbol and several embodiments integrate this value with an intercept multiplier that may be 0.2 for 1 MHz transmissions and, e.g., 0.5 for 2 MHz or greater bandwidth communication.

主权项

1. A method to multi-mode phase track with shifting pilot tones, the method comprising:
receiving an orthogonal frequency division multiplexing (OFDM) transmission of a packet with pilot tones shifting locations between of OFDM symbols; processing a preamble of the packet to determine whether the OFDM transmission comprises a one megahertz bandwidth or comprises a bandwidth of two megahertz or greater; setting a track intercept multiplier value to 0.2 if the OFDM transmission comprises a one megahertz bandwidth; determining phase rotations of the pilot tones based upon the track intercept multiplier value; and performing phase tracking based upon the phase rotations.