SYSTEMS AND METHODS FOR PHASE ROTATING DUPLICATE FRAMES IN WIRELESS LAN TRANSMISSION

摘要

Methods, devices, and computer program products for optimally phase rotating duplicate frames in wireless LAN transmissions are disclosed. In one aspect, phase rotation sequences may be chosen in order to minimize a peak-to-average power ratio (PAPR) of a frame or data unit, or of a portion of a frame or data unit, where the frame contains a plurality of identical frequency segments, such as a duplicate frame. The method involves selecting a frame bandwidth, and then selecting a phase rotation sequence based upon the frame bandwidth. The method further includes generating a frame including a number of identical 1 MHz frequency segments, and rotating some of those segments relative to other segments, based on the selected phase rotation sequence. The method further includes transmitting the frame.

主权项

1. A wireless communication apparatus, comprising:
a processor configured to:
select a frame bandwidth of one of 2 MHz, 4 MHz, and 8 MHz;select a phase rotation sequence based at least in part on the frame bandwidth, comprising:
if the frame bandwidth is 2 MHz, selecting a phase rotation sequence of [1 −1], or a scaled version of [1 −1];if the frame bandwidth is 4 MHz, selecting a phase rotation sequence of [1 j −j −1], or a scaled version of [1 j −j −1];if the frame bandwidth is 8 MHz, selecting a phase rotation sequence of [1 −1 1 1 1 1 −1 −1], or a scaled version of [1 −1 1 1 1 1 −1 −1];generate a frame of the selected bandwidth, the frame having a plurality of identical 1 MHz frequency segments wherein at least one of the identical 1 MHz frequency segments is rotated with respect to at least one other identical 1 MHz frequency segment based upon the selected phase rotation sequence; and a transmitter configured to transmit the frame having a plurality of identical 1 MHz frequency segments.