wiki:OFDM/MIMO/Docs/PHYDetails/FrameFormat

Version 1 (modified by murphpo, 17 years ago) (diff)

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MIMO OFDM? | Documentation? | OFDM Frame Format

The frame format for the WARP MIMO OFDM core is based loosly on the frame format specified in the IEEE 802.11a wireless networking standard.

Each frame is divided into four sections, illustrated below:

*Preamble: a hard-coded 320-sample sequence used by the receiver for AGC, carrier frequency offset estimation and symbol timing estimation *Training: hard-coded OFDM symbols used for channel estimation. The number of training symbol periods is programmable per-packet. *Base Rate: a programmable number of OFDM symbols containing a packet's header, modulated using the user-specified base-rate modulation scheme. *Full Rate: a programmable number of OFDM symbols containing a packet's payload, modulated using the user-specified full-rate modulation scheme.

The WARP MIMO OFDM core supports both single (SISO) and two antenna (MIMO) modes. The frame formats for these two modes are detailed below.

SISO Frame Format

No image "SISO_Frame_Format.png" attached to OFDM/MIMO/Docs/Images

MIMO Frame Format

No image "MIMO_Frame_Format.png" attached to OFDM/MIMO/Docs/Images