Successive interference cancellation system and method for MIMO horizontal encoding and decoding

摘要

A method and system for receiving and decoding horizontally encoded MIMO-OFDM transmissions with improved efficiency. In one embodiment, MIMO decoding is performed on each of the extracted separate tones of a MIMO-OFDM signal to extract and demodulate frequency domain symbols of the first layer corresponding to one or more code blocks. For each code block of the first layer that passes an error check, corresponding portions of the second layer are decoded using SIMO decoding.

主权项

1. A method for decoding first and second layers of MIMO-encoded (multi-input multi-output encoded) OFDM (orthogonal frequency division multiplexing) symbols, comprising:
receiving the MIMO-encoded OFDM symbols made up of first and second layers, wherein each of the first and second layers contains tones belonging to code blocks that are per-antenna encoded with a forward error correction code; extracting separate tones from each received MIMO-encoded OFDM symbol; MIMO decoding only the first layer of the extracted tones using maximum likelihood detection to extract a predetermined number of frequency-domain symbols therefrom, where the predetermined number of frequency domain symbols corresponds to a code word having one or more code blocks contained therein; extracting code blocks from the MIMO-decoded first layer of the extracted tones and performing an error check thereon; for extracted tones that belong to the code block of the first layer that passes the error check, remodulating the code block into one or more frequency domain symbols and MIMO decoding the second layer of those extracted tones using maximum likelihood detection by scanning only hypotheses for the second layer with the first layer forced to the remodulated code block; and for extracted tones that belong to a code block of the first layer that fails the error check, MIMO decoding only the second layer of those extracted tones using maximum likelihood detection.