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US 2013/0170534 A1Published application
Successive interference cancellation system and method for mimo horizontal encoding and decoding
AssigneeIntel Corporation
InventorsTzahi Weisman, Tom Harel, Ayelet Doron
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Abstract
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.
Claims20
A method for decoding first and second layers of MIMO-encoded OFDM symbols, comprising:
- extracting separate tones from each received MIMO-encoded OFDM symbol;
- MIMO decoding the first layer of an extracted tone using maximum likelihood detection to extract code blocks therefrom;
- performing an error check on the code blocks extracted from the first layer;
- for each 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 corresponding portions of the second layer using maximum likelihood detection by scanning only hypotheses for the second layer with the first layer forced to the remodulated code block;
- and
- for each code block of the first layer that fails the error check, MIMO decoding corresponding portions of the second layer using maximum likelihood detection
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A receiver, comprising:
- two or more antennas for receiving first and second layers of MIMO-encoded OFDM symbols;
- circuitry to perform a DFT on the received MIMO-encoded OFDM symbols to extract separate tones from each such symbol;
- a MIMO equalizer for decoding the first layer of an extracted tone using MLD to extract code blocks therefrom;
- a decoder for performing an error check on the code blocks extracted from the first layer;
- wherein the MIMO equalizer is to:
- for each code block of the first layer that passes the error check, remodulate the code block into one or more frequency domain symbols and MIMO decode corresponding portions of the second layer using maximum likelihood detection by scanning only hypotheses for the second layer with the first layer forced to the remodulated code block;
- and
- for each code block of the first layer that fails the error check, MIMO decode corresponding portions of the second layer using maximum likelihood detection.
5 more elements
Dependencies are inferred from the claim text.