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US 2007/0177688 A1Published application
System and method employing linear dispersion over space, time and frequency
OwnerJinsong Wu, Steven Blosteininventors
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Abstract
Systems and methods for performing space time coding are provided. Two vector→matrix encoding operations are performed in sequence to produce a three dimensional result containing a respective symbol for each of a plurality of frequencies, for each of a plurality of transmit durations, and for each of a plurality of transmitter outputs. The two vector→matrix encoding operations may be for encoding in a) time-space dimensions and b) time-frequency dimensions sequentially or vice versa.
Claims36
A method comprising:
- performing two vector→matrix encoding operations in sequence to produce a three dimensional result containing a respective symbol for each of a plurality of frequencies, for each of a plurality of transmit durations, and for each of a plurality of transmitter outputs.
A method comprising:
- defining a plurality of subsets of an overall set of OFDM sub-carriers;
- for each subset of the plurality of subsets of OFDM sub-carriers:
- performing a linear dispersion encoding operation upon a plurality of input symbols to produce a two dimensional matrix output;
- partitioning the two dimensional matrix into a plurality of matrices, the plurality of matrices consisting of a respective matrix for each of a plurality of transmit antennas;
- transmitting each matrix on the respective antenna by mapping rows and columns to sub-carrier frequencies and transmit symbol durations or vice versa.
2 more elements
A method comprising:
- performing a linear dispersion encoding operation upon a plurality of input symbols to produce a two dimensional matrix output;
- partitioning the two dimensional matrix into a plurality of two dimensional matrix partitions;
- transmitting the partitions by executing one of:
- transmitting each matrix partition during a respective transmit duration in which case the matrix partition maps to multiple frequencies and multiple transmitter outputs;
- and
- transmitting each matrix partition on a respective frequency in which case the matrix partition maps to multiple transmit durations and multiple transmitter outputs;
- transmitting each matrix partition on a respective transmitter output in which case the matrix partition maps to multiple frequencies and multiple transmit durations.
4 more elements
A method comprising:
- receiving a three dimensional signal containing a respective symbol for each of a plurality of frequencies, for each of a plurality of transmit durations, and for each of a plurality of transmitter outputs;
- performing two matrix→vector decoding operations in sequence to recover a set of transmitted symbols.
Dependencies are inferred from the claim text.