US 2011/0033001 A1 · Layer mapping method and data transmission method for MIMO system

Abstract

A method for indicating a combination between a codeword and a layer in a MIMO communication system, a layer mapping method, and a data transmission method using the same are disclosed. A minimum number of codeword-layer mapping combinations from among all available combinations based on the numbers of all codewords and all layers are pre-defined in consideration of a ratio of a codeword to a layer, a reception performance of a receiver, and reduction of combinations, so that a data transmission method using the predefined combinations is implemented. If a specific one codeword is mapped to at least two layers, a diversity gain can be acquired.

Claims16

Dependent claims

A layer mapping method for a spatial multiplexing in a Multi-Input Multi-Output (MIMO) system, the layer mapping method comprising:

a) modulating a predetermined bit block of each of at least one codeword, and generating a modulation symbol stream for each codeword;
and
b) mapping the modulation symbol for each of the at least one codeword to at least one layer according to one specific combination from among predetermined mapping combinations,
wherein, in each of the predetermined mapping combinations, a number of layers to which a single codeword is mapped is limited to a predetermined number or below, the predetermined number corresponds to a ratio acquired when a number of all layers is divided by a number of all codewords.

1 more element

A method for a transmitter of a Multi-Input Multi-Output (MIMO) system to transmit data via multiple transmission (Tx) antennas, the method comprising:

a) performing a channel encoding on a specific data block;
b) modulating a bit block formed by the channel-encoded data block, and generating a modulation symbol stream;
c) mapping modulation symbols contained in the modulation symbol stream to at least one layer according to either one of predetermined mapping combinations;
and
d) transmitting the layer-mapped symbols,
wherein each of the predetermined mapping combinations includes a specific combination in which a single codeword constituted by the symbol stream generated by said modulation of the specific data block is mapped to at least two layers, and
the specific combination is designed to alternately map the symbol streams constructing the single codeword to the at least two layers.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/585,702Filed 22 Sep 2009

Priority

KR 10-2007-00013535 Jan 2007

Published

10 Feb 2011

Term ends

Not estimatedThe source records don’t support an estimate.

Classification28 codes

H04B 7/0473
Taking physical layer constraints into account: taking constraints in layer or codeword to antenna mapping into account
H04L 1/0003
By adapting the transmission rate: by switching between different modulation schemes
H04L 1/0009
Systems modifying transmission characteristics according to link quality, e.g. power backoff: by adapting the channel coding
H04L 1/0041
By using forward error control: arrangements at the transmitter end

Layer mapping method and data transmission method for MIMO system

Life of this patent

Layer mapping method and data transmission method for MIMO system

Life of this patent

Abstract

Claims16