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Wireless communication apparatus

A technology for wireless communication systems and equipment, applied in the directions of diversity/multi-antenna systems, baseband system components, multi-frequency code systems, etc.

Inactive Publication Date: 2008-07-02
KK TOSHIBA
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, none of the above literature discusses the principle of applying the LLL algorithm or any other lattice reduction algorithm to groups of subcarriers

Method used

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  • Wireless communication apparatus
  • Wireless communication apparatus
  • Wireless communication apparatus

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Embodiment Construction

[0058] The invention will now be described in more detail with reference to the accompanying drawings.

[0059] Figure 1 shows such a system comprising a MIMO data communication system 10 having a well-known structure. Novel components according to specified embodiments of the present invention will become apparent from the following description.

[0060] Communication system 10 includes sending device 12 and receiving device 14 . It should be appreciated that in many cases wireless communication devices have combined transmitter and receiver equipment, but in this example the device is shown as a one-way communication device for simplicity.

[0061] Transmitting device 12 includes a data source 16 which provides data, including information bits, to a baseband mapping unit 20 which optionally provides forward error correction coding and channel interleaving and outputs modulated symbols. The modulated symbols are provided to a multiplexer 22 which combines the modulated symb...

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Abstract

This invention relates to methods, apparatus, and processor control code for signal detection in Multiple Input Multiple Output Orthogonal Frequency Division Multiplexed (MIMO-OFDM) communications systems. A method for determining outputs from a received signal in a lattice-reduction-aided receiver based multi-carrier wireless communications system having a plurality of sub-carriers divided into a plurality of sets of sub-carriers, the method comprising performing a detection method for each of said sets, the detection method comprising the step of applying lattice reduction to said set of sub-carriers thereby generating a reduced basis channel response.

Description

technical field [0001] The present invention relates to methods, devices and processor control codes for signal detection in multiple-input multiple-output (MIMO) communication systems. More specifically, the present invention relates to signal detection in MIMO Orthogonal Frequency Division Multiplexing (MIMO-OFDM) communication systems. Background technique [0002] A traditional communication system can be expressed mathematically as: [0003] y=Hx+v [0004] where, for a MIMO communication system, y is an n×1 vector representing the received signal, H is an n×m channel matrix that simulates the transmission characteristics of the communication channel, x is an m×1 vector representing the transmitted symbols, and v is an n× 1 noise vector, and where m and n denote the number of transmit and receive antennas, respectively. [0005] Recent publications have shown how the performance of MIMO detection methods can be improved using a technique called Lattice Reduction. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L25/02
CPCH04L25/0246H04L27/2647H04B7/08H04L25/02H04L27/26
Inventor A·G·利利D·P·麦克纳马拉M·S·T·桑德尔
Owner KK TOSHIBA
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