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Receiver of multi-input-output multi-carrier system and antenna selection apparatus and method thereof

A multi-carrier system and receiving antenna technology, which is applied in the field of communication systems, can solve the problems of mutual interference of signal streams, complex interference of signal streams, and ineffective effects.

Active Publication Date: 2009-05-20
REALTEK SEMICON CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when multiple signal streams are transmitted together, since the signal streams will interfere with each other, if the antenna is selected according to the strength of the received signal, no obvious effect will be produced.
[0003] As far as multi-carrier (multi-carrier) system is concerned, such as Orthogonal Frequency Division Multiplexing (OFDM) system, because it transmits signals on multiple sub-carriers (sub-carrier) at the same time, it is using MIMO technology When transmitting multiple signal streams, the interference between signal streams will be more complicated. If the receiving antennas with the strongest signal energy are directly selected for signal detection, the effect will be even less obvious.

Method used

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  • Receiver of multi-input-output multi-carrier system and antenna selection apparatus and method thereof
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  • Receiver of multi-input-output multi-carrier system and antenna selection apparatus and method thereof

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Embodiment Construction

[0024] In the embodiments described below, the multi-carrier system is an OFDM system as an example. However, those with ordinary knowledge in the technical field of the present invention can extend the technical features of the present invention to other multi-carrier systems, so the scope of the present invention should not be limited to OFDM systems.

[0025] FIG. 1 is an architecture diagram of a multi-carrier system according to an embodiment of the present invention. In the figure, the multi-carrier system 1 is a MIMO-OFDM system, its transmitter 11 has Nt transmitting antennas 111, and the receiver 12 has Nr receiving modules 121, and each receiving module 121 represents a receiving path, which includes receiving antennas 1211 and OFDM Unit 1212. Before transmitting and receiving data in the multi-carrier system 1, the transmitter 11 will first transmit a specific preamble signal. After each receiving antenna 1211 receives the preamble signal, it will be processed by t...

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Abstract

The invention discloses a receiver for a multi-carrier system with multiple input / output (MIMO), a receiving antenna selection device and a method thereof, which can effectively select a receiving antenna assembly with better signal detection efficiency, and promote system effectiveness. The selection device contains a channel estimation unit and an antenna selection unit. The channel estimation unit is used for producing corresponding channel matrixes of various MIMO channels on various subcarriers, and the antenna selection unit produces a transmission capacity parameter of various possible receiving antenna assemblies on the subcarriers according to the corresponding channel matrixes, and selects the receiving antenna assembly which can reach best whole transmission capacity according to the transmission capacity parameter.

Description

technical field [0001] The invention relates to a communication system, especially a receiver of a multi-input and output multi-carrier system and its receiving antenna selection device and method. Background technique [0002] In today's communication systems, in order to achieve higher transmission rates and wider transmission ranges, multiple input and output (Multiple Input Multiple Output, referred to as MIMO) technology is often used, that is, multiple transmitting antennas and receiving antennas are used. Allows simultaneous transmission of multiple independent signal streams. Although the MIMO technology can increase the system performance, the use of multiple receiving antennas will increase the power consumption of the receiver of the system. Therefore, how to effectively select an antenna with better signal detection performance among all receiving antennas is very important for reducing power consumption. When only one signal stream is transmitted at the same t...

Claims

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Application Information

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IPC IPC(8): H04L27/26H04L1/06H04B7/04
Inventor 林郁男
Owner REALTEK SEMICON CORP