Apparatus and method for transferring multipath signal by non-equilibrium power in MIMO system

A multi-channel signal, output signal technology, applied in the direction of transmission control/equalization, diversity/multi-antenna system, space transmit diversity, etc., can solve the problem of complex decoding method, performance degradation of DSTTD communication system, inability to meet 2 antennas, etc. Achieve the effect of simple decoding, simplified decoding method and device, and reduced complexity

Active Publication Date: 2008-07-23
ALCATEL LUCENT SHANGHAI BELL CO LTD
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Problems solved by technology

[0005] However, on the spatial correlation channel, the DSTTD communication system will produce serious performance degradation; in addition, at the receiving end of the DSTTD communication system, only conventional MIMO system decoding methods, such as maximum similarity (ML) and other methods, can be used to decode the received signal. Decoding, usually this decoding method is more complicated; finally, this method can only use 4 antennas, but it cannot meet the commonly used 2 antennas

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  • Apparatus and method for transferring multipath signal by non-equilibrium power in MIMO system
  • Apparatus and method for transferring multipath signal by non-equilibrium power in MIMO system
  • Apparatus and method for transferring multipath signal by non-equilibrium power in MIMO system

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[0046] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with specific embodiments.

[0047] figure 1 It is a block diagram of an encoding processing device in a transmitter for encoding a signal to be transmitted according to a specific embodiment of the present invention.

[0048] Such as figure 1 As shown, two input signals (respectively named as the first input signal and the second input signal) are respectively sent to the first power amplifying device 11 and the second power amplifying device 13, wherein each input signal may contain Signals for testing channel characteristics, such as reference signals such as preamble signals or pilot signals, and each input signal may also include a test signal specially used to test the bit error rate of signal transmission.

[0049] The first power amplifying device 11 amplifies the power of the first input signal, and can determine its power gain according to a...

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Abstract

The invention provides a method and a device for obtaining diversity gain and spatial multiplexing gain simultaneously by a simple mode of the system in an MIMO communication system and complex degree of signal detection of a receiving end is low. The invention takes non-equilibrium power to transmit signals in layers, namely the power of signals on each layer is respectively amplified in different gains before spatial time coding, then signals which are coded are transmitted through a plurality of antennae, simultaneously, the invention also provides a method for detecting optimum transmitting power on the basis of feedback information of a receiver.

Description

technical field [0001] The invention relates to a multiple-input multiple-output (MIMO) communication system, in particular to a method and device for transmitting space-time coded signals in the MIMO system. Background technique [0002] At present, MIMO technology is being extensively researched and applied because of its advantages in transmission capacity and spectrum efficiency. People have developed many different types of MIMO systems, such as space-time block coding (STBC), vertical layered Space-time code (VBLAST) and other systems, some of which have been applied in many advanced broadband wireless communication standards, such as 3G long-term evolution technology (LTE, Long Term Evolution) and global microwave interoperability technology (WIMAX, World Interoperability for Microwave Access). [0003] In the existing MIMO schemes, their performances have their own advantages and disadvantages. For example, the STBC scheme can obtain complete diversity performance a...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B7/04H04B7/005
CPCY02D30/70
Inventor 吴克颖朱孝龙杨红卫蔡立羽
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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