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Improved detection algorithm for serial interference deletion in optimal approach to zero

A technology of serial interference deletion and detection method, which is applied in the direction of preventing/detecting errors through diversity reception, baseband system components, etc., can solve problems such as high computational complexity, reduce computational complexity, and avoid direct calculation of pseudo-matrix The effect of the inverse operation

Inactive Publication Date: 2009-09-23
SHENZHEN TINNO WIRELESS TECH
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Problems solved by technology

[0005] Aiming at the problems caused by the high computational complexity of the optimal zero-forcing serial interference deletion detection method, the present invention provides a detection method that greatly reduces the computational complexity

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  • Improved detection algorithm for serial interference deletion in optimal approach to zero
  • Improved detection algorithm for serial interference deletion in optimal approach to zero
  • Improved detection algorithm for serial interference deletion in optimal approach to zero

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Embodiment Construction

[0028] The present invention will be described in detail below through the accompanying drawings and examples.

[0029] The detection method of the present invention is applicable to MIMO systems, or other communication systems that can be modeled as MIMO systems. For example, the present invention can be directly used on any sub-carrier of a multiple-input multiple-output orthogonal frequency division multiplexing (MIMO-OFDM) system, and can also be used for multi-user detection in a code division multiple access system.

[0030] figure 1 A block diagram of a MIMO system is shown. At the transmitting end, the data bits are first mapped into signals in the signal constellation, and after serial-to-parallel conversion, multiple parallel baseband signals are formed, and then modulated and transmitted from multiple different antennas at the same time; after wireless channel fading, Signals and noise from different transmitting antennas are superimposed and received by multiple ...

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Abstract

The invention provides an improved optimal zero-forcing serial interference cancellation detection method, which is suitable for a multiple-input multiple-output (abbreviated as: MIMO) system or a communication system that can be modeled as a MIMO system. The basic principle is: use the zero-forcing weight matrix obtained in the previous stage of detection to accurately deduce the zero-forcing weight matrix and zero-forcing weight vector of the next stage of detection. Compared with the traditional optimal zero-forcing serial interference deletion detection method, the detection method provided by the invention effectively reduces the computational complexity without loss of performance.

Description

technical field [0001] The present invention relates to a signal detection technology of a wireless communication system, in particular to a signal detection technology of a multiple-input multiple-output (abbreviated as: MIMO) system. Background technique [0002] The latest research shows that using multiple transmitting antennas and receiving antennas in a wireless fading environment can double the channel capacity of a wireless communication system. Such systems employing multiple transmit and receive antennas are generally referred to as multiple-input multiple-output (MIMO) systems. Since the MIMO system can break through the limitation of wireless frequency resources and effectively improve the system spectrum efficiency, it is considered to be one of the main physical layer technologies for future high-speed wireless communication systems. Scholars at home and abroad have done a lot of in-depth research on the related technologies of MIMO systems, among which the de...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L25/02H04L1/06
Inventor 罗振东赵明刘思杨刘元安
Owner SHENZHEN TINNO WIRELESS TECH