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Method and device for estimating CINR of MLD receiver in MIMO system

A receiver and receiving antenna technology, applied in the field of digital communication, can solve problems such as inability to calculate CINR, lack of signal power characteristics, etc.

Active Publication Date: 2011-01-26
ZTE CORP
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Problems solved by technology

Since the LLR of the bit stream is the logarithmic likelihood ratio used for channel decoding, it does not have the power characteristics of the signal, so the CINR cannot be calculated

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  • Method and device for estimating CINR of MLD receiver in MIMO system
  • Method and device for estimating CINR of MLD receiver in MIMO system

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Embodiment Construction

[0024] The specific implementation manners of the present invention will be described in detail below in conjunction with the accompanying drawings.

[0025] The present invention mainly relates to a method for estimating CINR of signals received by SM technology based on MIMO. The CINR method can realize CINR estimation of MLD receivers and can estimate multiple different users at the same time.

[0026] In a MIMO SM system, the data streams of multiple users can be regarded as mutual interference, and the process of solving SM is equivalent to multi-user data detection. Using H-BLAST with SM [BLAST, Bell Labs Layered Space-Time, layered space-time coding, including H-BLAST (horizontal space-time coding), V-BLAST (vertical space-time coding), D-BLAST (diagonal space-time coding) Time coding)] encoding multiple data streams as an example, it is necessary to estimate the CINR of each data stream after de-spatial multiplexing.

[0027] Demultiplexing receivers can be divided in...

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Abstract

The invention discloses a method and a device for estimating carrier to interference noise ratio (CINR) of a maximum likelihood detector (MLD) receiver in a multiple input multiple output (MIMO) system. The method comprises the following steps of: for each transmitting signal, acquiring wireless channel response of the transmitting signal to a plurality of receiving antennas and covariance of noise and interference, wherein the interference covariance is the sum of wireless channel united response of other transmitting signals; and for each transmitting signal, calculating the CINR of the transmitting signal according to the wireless channel response and the covariance of noise and interference. The device comprises a channel response acquisition module, a covariance acquisition module and a CINR calculation module for calculating the CINR of the transmitting signal according to the wireless channel response and the covariance of noise and interference for each transmitting signal. The method and the device implement CINR estimation of the MLD receiver, and also can estimate multiple users.

Description

technical field [0001] The present invention relates to the field of digital communication, in particular, relates to a carrier-to-interference-to-noise ratio (Carrier to Interference) of a maximum likelihood detection (Maximum Likelihood Detector, MLD) receiver in a Multiple Input Multiple Output (MIMO) system Noise Ratio, CINR) estimation method and device. Background technique [0002] Carrier to Interference Noise Ratio (CINR) is a ratio of signal power to interference plus noise power, which is an important parameter reflecting channel quality. The estimation of CINR is of great significance. The system can adjust the encoding method and transmission power according to CINR. [0003] As a multi-antenna technology, one of the main features of the Multiple Input Multiple Output (MIMO) system is to transform the traditionally harmful signal multipath propagation into a favorable factor. It makes full use of channel fading over time and multipath delay expansion to double...

Claims

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Application Information

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IPC IPC(8): H04L25/02H04L1/00H04L1/06H04B1/707H04B17/20
Inventor 杨芸霞杨祁
Owner ZTE CORP
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