US 8,009,780 B2 · Apparatus and method for generating effective signal to noise ratio (SNR) per stream in multiple-input multiple-output (MIMO) wireless communication system

Abstract

A multiple-input multiple-output (MIMO) wireless communication system includes a first calculator for calculating pairwise error rates (PERs) for each modulation scheme combination which comprise elements smaller than or equal to receive antennas in number; a second calculator for calculating symbol error rates (SERs) for the each modulation scheme combination using the PERs; a converter for converting the SERs to effective signal to noise ratios (SNRs); and a determiner for determining one among sets of effective SNR per stream acquired from the modulation scheme combinations, as a final effective SNR per stream.

Claims20

Dependent claims

A receiving end apparatus in a multiple-input multiple-output (MIMO) wireless communication system, comprising:

a first calculator for calculating a pairwise error rate (PER) for each modulation scheme combination which comprise elements smaller than or equal to receive antennas in number;
a second calculator for calculating a symbol error rate (SER) per stream for the each modulation scheme combination using the pairwise error rates;
a converter for converting symbol error rates to effective signal to noise ratios (SNRs);
and
a determiner for determining one among sets of effective signal to noise ratio per stream acquired from the each modulation scheme combination, as a final effective signal to noise ratio per stream.

2 more elements

An operating method of a receiving end in a multiple-input multiple-output (MIMO) wireless communication system, the method comprising:

calculating pairwise error rates (PERs) for each modulation scheme combination which comprise elements smaller than or equal to receive antennas in number;
calculating symbol error rates (SERs) for the each modulation scheme combination using the pairwise error rates;
converting the symbol error rates to effective signal to noise ratios (SNRs);
and
determining one among sets of effective signal to noise ratio per stream acquired from the each modulation scheme combination, as a final effective signal to noise ratio per stream.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

12/217,868Filed 9 Jul 2008

Priority

KR 2007-00687869 Jul 2007

Published

US 2009/0016457 A115 Jan 2009

Granted

30 Aug 2011

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

H04L 27/0008
Modulated-carrier systems: arrangements for allowing a transmitter or receiver to use more than one type of modulation
H04B 7/0434
Power distribution: using multiple eigenmodes
H04B 7/0619
Of weighted versions of same signal: using feedback from receiving side
H04B 7/063
Feedback content: parameters other than those covered in groups H04B7/0623 - H04B7/0634, e.g. channel matrix rank or transmit mode selection

Apparatus and method for generating effective signal to noise ratio (SNR) per stream in multiple-input multiple-output (MIMO) wireless communication system

Life of this patent

Apparatus and method for generating effective signal to noise ratio (SNR) per stream in multiple-input multiple-output (MIMO) wireless communication system

Life of this patent

Abstract

Claims20