sumproductdecodertest.java

density evolution for LDPC codes design and some related documents

// =================================================================
//
// SumProdcutDecoderTest.java
//
// 懳悢椞堟sum-product暅崋朄偺僥僗僩僾儘僌儔儉
//
// 奐敪娐嫬
// Windows2000
// Java 2 SDK, Standard Edition
// Version 1.3.1
//
// 摦嶌妋擣娐嫬
// Windows2000
// java version "1.3.1_02"
// Java(TM) 2 Runtime Environment, Standard Edition (build 1.3.1_02-b02)
// Java HotSpot(TM) Client VM (build 1.3.1_02-b02, mixed mode)
//
//
// (C) Tadashi Wadayama, 2002
// Since April 12, 2002
// =================================================================


public class SumProductDecoderTest {
  public static void main(String ar[]) {

    System.out.println("=================================");
    System.out.println("Log domain sum-product decoder");
    System.out.println("(C) Tadashi Wadayama, 2002");
    System.out.println("=================================");

				// 捠怣楬偼壛朄揑敀怓僈僂僗捠怣楬傪壖掕
				// 憲怣岅偼僆乕儖楇晞崋岅

    double var = 0.794328;	// 暘嶶
    double r[] = {1.620803,0.264281,-0.031637,-0.127654,0.746347,1.003543}; // 庴怣岅
    double[] lambda = new double[6];	// 懳悢栟搙斾
    for (int i=0; i <= 5; i++) lambda[i] = 2.0 * r[i] /var; // 懳悢栟搙斾偺寁嶼
    SumProductDecoder a = new SumProductDecoder("6.3.spmat"); // 暅崋婍僀儞僗僞儞僗嶌惉
							      // 専嵏峴楍偺spmat宍幃僼傽僀儖傪巜掕
    a.dec(lambda,5);		// sum-product暅崋乮戞2堷悢偼嵟戝斀暅夞悢乯

  }

}