METHOD AND APPARATUS FOR REDUCTION OF FM INERFERENCE FOR FM IN-BAND ON-CHANNEL DIGITAL AUDIO BROADCASTING SYSTEM.

摘要

METHOD AND APPARATUS FOR REDUCTION OF FM INTERFERENCE FOR FM IN-BAND ON-CHANNEL DIGITAL AUDIO BROADCASTING SYSTEM. THIS INVENTION RELATES TO A METHOD FOR REDUCING FM INTERFERENCE IN AN IN-BAND ON-CHANNEL DIGITAL AUDIO BROADCASTING SYSTEM, COMPRISING THE STEP OF RECEIVING A COMPOSITE SIGNAL INCLUDING A SIGNAL OF INTEREST AND AN INTERFERING SIGNAL. NORMALIZING THE COMPLETE SIGNAL TO PRODUCE A NORMALIZED COMPOSITE SIGNAL; MULTIPLYING SAID COMPOSITE SIGNAL BY A COMPELX CONJUGATE OF SAID NORMALOIZED COMPOSITE SIGNAL TO PRODUCE A REAL SIGNAL; FILTERING SAID REAL SIGNAL TO PRODUCE A FILTERED SIGNAL; AND MULTIPLYING SAID FILTERED SIGNAL BY SAID NORMALIZED COMPOSITE SIGNAL TO PRODUCE AN OUTPUT SIGNAL, WHEREIN THE ADVERSE EFFECTS OF THE INTERFERING SIGNAL IN THE OUTPUT SIGNAL HAVE BEEN REDUCED.