MODULATION AND CODING DESIGN TO PROVIDE TWO ORDERS OF MAGNITUDE IMPROVEMENTS IN METEOR BURST COMMUNICATION

CNR HAS DEVELOPED HF COMMMICATIONS TERMINALS WITH CNR'S UNIQUE PROTOCOLS AND CODE COMBINING TECHNIQUES FOR OPTIMIZING INFORMATION TRANSFER OVER STRESSED, TIME-VARYING CHANNEL CONDITIONS IN ACCORDANCE WITH AVAILABLE CHANNEL CAPACITY, ANTI-JAM AND LPI CONSTRAINTS. CNR SURENET TERMINALS SUPPORT ERROR-FREE TRAFFIC IN BOTH POINT-TO-POINT AND NETWORK OPERATIONS AND ARE CAPABLE OF INTERFACING TO 2-88 MHZ RF TRANSCEIVERS AS WELL AS UHF SATELLITE AND WIRELINE MEDIA. THE EFFORT PROPOSED HERE EXTENDS THE EXISTING TECHNOLOGY INTO THE VHF BAND USING THE METEOR BURST TRANSMISSION MECHANISMS APPLIED VIA AN ARRAY PROCESSING STRATEGY TO REALIZE ORDERS OF MAGNITUDE IMPROVEMENTS IN PERFORMANCE OVER CONVENTIONAL SINGLE CHANNEL SYSTEMS AND AT THE SAME TIME PROVIDE MAXIMUM LPI PROTECTION IN CONJUNCTION WITH LOW POWER OPERATION. AN ARRAY OF HIGH SPEED CODE COMBINER PROCESSORS USING MULTIPLE WAVEFORMS SPREAD OVER MULTIPLE FREQUENCY BANDS TO TRANSMIT PROBELESS PACKETS COMBINED WITH THE USE OF MULTIPLE DIRECTIVE ANTENNAS POINTED TOWARD AREAS OF HIGH METEOR DENSITY PROVIDE THE BASIS FOR SIGNIFICANT PERFORMANCE IMPROVEMENT SIMILAR TO THE APPROACH USED BY PARALLEL PROCESSORS FOR INCREASING COMPUTER POWER. DETAILED SPECIFICATIONS AND PERFORMANCE PREDICTIONS WILL BE PREPARED THAT DESCRIBE BOTH AN ON-THE-AIR DEMONSTRATION CONFIGURATION USING OFF-THE SHELF DISCRETE COMPONENTS AS WELL AS A FUTURE INTEGRATED METEOR BURST COMMUNICATIONS SYSTEM. ANTICIPATED BENEFITS/POTENTIAL APPLICATIONS - THIS NEW TECHNOLOGY IS DIRECTLY APPLICABLE TO BOTH FIXED AND MOBILE TACTICAL AND EMERGENCY COMMMICATIONS SYSTEMS USED BY MILITARY, GOVERNMENT AND COMMERCIAL ENTITIES. APPLICATIONS INCLUDE EXPANSION OF EXISTING MULTIPLE MEDIA BASED COMMMICATIONS SUITES TO USE VHF BAND AS WELL AS PROVISION OF RAPID NETWORK ESTABLISHMENT CAPABILITY FOR REMOTE FIELD STATION CONNECTIVITY USING A SECURE PRIVATE BROADCAST MEDIA.