Accession Number:

ADA576056

Title:

Improving Bandwidth Utilization in a 1 Tbps Airborne MIMO Communications Downlink

Descriptive Note:

Master's thesis

Corporate Author:

AIR FORCE INST OF TECH WRIGHT-PATTERSON AFB OH GRADUATE SCHOOL OF ENGINEERING AND MANAGEMENT

Personal Author(s):

Report Date:

2013-03-21

Pagination or Media Count:

105.0

Abstract:

FEC techniques are compared for di erent MIMO con gurations of a high altitude, extremely wide bandwidth radio frequency downlink. Monte Carlo simulations are completed in MATLABtrade name with the aim of isolating the impacts of turbo codes and LDPC codes on system throughput and error performance. The system is modeled as a transmit-only static array at an altitude of 60,000 feet, with no interferers in the channel. Transmissions are received by a static receiver array. Simulations attempt to determine what modulation types should be considered for practical implementation, and what FEC codes enable these modulation schemes. The antenna con gurations used in this study are 44352, 62248, and 80160 transmitters to receivers. E ects from waveform generation, mixing, down-conversion, and ampli cation are not considered. Criteria of interest were BER and throughput, with the maximum allowable value of the former set at 1 x 10-5, and the latter set at a 1 terabits per second Tbps transfer rate for a successful con guration. Results show that the best performing system con guration was unable to meet both criteria, but was capable of improving over Brueggens 2012 research, which used Reed-Solomon codes and a MIMO con guration of 80160, by 18.6. The best-case configuration produced a throughput rate of 0.83 Tbps at a BER of less than 1 x 10 to the minus 8th power, by implementing a rate 23 LDPC code with QAM constellation of 16 symbols.

Subject Categories:

  • Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE