关键词：通信；下行链路；无线电频率；MIMO
摘 要：FEC techniques are compared for different MIMO configurations of a high altitude, extremely wide bandwidth radio frequency downlink. Monte Carlo simulations are completed in MATLAB(trade 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. Results show that the best performing system configuration was unable to meet both criteria, but was capable of improving over Brueggen's 2012 research, which used Reed-Solomon codes and a MIMO configuration of 80:160, 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 2/3 LDPC code with QAM constellation of 16 symbols.