Abstract
The LDACS 1 is an alternative to the current Very High Frequency (VHF) technology which meets needs of upcoming demands. LDACS 1, an Orthogonal Frequency Division Multiplexing (OFDM) operates in the L-Band between 960-1167MHz frequencies installed in the middle of two DME channels with 500 kHz spectral gap. In this paper, a LDACS 1 OFDM and LDACS 1 2x2 MIMO are designed and simulated without any interference. The Distance Measuring Equipment (DME) interference is introduced only to the LDACS1 OFDM, and significant degradation in the performance is observed. The pulse blanking technique helps in lowering the interference in the LDACS1 OFDM system, resulting in a performance close to the performance in the interference-free case. The BER performances for the conditions without interference, with interference and pulse blanking are compared. An improvement in the BER performance is seen with respect to design of LDACS 1 2x2 MIMO system.
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