English

DTIC ADA494084: Performance Analysis of a JTIDS/Link-16-type Waveform Transmitted over Slow, Flat Nakagami Fading Channels in the Presence of Narrowband Interference

Link-16 is a tactical data link. It provides presumably secure and jam-resistant tactical information for land, sea, and air platforms. The communication terminal of Link-16 is called Joint Tactical Information Distribution System (JTIDS) and features Reed-Solomon (RS) coding, symbol interleaving, cyclic code-shift keying (CCSK) for M-ary symbol modulation, minimum-shift keying (MSK) for chip modulation, and combined frequency-hopping and direct sequence spread spectrum for transmission security. In this dissertation, the performance of a JTIDS/Link-16-type waveform in both additive white Gaussian noise (AWGN) and narrowband interference transmitted over a slow, flat Nakagami fading channel is investigated. In general, the results show that barrage noise interference (BNI) has the most effect in degrading JTIDS's performance when signal-to interference ratio (SIR) is small, whereas pulsed-noise interference with a smaller fraction of time that interference is on causes the greatest degradation when SIR is large, whether the channel is fading or not. In addition, two modified JTIDS/Link-16- compatible systems are proposed and evaluated. The first system uses errors-and-erasures deco

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