Performance analysis of a LINK-16/JTIDS compatible waveform transmitted over a channel with pulse-noise interference

Abstract

Public reporting burden for this collection of information is estimated to average 1 hour per response, including the time for reviewing instruction, searching existing data sources, gathering and maintaining the data needed, and completing and reviewing the collection of information. Send comments regarding this burden estimate or any other aspect of this collection of information, including suggestions for reducing this burden, AUTHOR Dimitrios Lekkakos FUNDING NUMBERS PERFORMING ORGANIZATION NAME(S) AND ADDRESS(ES)Naval ABSTRACT (maximum 200 words)The Joint Tactical Information Distribution System (JTIDS) is a hybrid frequency-hoped, direct sequence spread spectrum system that utilizes a (31, 15) Reed-Solomon (RS) code and cyclical code-shift keying (CCSK) modulation for the data packets, where each encoded symbol consists of five bits. In this thesis, an alternative waveform consistent with the existing JTIDS channel waveform is analyzed. The system to be considered uses (31, 15) RS encoding as the original JTIDS, but each pair of five-bit symbols at the output of the RS encoder undergo serial-to-parallel conversion to two five-bit symbols, which are then independently transmitted on the in-phase (I) and quadrature (Q) component of the carrier using 32-ary orthogonal signaling with 32 chip baseband waveforms such as Walsh functions. This system is consistent with the direct sequence waveform generated by JTIDS. The performance obtained with alternative waveform is compared with that obtained with the existing JTIDS waveform for the relatively benign case where additive white Gaussian noise (AWGN) is the only noise present as well as when pulse-noise interference (PNI) is present. Errors-and-erasures decoding (EED) as well as errors only decoding is also considered. Based on the analyses, we conclude that the proposed alternative Link-16/JTIDS compatible waveform performs better than the existing Link-16/JTIDS waveform in AWGN as well as when PNI is present for both coherent and noncoherent demodulation. No significant advantage is obtained by using errors-and-erasures decoding (EED) for the alternative Link-16/JTIDS compatible waveform. NUMBER OF PAGES 110 SUBJECT TERMS

Study on Link16 System with Frequency Hopping Collision Interference

“…In the Ref. [2], a performance analysis of a Link16 compatible waveform using errors-and-erasures decoding under the jamming of pulse noise interference is examined. In comparison with Ref.…”

“…In comparison with Ref. [2], Ref. [3] employs an alternative error correction coding scheme for physical layer waveform and investigates the performance of Link16 with it in both AWGN (Additive White Gaussian Noise) and pulse noise interference.…”

Performance Analysis of Link-16 Waveform considering Frequency Remapping under PBNJ

“…Moreover, TDLs must provide robust information management in adverse operation environments [3] . Link-16 is a TDL used by the U.S. armed forces, NATO, and other allied forces.…”

“…The performance of Link-16 waveform under interference and fading has been investigated in previous studies [2][3][4] ; however, most studies focused on pulsed-noise interference (PNI), and they did not consider the frequency remapping of Link-16.…”

Research and implementation on demodulation algorithm of parameters-adjustable soft spread spectrum system in IOT

“…The Soft Spread Spectrum (m-ary spread spectrum) has several features: the anti-interference ability [1] , high modulation bandwidth utilization [2] , lower probability of intercept [3] and it can flexibly adjust the communication rate, spread spectrum gain which is suitable for IOT. The Zigbee protocol [4] and LINK16's CCSK use the similar technology [5] [6] . Structure of soft spread spectrum communication system is shown in figure 1.…”