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BER Performance of SS System Using a Huffman Sequence against CW Jamming
Takahiro MATSUMOTO Hideyuki TORII Yuta IDA Shinya MATSUFUJI
Publication
IEICE TRANSACTIONS on Fundamentals of Electronics, Communications and Computer Sciences
Vol.E101A
No.1
pp.167175 Publication Date: 2018/01/01
Online ISSN: 17451337 Type of Manuscript: Special Section PAPER (Special Section on Wideband Systems) Category: Keyword: spreadspectrum (SS) system, finitelength sequence, Huffman sequence, intersymbol interference (ISI), continuous wave interference (CWI), additive white Gaussian noise (AWGN),
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Summary:
In this paper, we theoretically analyse the influence of intersymbol interference (ISI) and continuous wave interference (CWI) on the bit error rate (BER) performance of the spread spectrum (SS) system using a realvalued Huffman sequence under the additive white Gaussian noise (AWGN) environment. The aperiodic correlation function of the Huffman sequence has zero sidelobes except the shiftend values at the left and right ends of shift. The system can give the unified communication and ranging system because the output of a matched filter (MF) is the ideal impulse by generating transmitted signal of the bit duration T=NT_{c}, N=2^{n}, n=1,2,… from the sequence of length M=2^{k}N+1, k=0,1,…, where T_{c} is the chip duration and N is the spreading factor. As a result, the BER performance of the system is improved with decrease in the absolute value of the shiftend value, and is not influenced by ISI if the shiftend value is almost zerovalue. In addition, the BER performance of the system of the bit duration T=NT_{c} with CWI is improved with increase in the sequence length M=2^{k}N+1, and the system can decrease the influence of CWI.

