منابع مشابه
Polyphase alternating codes
This work introduces a method for constructing polyphase alternating codes in which the length of a code transmission cycle can be p or p − 1, where p is a prime number and m is a positive integer. The relevant properties leading to the construction alternating codes and the algorithm for generating alternating codes is described. Examples of all practical and some not that practical polyphase ...
متن کاملOrthogonal-polarization alternating codes
[1] We propose that by using orthogonal polarizations for alternating bauds of an alternating code, improvements are available both in cycle length, by means of using weak condition alternating codes, and in code performance through a reduction of autocorrelation function estimate variances by a factor of 4. This means an increase in the speed of incoherent scatter radar experiments by the same...
متن کاملAssessment of Weighting Functions Used in Oppermann Codes in Polyphase Pulse Compression Radars
Polyphase is a common class of pulse compression waveforms in the radar systems. Oppermann code is one of the used codes with polyphone pattern. After compression, this code has little tolerant against Doppler shift in addition to its high side lobe level. This indicates that the use of Oppermann code is an unsuitable scheme to radars applications. This paper shows that the use of amplitude wei...
متن کاملassessment of weighting functions used in oppermann codes in polyphase pulse compression radars
polyphase is a common class of pulse compression waveforms in the radar systems. oppermann code is one of the used codes with polyphone pattern. after compression, this code has little tolerant against doppler shift in addition to its high side lobe level. this indicates that the use of oppermann code is an unsuitable scheme to radars applications. this paper shows that the use of amplitude wei...
متن کاملDetection and Parameter Estimation of Polyphase Codes Radar Signal Based on Fractional Autocorrelation
Polyphase codes radar signals (Frank, P1, P2, P3and P4 codes) derived from linear frequency modulated (LFM) waveforms have been widely used in low probability of intercept (LPI) radar. To solve the problem of higher computational complexity in detection and parameter estimation of the polyphase codes radar signals, a fractional autocorrelation based algorithm is proposed. The paper proved that ...
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ژورنال
عنوان ژورنال: Annales Geophysicae
سال: 2008
ISSN: 1432-0576
DOI: 10.5194/angeo-26-2237-2008