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- W2092296337 abstract "Consideration is given to the determination of the distortion introduced by the ionosphere on radar waveforms from which we can in turn obtain the effect of the resolution capabilities, the measurement capabilities and the dynamic range of a radar system. The analysis was carried out for a variety of waveforms: A rectangular pulse; a Gaussian pulse; an unweighted chirped pulse; a Taylor weighted chirped pulse, weighted to provide 40 db sidelobe level; and finally, an unweighted and Taylor weighted step frequency coded pulse, the weighting being used to provide 40 db sidelobe level. It was found that the available bandwidth of the ionosphere was dependent to some extent on the receiver processing used. In particular, it was found that if an unweighted chirp pulse is transmitted, and if on reception, this signal is Taylor weighted with the weighting being adjusted to give 40 db skirt levels, then the available bandwidth can be increased by 50 per cent over that for the case where no weighting is used in the receiver. The available bandwidth was also found to be dependent on the waveform transmitted. For example, if a chirp signal is transmitted and Taylor weighting used in the receiver, then the available bandwidth is at least 50 per cent greater than if a Gaussian pulse is transmitted. For a system carrier frequency of 2 kmc and an uncompensated receiver, it was found that the available bandwidth is 120 mc for a system using either a Gaussian pulse, an unweighted chirped pulse, or an unweighted step frequency coded signal. For the system using a chirped signal or a step frequency coded signal and Taylor weighting on reception, the available bandwidth was found to be 180 mc at the 2 kmc carrier frequency. A more complete summary of the results obtained on the available bandwidth for the various signals considered is given in Table I. The results given in the table apply for an uncompensated receiver. The resolution achievable by the radar will most of the time be one over the maximum available bandwidth indicated in the table." @default.
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- W2092296337 date "1965-07-01" @default.
- W2092296337 modified "2023-10-01" @default.
- W2092296337 title "Effect of ionosphere on radar waveforms" @default.
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- W2092296337 doi "https://doi.org/10.1016/0016-0032(65)90024-4" @default.
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