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The CI/MC-CDMA systems is an adoption to Carrier Interferometry and actions to spreading codes in the MC-CDMA systems,CI codes can raise the capacity of system, lower peak average power ratio. In this paper use offset CI codes to transmit redundancy bits generated via channel coder, It is shown that BER performance of CI/MC-CDMA systems can be dramatically improved via channel coder, while still maintaining...
A new iterative channel estimation algorithm for orthogonal frequency division multiplexing (OFDM) systems was proposed based on maximum-likelihood (ML) by using a specially designed training symbol.The proposed channel estimation utilizes the hard-decision information provided by the decoder of bit-interleaved coded modulation (BICM) to exchange the information between the channel estimator and the...
The conventional superimposed pilot applied in OFDM system has drawback of low accuracy. An iterative channel estimation algorithm based on superimposed pilot is proposed for the combination of orthogonal frequency division multiplexing (OFDM) and bit-interleaved coded modulation (BICM) system. This algorithm makes full use of the information provided by decoding, and has two steps. Firstly, pilots...
Nowadays, synthetic aperture radar (SAR), with the features of all-weather and day and night imaging, are more and more widely used in military reconnaissance, and therefore, its electronic counter measures (ECM) attracts more and more attention. Due to the particularity of SAR, it is difficult for the traditional jamming techniques to work in interfering SAR. In this paper, the features of SAR ECM...
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