spread spectrum造句
1. Spread spectrum technique can improve the robustness of watermarking.
2. The frequency diversity spread spectrum multiple access (FD/SSMA) is a new spread spectrum system, which is based on the theory of parallel data transmission.
3. A new chaotic spread spectrum communication system FFH-FMDCSK is presented, which is based on FMDCSK and fast frequency hopping techniques.
4. The spread spectrum codes and the simulation performance of single cell LAS-CDMA (Large Area Synchronized Code Division Multiple Access) system are studied.
5. Spread spectrum was conducted first, and then it was embedded into watermark by means of integer modulo .
6. In spread spectrum communication system, the capability of pseudo-noise (PN) code can impact the performance of the whole system directly.
7. But using spread spectrum communication on power line can attain reliability's demand . "
8. The EMC81057 Clock Oscillator is an advanced spread spectrum modulator with a standard TTL or CMOS compatible output that meets clock requirements of all major CISC, RISC, and DSP processors.
9. Spread spectrum technology competes in the unregulated portion of the radio electromagnetic spectrum.
10. In a lot of antijamming techniques for direct spread spectrum system (DSSS), the DSSS signal is approximately considered as a stationary process.
11. Spread Spectrum Watermark complete source code can be used directly.
12. Basing on spread spectrum theory , CDMA system need use many orthogonal code to distinguish different channels and users .
13. Deriving from direct sequence spread spectrum, efficient spread spectrum can solve the inconsistency in transmission bandwidth and process gain, and improve the anti-jamming ability of the system.
14. The transmitter unit mainly consisted of differential encoding, spread spectrum and BPSK modulation and so on.
15. It uses ARM and spread spectrum together and gives hardware of pronunciation communication module, extended memory of main control module, spread spectrum treating module, CPLD module and so on.
16. A better method for direct sequence spread spectrum ( DSSS ) receiver to decrease the acquisition time is proposed.
17. Finally, making use of autocorrelation function characteristic of spread spectrum sequence, watermark information was detected. In the detection process, it is not requisite for initial carrier image.
18. By combining error-correcting code with Direct Sequence Spread Spectrum, we can improve not only the system anti-interference capability but also the reliability and security of the system.
19. According to the signal synchronization of LEO's direct sequence spread spectrum (DSSS) communication, a method based on software radio platform was described.
20. Using quasi-stochastic property and ergodic theory of chaos, a kind of new hybrid DS/SFH spread spectrum communication scheme is presented based on VSSsynchronization technique.
21. By using 32 bit Cyclic Code Shift Keying(CCSK) code-word S0 to establish spread spectrum space, the tamed spread spectrum was completed.
22. Contributed to the acquisition and Code tracing for the DS spread spectrum com munication systems, this paper presents the scheme of sliding search self-synchronization for a DS system.
23. Computer simulations show that it is superior to the conventional approaches in most cases and thus is a good approach for narrow-band interference suppression in spread spectrum systems.
24. Pseudo random sequence has broad applications in stream cipher , channel coding, and spread spectrum communication.
25. Division Multiple Access System ( CDMA ) is a Multi - User wireless Communication system depending on spread spectrum code.
26. The main ways of anti - interferences are adaptive array, spread spectrum and processing in frequency domain.
27. Secondly, the coefficients quantization - based image watermarking using spread spectrum communication was discussed.
28. An anti-jamming algorithm for narrow-band interference in direct sequence spread spectrum systems , which is based on the adaptive IIR notch filtering is introduced.
29. This paper introduces an AFC algorithm for a zero - intermediate frequency direct - sequence spread spectrum digital receiver ...
30. Time-frequency analysis method is an effective method of identifying the narrow-band interference in the wide-band spread spectrum signal.
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