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1. Narrowband Advanced Mobile Phone Service?

2. A modified approach for narrowband adaptive beam pattern optimisation is proposed by using a varying step size in the optimisation procedure.

3. This paper proposes a method for narrowband interference suppression in Direct Sequence Spread System ( Ds-SS ).

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4. Finally, a new rejection method for time-varying narrowband interference (TVNBI) is presented, that is based on adaptive wavelet packet transform with time decomposition.

5. Narrowband watermarking information is spread into wideband pseudo-random code before being embedded by modifying the scale of the distance between vertexes in two-dimensional engineering graphics.

6. The radio spectrum used in narrowband Personal Communications Services ( PCS ).

7. Frequency resolution 1 Hz, also suitable for extremely narrowband tests.

8. Secondly, this thesis deeply researches narrowband interference suppression technique based on lapped transform.

9. The technique of orthogonal narrowband noise modulation is based upon the classical formula of narrowband random signal.

10. Simulations with narrowband interference of BPSK, multitone and mixture of both show that the algorithm is suitable to the suppression of various narrowband interferences .

11. For RFI and narrowband noise interferences, this dissertation studies notch filter and spectrum equilibrium and uses them to suppress narrow jammings in signal domain.

12. The principle of comb filter and narrowband filter to realize matched filtering of pulse train is analyzed.

13. The narrowband LDPC code platform is constructed to test the ratio error of the LDPC decoder, for the restriction of the software debugging.

14. Wavelet package has better decomposition characters than wavelet, and can demarcate signal frequency space more effectively. Thus, it is used for eliminate periodic narrowband interference.

15. In detail, the main goals of the "broadband strategy" are to transform from narrowband communication to broadband communication, and from providing access to providing access and content.

16. Therefore, OFDM technique can convert a wideband Rayleigh fading channel to a series of narrowband flat fading channels, which makes the equalization for a high speed rate system simpler.

17. Based on the directional array response vector, the simulation algorithm on the impulse response matrix of the narrowband MIMO channels is proposed.

18. The essence of the fact that wideband signal can not be effectively transmitted using narrowband phased array in scenarios with large aperture and scan angle is given.

19. According to frequency spectrum transfer characteristic of modulation and demodulation, we think the position measurement noise is Gaussian narrowband noise.

20. The simulation results show that the HF TDLs communication based on multitone parallel transmission can avoid narrowband jamming effectively such as multitone jamming.

21. In this paper, a LTJ-based adaptive nonlinear filter and the application for narrowband interference suppression in satellite CDMA communication systems is researched.

22. The communication simulation model of HF multitone parallel transmission is established, and the anti-jamming performance of narrowband and broadband is analyzed based on the model.

23. For radar and sonar systems, wideband condition has more applications and suitability than narrowband condition.

24. Starting from paraxial wave equation, analytical propagation expressions of hyperbolic secant pulsed beams with narrowband and broadband are derived.

25. For fast and accurate design and production of lumped constant bandwidth frequency-hopping(FH) narrowband filter, a load structure changing with frequency is introduced.

26. The broadband monitoring receiver related to the paper is improved on the narrowband VXI-3570 receiver, increasing the spectrum scan step, enhance the monitoring efficiency.

27. The term multicarrier modulation includes a number of transmission schemes whose main characteristic is the decomposition of any wideband channel into a set of independent narrowband channels.

28. In the second part of this thesis, an application of adaptive all-pass based notch filter (ANFA) with Gaussian-Newton adaptive algorithm in a GPS narrowband anti- jamming system was presented.

29. A wideband radar signal model is developed. The limitations of the narrowband radar signal model are discussed. The constraint conditions of the wideband signal are investigated.

30. The simulation result shows that the new algorithm can restrain the broadband noise, narrowband noise and multi-path interfere.