Nghĩa của từ spread spectrum bằng Tiếng Việt
@Chuyên ngành kỹ thuật
@Lĩnh vực: toán & tin
-phổ trải rộng
Đặt câu có từ "spread spectrum"
1. Spread-spectrum clock generator
2. Systems and methods for spread spectrum distributed acoustic sensor monitoring
3. Spread spectrum clock generating apparatus and method having low jitter characteristic
4. Synchronization to a base station and code acquisition within a spread spectrum communications system
5. 12 Spread spectrum technology competes in the unregulated portion of the radio electromagnetic spectrum.
6. Surface acoustic wave device for a differential phase-shift direct-sequence spread-spectrum signal receiver
7. Improvements in or relating to the reception of spread spectrum signals using adaptive antenna arrays
8. A method of pulse-position modulation with more than one spread-spectrum code (301, 302, 303).
9. Method for automatically lowering the acquisition and tracking thresholds of spread spectrum codes received in orbit
10. The invention concerns a method for improving resistance to deliberate or accidental jamming of a receiver of spread-spectrum radio signals transmitted by polarized wave.
11. In the present work the behavior of a Pseudo Noise (PN)-Spread Spectrum system in the presence of a highly impulsive plus Gaussian noise environment is studied.
12. The invention provides a dual-band spread-spectrum modulator (101, 103, 105) which uses a single, relatively narrow, synthesizer to serve two operating frequency bands (102, 104).
13. The method may be used in frequency or time diversity systems or for demodulating a frequency-hopping spread spectrum signal without a priori knowledge of the frequency-hop pattern.
14. In a discrete multitone spread spectrum system, a base station distinguishes between normal collisions and noise bursts when receiving access request signals from remote units on a common access channel.
15. In a discrete multitone spread spectrum system, a base station distinguishes between normal collisions and noise bursts when receiving access request signals for remote units on a common access channel.
16. "Radar spread spectrum" (6) means any modulation technique for spreading energy originating from a signal with a relatively narrow frequency band, over a much wider band of frequencies, by using random or pseudo-random coding.
17. “Radar spread spectrum” (6) means any modulation technique for spreading energy originating from a signal with a relatively narrow frequency band, over a much wider band of frequencies, by using random or pseudo-random coding.
18. A method for automatically lowering the acquisition and tracking thresholds of spread spectrum codes received in orbit by a receiver accessing an orbital navigator inside or outside the receiver, a phase loop and a code loop.
19. In, Region of Interest (ROI) is used as water marking and encrypted by linear feed Backshift register using stream cipher mode with 64-bit private and public key, embedded into medical image by spread spectrum method
20. Instead of using a general sigma-delta frequency synthesizer or an analog frequency modulation system, the spread-spectrum clock generator of the present invention comprises a phase frequency detector (PFD), a charge pump (CP), a loop filter and an oscillator, the frequency of which is adjusted by an analog voltage signal and an N-bit digital signal.
21. A slope controlled modulation Spread Spectrum TDMA System used in tracking the absolute position of moving targets by radio or other electromagnetic or acoustic radiated energy systems having a master clock (M) transmitting time reference to a network of fixed receivers (RX¿1?, RX¿2?...), a mobile transmitter in a vehicle (V) generating a signal (Tx) with a stimulus preceding the prescribed modulation signal.