Therefore spread-spectrum techniques are applied to distribute the emissions over a wider frequency range. In this article methods are discussed that allow the use of spread-spectrum modulation without introducing audible artifacts due to the modulation....
Two spread spectrum modulation techniques are used among the standards: direct-sequence spread spectrum (DSSS) and frequency-hopping spread spectrum (FHSS). Spread-spectrum techniques, whether employing direct sequence or frequency hopping, can be used for multiple access in a shared channel. In ...
A collective class of signaling techniques are employed before transmitting a signal to provide a secure communication, known as the Spread Spectrum Modulation. The main advantage of spread spectrum communication technique is to prevent interference whether it is intentional or unintentional....
spread spectrum modulation technique扩展频谱调制技术 3)spread spectrum扩展频谱 1.At present,spread spectrumtechnology has been extensively applied in the field of tactical anti-jamming communication.扩展频谱技术是抗干扰通信中的主要应用技术。 2.Contributed to the acquisition and Code tracing for the DSspr...
Spread Spectrum Frequency Modulation Techniques Even though the periodic frequency modulation is effective in spreading the frequency spectrum of noises, we will focus our discussion on pseudo-random modulation. In this technique, the clock shifts from one frequency to another in a pseudo-random fashion...
Spread Spectrum Modulation in Digital Communication - Explore the concept of spread spectrum modulation in digital communication, its types, advantages, and applications.
4. Hybrid spread spectrum We will concentrate on the two most popular techniques: Direct-Sequence and Frequency-Hopping, in this chapter. 7.3 Pseudo-Noise (PN) Sequence PN sequence is the code used for spreading the signal of transmission. The fre- ...
Spread spectrum communication techniques for a code division message multiplexing systemOF THE DISCLOSUREA transmission system is described, suitable for transmitting\nmultiple messages over a single carrier. At the transmitter, a message-\nmodulated carrier is given an additional modulation by an ...
This white paper discusses the concept and techniques of spread spectrum communications, initially developed for military use to enhance secure communications. Spread spectrum systems spread a signal over a wider frequency band than the original message while transmitting at the same signal power, mak...
Methods and apparatus for a spread spectrum modulated backscatter electronic shelf label systemTechniques for an electronic shelf label (ESL) system which uses a digital modulation technique for a modulated backscatter uplink from an ESL to a communication base station (CBS) which utilizes pseudo-...