The present invention is applicable to the field of communications, used for performing frequency multiplexing.
The multiplexed video signals from the VBI multiplexing portion (51) and the audio signals descrambled by a descrambler (39) are multiplexed by a frequency multiplexing portion (53) and are sent to a cable.
In the plural beam method or system, the frequency components for each beam are determined using frequency-division multiplexing.
An OFDM receiver system for performing precise OFDM demodulation is provided.
A frequency division multiplexing (FDM) mode and a code division multiplexing (CDM) mode are used to multiplex the control signals for the plurality of users.
The system comprises means to perform network and frequency time-sharing and/or orthogonal frequency-division multiple access (OFDMA).
A communication system (Figure 2) that provides TDM and FDM communications between communication units (104).
This invention relates generally to transmitting and receiving frequency division multiplex signals and, more precisely, to a method and apparatus for transmitting and receiving orthogonal frequency division multiplex (OFDM) signals.
Multiplexing of the pilot and the data includes a time division multiplexing and frequency division multiplexing.
The mobile unit may use time division multiplexing, frequency division multiplexing, and/or code division multiplexing.
Extended data is conveyed by a process of orthogonal frequency division multiplexing (804).
A method is described for processing a signal modulated by frequency division multiplexing in a receiver, wherein the received signal is frequency- equalized.
Also provided is a circuit for frequency division multiplexing the output of said elemental detectors.
To that end, the invention proposes the use of frequency- or time-division multiplex transmission channels.
In a frequency division multiplexed scheme, the central office (175) may also include the basic filter.
The invention concerns a frequency-selective modulation and/or frequency-selective reception and demodulation component for use in the transmission of optical signals using frequency-multiplexing techniques.
A transmitter operates to increase a diversity order of a multi-carrier frequency division multiplex (MC-FDM) system.
The invention relates to a technique for eliminating crosstalk in a transmitter which is operated according to a frequency multiplex-full duplex mode.
The present invention provides a method and apparatus (100) for optical spectral power monitoring employing novel frequency-division-multiplexing detection schemes.
The radio link to the transceivers may be frequency or time division multiplexed, but communication over the network will normally be frequency multiplexed, using separate bands for transmission and reception.
The optical signal comprises an optical wavelength carrier which has been modulated to carry a set of frequency multiplexed traffic flows (A, B, C, D) for the plurality of end terminal units (12).
An OFDM receiver includes an adaptive equalizer, which acts on a received signal, after conversion to digital samples.
The architecture involves downstream and upstream FDM multiplexing techniques to allow contemporaneous, parallel communications across a plurality of frequency channels.
Requêtes fréquentes français :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
Requêtes fréquentes anglais :1-200, -1k, -2k, -3k, -4k, -5k, -7k, -10k, -20k, -40k, -100k, -200k, -500k, -1000k,
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