Sentence examples for spreading in frequency from inspiring English sources

The baseband equivalent of the transmitted signal, with a spreading in frequency, can be written as (31).

Figure 4 Transmission scheme for the CDMA-OFDM/OQAM system with spreading in frequency of complex data.

In this section, we keep the same assumptions as the ones used for the transmission of complex data with a spreading in frequency.

Now, if we consider the CDMA-OFDM/OQAM with spreading in time, contrary to the case of a spreading in frequency domain, as long as the channel is constant during the spreading time duration, we can perform despreading before equalization.

Figure 7 BER for the complex version of the Alamouti CDMA-OFDM/OQAM with spreading in frequency domain, versus Alamouti CP-OFDM for transmission over a flat fading channel.

This scheme satisfies a real orthogonality condition and can work for a number of users up to. Figure 3 Transmission scheme for the CDMA-OFDM/OQAM system with spreading in frequency of real data.

Then, two different approaches with Alamouti coding are proposed, by considering either a spreading in the frequency (in Section 3.2) or in the time domain (in Section 4.2).

When applying spreading in the frequency domain such as in pure MC-CDMA (Multi-Carrier-CDMA) [20], for a user at a given time, different data are transmitted denoted by:.

The key issue in designing an efficient system is to combine the benefits of both spreading in time and frequency domains to develop a scheme that has the potential of maximizing the achievable diversity in a multi-rate, multiple-access environment.

The traditional definitions of time duration and frequency bandwidth describe the degree of a distribution's spreading in the time-frequency domain.

The input data is divided into multiple pairs of bit sub-sequences, where the first and second ones of each pair are spread in the frequency domain by directly multiplying with the chaotic sequence and the delayed version, respectively.