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Method and apparatus for providing multi-carrier modulated signal

A multi-carrier modulation and signal technology, applied in the field of signal devices, can solve the problem of not providing signals that can provide multi-carrier modulation

Active Publication Date: 2020-11-06
ALCATEL LUCENT SAS
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] So far, there is no effective solution to provide devices and methods capable of providing UF-OFDM type multi-carrier modulated signals

Method used

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  • Method and apparatus for providing multi-carrier modulated signal
  • Method and apparatus for providing multi-carrier modulated signal
  • Method and apparatus for providing multi-carrier modulated signal

Examples

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Embodiment Construction

[0071] figure 1 Schematically depicts a block diagram of a traditional UF-OFDM transmitter 1000, the traditional UF-OFDM transmitter 1000 has been explained in detail above, due to IDFT diffuser units 1012_1, ... and convolution filter units 1014_1, ..., Conventional UF-OFDM transmitter 1000 disadvantageously exhibits relatively high complexity.

[0072] figure 2 Schematically depicts an exemplary multi-carrier modulated signal mcs of UF-OFDM type, which can be obtained by using figure 1 The traditional UF-OFDM transmitter 1000 used to obtain the multi-carrier modulated signal mcs can also be obtained at least approximately by the apparatus and method according to this embodiment explained in detail below. More specifically, in figure 2 , the horizontal axis cx represents frequency spacing in units of subcarrier steps of the multicarrier modulated signal mcs, and the vertical axis cy represents relative power in decibels (dB).

[0073] From figure 2 It can be seen that...

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Abstract

The invention relates to a method of providing a multi-carrier modulated signal (mcs) comprising at least one sub-band (sbl) comprising a plurality of sub-carriers (sc), the method comprising the steps of: receiving ( 200) An input signal vector (s), wherein each component of the input signal vector (s) is associated with one of the plurality of subcarriers; by adding before or after the components of the input signal vector (s) One or more additional vector elements, expanding (210) the input signal vector (s), thereby expanding the signal vector (s ext ) is obtained; for the extended signal vector (s ext ) for upsampling (220), thus the upsampled signal vector (s up ) is obtained; the signal vector to be upsampled (s up ) filtering to obtain the filtered subband output signal (X filt ).

Description

technical field [0001] The invention relates to a method of providing a multi-carrier modulated signal comprising at least one sub-band comprising a plurality of sub-carriers, wherein an input signal vector is received, and wherein each component of said input signal vector is related to said associated with one of multiple subcarriers. [0002] The invention also relates to a device for providing a multi-carrier modulated signal. Background technique [0003] Multicarrier modulated signals are widely used in telecommunications. The dominant wireless physical layer waveform today is cyclic prefix (CP-) orthogonal frequency division multiplexing (OFDM). It is used in fourth generation (4G) cellular systems such as LTE(-A) and IEEE 802.11 standards. A disadvantage of CP-OFDM is its spectral property of high sidelobe levels. Therefore, CP-OFDM must operate in strict time-frequency alignment in order to avoid inter-carrier interference. [0004] Schaich, F.; Wild, T.; Chen,...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/2644H04L27/26414H04L27/2636
Inventor T·维尔德F·沙伊希
Owner ALCATEL LUCENT SAS
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