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generate fsk signal included in ofdm signal

A signal and signal phase technology, applied in the field of frequency shift keying signal generation, can solve problems such as large distortion and interference, and achieve the effect of reducing the absolute value

Active Publication Date: 2022-05-31
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the fact that the generated signal is not GFSK will have some impact on the GFSK demodulator, as the IFFT generated FSK signal will be less distorted than the appropriate GFSK signal is more distorted
In addition, the frequency spectrum of the FSK signal generated by IFFT is wider, which may also cause additional interference in adjacent channels

Method used

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  • generate fsk signal included in ofdm signal
  • generate fsk signal included in ofdm signal
  • generate fsk signal included in ofdm signal

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Embodiment Construction

[0065] Hereinafter, embodiments of the present disclosure will be described and illustrated more fully with reference to the accompanying drawings. However, the solutions disclosed herein

[0066] Hereinafter, the following embodiments will be described: the phase of the FSK symbol to be transmitted is selected so that when the FSK symbol is turned on

[0067] The selection method is applied in connection with the generation of the FSK signal included in the OFDM signal, wherein the OFDM is allocated

[0068] FIG. 1 schematically illustrates an exemplary scenario to which certain embodiments may be applicable. In this scenario, the access point (AP)

[0069] Thus, in the scenario shown in FIG. 1, it can be assumed that the AP 100 is configured to support two different types of wireless communications

[0070] FIG. 2 schematically illustrates an exemplary FSK signal included in an OFDM signal in accordance with some embodiments. combine

[0075] FIG. 3 is a flowchart illustrating...

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Abstract

A method of generating a Frequency Shift Keying (FSK) signal included in an Orthogonal Frequency Division Multiplexing (OFDM) signal comprising a plurality of subcarriers is disclosed. The FSK signal includes FSK symbols, where each FSK symbol has a corresponding FSK symbol frequency. The method includes: allocating a group of adjacent subcarriers to transmit FSK signals, the group being a subset of a plurality of subcarriers; associating each FSK symbol frequency with a corresponding subcarrier in a group of adjacent subcarriers; For each FSK symbol to be transmitted, select the FSK symbol phase such that the phase of the FSK signal at the beginning of the FSK symbol to be transmitted meets the phase difference criterion with respect to the phase of the FSK signal at the end of the previous FSK symbol; based on the selected FSK symbol Phase modulating the subcarrier corresponding to the FSK symbol frequency and muting the remaining subcarriers of the group, generating an FSK signal comprising the FSK symbol to be transmitted.

Description

Generate FSK signal included in OFDM signal technical field [0001] The present disclosure generally relates to the field of wireless communications. More specifically, the present disclosure relates to the inclusion of orthogonal frequency division multiplexing in Generation of Frequency Shift Keying (FSK) signals in (OFDM) signals. Background technique [0002] The Internet of Things (IoT) promises to dramatically increase the number of connected wireless devices. Multiple appliances (e.g. microwave ovens and other household appliances) operate at a frequency of about 2.4GHz. Electromagnetic radiation emitted by these devices has the potential to be harmful to nearby operating Wireless communication devices on almost the same frequency cause interference. In order to avoid interference caused by non-wireless communication equipment, the Certain frequency bands are reserved for wireless communication purposes through international agreements. The use of these rese...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/32H04L27/10H04L27/26
CPCH04L27/10H04L27/233H04L27/2602H04L27/32H04L27/2697
Inventor 列夫·维尔赫姆森米格尔·洛佩斯
Owner TELEFON AB LM ERICSSON (PUBL)
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