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Method and apparatus for transmitting signals

A technology for transmission signal and signal generation, which is applied to the separation device of transmission path, sub-channel allocation of transmission path, and transmission modification based on link quality, etc. It can solve the problems of high power consumption and increase the linear area of ​​power amplifier.

Inactive Publication Date: 2021-10-01
TELEFON AB LM ERICSSON (PUBL)
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

Another possibility is to increase the linear region of the power amplifier, which in turn leads to a larger amplifier and thus higher power consumption

Method used

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  • Method and apparatus for transmitting signals
  • Method and apparatus for transmitting signals
  • Method and apparatus for transmitting signals

Examples

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Embodiment Construction

[0037] figure 1 A communication environment is shown in which embodiments of the present disclosure may be applied. A wireless communication device 1 configured to operate within a cellular communication system communicates wirelessly with a network node 2 (eg a radio base station) of the cellular communication system. Such as figure 1 As shown in , in some embodiments, a wireless communication device 1 may be configured to perform D2D communication with another wireless communication device 3 in a sidelink frequency band. The wireless communication devices 1 (and 3) may for example be mobile phones, or other devices commonly referred to as UE (User Equipment) in 3GPP standards.

[0038] figure 2 The frequency bands of the cellular communication system are shown. Reference numeral 4 refers to an overall frequency band within which frequency resources for transmitting signals can be allocated to wireless communication devices. Therefore, Band 4 may be a UL band. Altern...

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Abstract

A radio transmitter circuit (10) for transmitting signals within an uplink or sidelink frequency band of a cellular communication system is disclosed. It comprises: a signal generating circuit (20) configured to generate a transmission signal to be transmitted; and a radio front end circuit (30) connected to the signal generating circuit (20) at an input of the radio front end circuit (30) for A transmission signal is received and is configured to be connected to an antenna (40) at an output of the radio front-end circuit, and to transmit the transmission signal to a remote node through said antenna (40). The signal generating circuit (20) is configured to select a distortion function (D1, D2) based on the location of radio frequency resources allocated for transmitting signals within said uplink or sidelink frequency band. Furthermore, the signal generation circuit (20) is configured to generate an intermediate transmission signal based on information to be conveyed in the transmission signal. Furthermore, the signal generation circuit (20) is configured to generate the transmission signal by applying a distortion function (D1, D2) to the intermediate transmission signal.

Description

Background technique [0001] OFDM in LTE and 5G [0002] In 3GPP (Third Generation Partnership Project) LTE (Long Term Evolution), DL (Downlink) uses OFDM (Orthogonal Frequency Division Multiplexing), while UL (Uplink) and D2D (Device-to-Device) sidelinks (sidelink) uses DFTS-OFDM (Discrete Fourier Transform Spread OFDM), sometimes called SC-FDMA (Single Carrier Frequency Division Multiple Access). The reason for choosing DFTS-OFDM for UL and sidelink is mainly due to the similarity with OFDM Compared with, DFTS-OFDM has a lower peak-to-average power ratio (PAPR), which reduces the power backoff required by the power amplifier and increases coverage. DFTS-OFDM uses FFT (Fast Fourier Transform) as a precoder to reduce peak power. However, precoding and subsequent design constraints introduce significant constraints in UL scheduling flexibility and UL design, and also lead to worse link performance, especially at high SINR (Signal to Interference and Noise Ratio ) case. Furthe...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26H04L5/00
CPCH04L5/0044H04L27/2614H04L1/0003H04L5/0007H04L27/2623H04W72/0453
Inventor B·林多夫S·A·阿什拉夫R·巴尔德梅尔L·松德斯特伦
Owner TELEFON AB LM ERICSSON (PUBL)
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