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Hybrid multiple access system for long term evolution (LTE) uplink

An access system and link technology, applied in multi-frequency code systems, transmission systems, radio transmission systems, etc., can solve the problems of reducing the power efficiency of RF power amplifiers and increasing terminal costs

Active Publication Date: 2014-03-12
SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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AI Technical Summary

Problems solved by technology

The transmission technology with high PAPR will reduce the power efficiency of the RF power amplifier and require a large linear range of the transmitter power amplifier, thereby increasing the complexity of the D / A and A / D converters and increasing the cost of the terminal

Method used

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  • Hybrid multiple access system for long term evolution (LTE) uplink
  • Hybrid multiple access system for long term evolution (LTE) uplink
  • Hybrid multiple access system for long term evolution (LTE) uplink

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Embodiment Construction

[0018] The above content of the invention of the present invention will be further described in detail below in conjunction with specific embodiments.

[0019] However, it should not be construed that the scope of the above-mentioned subject matter of the present invention is limited to the following examples. Without departing from the above-mentioned technical idea of ​​the present invention, various replacements and changes made according to common technical knowledge and customary means in this field shall be included in the scope of the present invention.

[0020] Figure 4 It is the SC-FDMA-IDMA system architecture diagram. Depend on Figure 4 It can be seen that the SC-FDMA-IDMA system is established on the basis of OFDM-IDMA, just like the difference between SC-FDMA and OFDMA, the DFT module and the IDFT module are expanded. The SC-FDMA-IDMA system architecture is similar to the OFDM-IDMA system architecture, the basic system structure is the same, and the two syste...

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Abstract

The invention discloses a hybrid multiple access system for a long term evolution (LTE) link. The hybrid multiple access system is characterized in that: in an orthogonal frequency division multiplexing (OFDM)-interleave-division multiple-access (IDMA) hybrid multiple access technical system combining an OFDM multicarrier technology and an IDMA multiple access technology, single carrier frequency division multiple access (SC-FDMA) is adopted and combined with IDMA to form an SC-FDMA-IDMA technology instead of an OFDM transmission technology, and exactly, a discrete Fourier transform (DFT) module is arranged at a transmitter of the OFDM-IDMA system, an inverse discrete Fourier transform (IDFT) module is arranged at a receiver, transmitter user data is sequentially subjected to IDMA modulation and SC-FDMA modulation and then transmitted by a wireless channel, and the receiver sequentially performs SC-FDMA demodulation and IDMA demodulation. The hybrid multiple access system ensures a relatively lower peak-to-average power ratio (PAPR), and is applied to the uplink communication of wireless communication.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a hybrid multiple access system of LTE uplink, that is, a hybrid multiple access system combining SC-FDMA technology and IDMA multiple access communication technology. Background technique [0002] The peak-to-average power ratio (PAPR) mainly characterizes the ratio between the amplitude peak value and the average value of the transmitted signal. Multi-carrier technology, such as Orthogonal Frequency Division Multiplexing (OFDM), its signal is superimposed by a large number of independently modulated signals with different carrier frequencies, and has a high PAPR. In an extreme case, if N subcarriers have signals with the same phase superimposed, the amplitude of the resulting peak is N times the average signal amplitude. The transmission technology with high PAPR will reduce the power efficiency of the RF power amplifier and require a large linear range ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B7/204H04B7/208H04L27/26
Inventor 熊兴中
Owner SICHUAN UNIVERSITY OF SCIENCE AND ENGINEERING
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