A kind of multi-carrier signal modulation method

A technology of multi-carrier signal and multi-carrier modulation, applied in the direction of modulated carrier system, multi-frequency code system, digital transmission system, etc., can solve the problem of high peak-to-average power ratio of multi-carrier modulated signal, achieve optimal energy aggregation, reduce Effect of signal distortion, small out-of-band leakage

Active Publication Date: 2022-05-27
NAVAL AVIATION UNIV
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Problems solved by technology

However, this method also has problems such as high peak-to-average power ratio of multi-carrier modulation signals, so further improving the performance of PSWF-based multi-carrier time-domain quadrature modulation signals and reducing peak-to-average power ratio are also problems that need further research and solution.

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  • A kind of multi-carrier signal modulation method
  • A kind of multi-carrier signal modulation method
  • A kind of multi-carrier signal modulation method

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Embodiment Construction

[0066] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0067] like Figure 1-2 The multi-carrier signal modulation method shown includes the following steps:

[0068] (1) Group the input bit information data: the serial input binary bit period is T b the bitstream b i Divided into k groups, i=1,2,..., each group is a bit stream data block composed of N bits, with a k,n represents, where: k=1,2,...,n=1,2,...,N, N also represents the Nth subcarrier, a k,n To satisfy the CPM modulator input information symbol sequence value ±1 (binary), a 1,n represents the first group of N-bit data blocks, a 2,n Represents the second group of N-bit data blocks, and so on k,n represents the N-bit data block of the kth group;

[0069] (2) The grouped binary signal is converted into a complex signal by the CPM mapper: the {a obtained in...

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Abstract

The invention relates to a multi-carrier signal modulation method, which belongs to the technical field of wireless communication. The method includes the following steps: grouping the input bit information data; the grouped binary signal is converted into a complex signal by a CPM mapper; PSWF sub-carrier signals of various orders are generated and PSWF multi-carrier modulation; the transmitted signal is transmitted through a Gaussian channel to the receiving end; The receiving end performs PSWF orthogonal subcarrier group matching on the received signal; performs CPM demapping on the signal obtained in the previous step, combines the demapped bit data, and outputs the data. This method will not lose the utilization rate of the system frequency band. By adding CPM mapping to the input signal of the multi-carrier PSWF system and changing the modulation index parameter, the power spectral density characteristics of the modulated signal with fast out-of-band attenuation can be obtained, and the existing multi-carrier The peak-to-average power ratio of the PSWF modulated signal reduces the signal distortion caused by the power amplifier, and can improve the existing multi-carrier PSWF demodulation performance.

Description

technical field [0001] The invention relates to a multi-carrier signal modulation method, in particular to a multi-carrier PSWF-CPM joint modulation method, which belongs to the technical field of wireless communication. Background technique [0002] The Prolate Spheroidal Wave Functions (PSWF) signal is a complete set of orthogonal band-limited functions proposed by D. Slepian and O. It has excellent basic characteristics such as frequency energy aggregation, flexible controllability of time-bandwidth product, complete bi-orthogonality, and time-domain parity symmetry. It has been used in radar, UWB communication, satellite communication, optics, mathematics and other fields. Under the same parameters, the zero-order PSWF is the optimal time-frequency energy aggregation signal in the PSWF function set. [0003] Multi-carrier modulation technology is one of the mainstream hot research technologies in mobile communication. It converts high-speed data streams with high bandwi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L27/26
CPCH04L27/2614H04L27/2627H04L27/2649
Inventor 杨大伟张磊刘传辉王红星康家方刘锡国
Owner NAVAL AVIATION UNIV
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