Multi-carrier signal modulation method

A multi-carrier signal, multi-carrier modulation technology, applied in modulation carrier system, multi-frequency code system, digital transmission system and other directions, can solve the problem of high peak-to-average power ratio of multi-carrier modulation signal

Active Publication Date: 2021-04-13
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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Embodiment Construction

[0066] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention.

[0067] Such as Figure 1-2 The shown multi-carrier signal modulation method comprises the following steps:

[0068] (1) Group the input bit information data: the serial input binary bit period is T b bitstream b i Divided into k groups, i=1,2,..., each group is a bit stream data block composed of N bits, using a k,n Represents, where: k=1,2,..., n=1,2,...,N, N also represents the Nth subcarrier, a k,n In order to meet 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 a k,n Indicates the k-th group of N-bit data blocks;

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

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Abstract

The invention relates to a multi-carrier signal modulation method, and belongs to the technical field of wireless communication. The method comprises the following steps: grouping input bit information data; converting the grouped binary signals into complex signals by a CPM mapper; generating a subcarrier signal of each order of the PSWF and performing PSWF multi-carrier modulation; transmitting a transmitting signal to a receiving end through a Gaussian channel; the receiving end performing PSWF orthogonal subcarrier group matching on the received signals; and performing CPM de-mapping on the signal obtained in the previous step, combining the de-mapped bit data, and outputting the data. According to the method, the system frequency band utilization rate cannot be lost, the modulation signal power spectral density characteristic with fast out-of-band attenuation can be obtained by adding CPM mapping to the multi-carrier PSWF system input signal and changing the modulation index parameter, the peak-to-average power ratio of the existing multi-carrier PSWF modulation signal can be effectively reduced, signal distortion caused by a power amplifier is reduced. And the existing multi-carrier PSWF demodulation performance can be improved.

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 set of complete orthogonal band-limited functions proposed by D. Slepian and O. Pollak of Bell Laboratories in the United States in 1961. Excellent basic characteristics such as frequency energy aggregation, flexible controllability of time-bandwidth product, complete biorthogonality, time-domain parity symmetry, etc., have been applied in radar, ultra-wideband communication, satellite communication, optics, mathematics and other fields. Under the same parameter conditions, 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 ...

Claims

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Application Information

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Patent Type & Authority Applications(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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