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F-OFDM system transceiver design method based on amplitude limiting of compressed sensing

A technology of F-OFDM and compressed sensing, which is applied in the field of information and communication, and can solve problems such as large amount of noise, insufficient quantization precision, intermodulation distortion between carriers, etc.

Active Publication Date: 2019-10-11
四川创数智慧科技股份有限公司
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Problems solved by technology

[0003] Without any processing, high PAPR will have many adverse effects on the system: on the one hand, the peak value of the signal exceeds the saturation region of the power amplifier (HPA), which will cause nonlinear distortion and intermodulation distortion between carriers; on the other hand, when AD / DA conversion If the quantization accuracy is not enough, large quantization noise will be generated

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  • F-OFDM system transceiver design method based on amplitude limiting of compressed sensing
  • F-OFDM system transceiver design method based on amplitude limiting of compressed sensing
  • F-OFDM system transceiver design method based on amplitude limiting of compressed sensing

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Embodiment Construction

[0057] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

[0058] figure 1 It is a flowchart of the algorithm, including repeated Clipping and Filtering at the sending end, the introduction of multipath channels, and the Turbo-CS iterative receiver at the receiving end.

[0059] Provide a specific implementation method of the present invention based on above-mentioned algorithm below, the parameter setting of this specific method is as follows:

[0060] At the sending end, QPSK modulation is used, the number of F-OFDM subcarriers is 1024, 4 times upsampling and sinc shaped pulses are used. Clipping and Filtering three times, define Where A is the threshold, set CR (ClippingRatio) to 1.4. The length of the cyclic prefix is ​​45, using the sinc function and using the hanning window for soft truncation to construct an FIR filter with an order of 512 as the Subba...

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Abstract

The invention belongs to the technical field of information and communication, and relates to an F-OFDM system transceiver design method based on amplitude limiting of compressed sensing. In order tomore effectively reduce PAPR and fully utilize known information to recover a truncated part z so as to more accurately recover a signal, the present invention proposes repeating Clipping_Filling andusing a Turbo-CS algorithm to recover a missing signal in a time domain. On the one hand, through repeated Clipping_Filling, PAPP is reduced. On the other hand, a receiving end uses a Turbo-QSoppy (using the TCP-Composite) algorithm to iteratively detect an interference signal, thereby ensuring reliability of transmission.

Description

technical field [0001] The invention belongs to the technical field of information and communication, and relates to a design method of an F-OFDM system transceiver based on clipping of compressed sensing. Background technique [0002] For a multi-carrier communication system, the signal is superimposed by multiple sub-carriers in the time domain. At this time, if the carriers are in the same phase at some positions, the amplitude will be superimposed and a high peak will appear. This makes multi-carrier communication face the peak-to-average power ratio. High PAPR problem, and PAPR will gradually increase as the number of subcarriers increases. F-OFDM has been listed as a 5G candidate waveform, and as an orthogonal multi-carrier communication technology, it also faces the problem of high PAPR. [0003] Without any processing, high PAPR will have many adverse effects on the system: on the one hand, the peak value of the signal exceeds the saturation region of the power ampl...

Claims

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Application Information

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IPC IPC(8): H04L27/26
CPCH04L27/2614H04L27/2628H04L27/265
Inventor 袁晓军姜文俊
Owner 四川创数智慧科技股份有限公司
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