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Symbol detection and inhibiting method of phase noise in multi-carrier signaling system

A multi-carrier communication and phase noise technology, which is applied in the field of communication, can solve the problems that the influence of phase noise on the OFDM system cannot be fundamentally eliminated, the suppression of phase noise is not complete, and the phase noise cannot be dealt with, and high-frequency noise can be estimated and compensated. The phase noise algorithm is simple, the hardware cost is small, and the effect of solving the phase noise problem

Inactive Publication Date: 2007-07-18
UNIV OF ELECTRONICS SCI & TECH OF CHINA
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

if f L less than f s , the influence of CPE will occupy a dominant position, and CPEC can eliminate most of the influence of phase noise; on the contrary, the influence of ICI will occupy a dominant position. Since the CPEC method cannot deal with phase noise and high-frequency noise, this method is invalid
Therefore, the traditional CPEC method is very incomplete in suppressing phase noise, and cannot fundamentally eliminate the influence of phase noise on OFDM systems.

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  • Symbol detection and inhibiting method of phase noise in multi-carrier signaling system
  • Symbol detection and inhibiting method of phase noise in multi-carrier signaling system
  • Symbol detection and inhibiting method of phase noise in multi-carrier signaling system

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Embodiment Construction

[0068] The symbol-by-symbol detection and suppression method of phase noise in the multi-carrier communication system provided by the present invention can be realized by DSP circuit, or Field Programmable Gate Array (FPGA for short) (such as Stratix series FPGA of Altera Company), also can be realized by ASIC (ASIC) to achieve. No matter which method is used, it needs to be designed and verified by software system simulation. Here, an embodiment is given by using software simulation method. The results given by this method can be converted and synthesized by software, and mapped to one of the above-mentioned realizations. The simulation software uses Matlab 6.1, and the program flow chart is shown in Figure 8. For simplicity in the simulation, the cyclic prefix (CP for short) in the OFDM system is not considered, and ideal synchronization is considered, and the channel condition is considered as an additive white Gaussian noise channel (AWGN for short).

[0069] Simulation p...

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Abstract

This invention discloses a receiver phase noise successive symbol checking and restraining method of a multi-carrier communication system. It adds certain number of phase and noise detecting carrier set at the two ends of the outgoing channel strip, the receiving end bases on the distortion caused by the vibration of the carrier set to use convolution method to get the phase and noise influencing the symbols, and restrains symbol successively to the phase and noise of the symbol according to the obtained information. This method can effectively estimate and restrain low-frequency noise inducted by the phase noise and most of the high-frequency noise.

Description

Technical field: [0001] The invention belongs to the technical field of communication, and in particular relates to a processing technology for phase noise introduced by an oscillating source in a multi-carrier communication system. Background technique: [0002] Orthogonal Frequency Division Multiplexing (OFDM) technology based on multi-carrier scheme is one of the most promising modulation and demodulation technologies in the field of communication technology. OFDM technology is a technology that divides a high-speed information code stream into many low-speed code streams and transmits them in parallel on a group of orthogonal sub-channels. Using OFDM technology can expand the width of sub-channel transmission symbols, thus greatly simplifying the design of the equalizer in the receiver. At the same time, OFDM technology adopts Time Guard Interval (TGI for short) to effectively remove Inter-Symbol Interference (ISI for short), thereby overcoming multipath interference sh...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04B1/10H04J11/00
Inventor 朱维乐
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA